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167e418fa0
An -ENOMEM error is not reported in the GTK GUI. Instead this error message pops up on the screen: [root@m35lp76 perf]# ./perf report -i perf.data.error68-1 Processing events... [974K/3M] Error:failed to process sample 0xf4198 [0x8]: failed to process type: 68 However when I use the same perf.data file with --stdio it works: [root@m35lp76 perf]# ./perf report -i perf.data.error68-1 --stdio \ | head -12 # Total Lost Samples: 0 # # Samples: 76K of event 'cycles' # Event count (approx.): 99056160000 # # Overhead Command Shared Object Symbol # ........ ............... ................. ......... # 8.81% find [kernel.kallsyms] [k] ftrace_likely_update 8.74% swapper [kernel.kallsyms] [k] ftrace_likely_update 8.34% sshd [kernel.kallsyms] [k] ftrace_likely_update 2.19% kworker/u512:1- [kernel.kallsyms] [k] ftrace_likely_update The sample precentage is a bit low..... The GUI always fails in the FINISHED_ROUND event (68) and does not indicate the reason why. When happened is the following. Perf report calls a lot of functions and down deep when a FINISHED_ROUND event is processed, these functions are called: perf_session__process_event() + perf_session__process_user_event() + process_finished_round() + ordered_events__flush() + __ordered_events__flush() + do_flush() + ordered_events__deliver_event() + perf_session__deliver_event() + machine__deliver_event() + perf_evlist__deliver_event() + process_sample_event() + hist_entry_iter_add() --> only called in GUI case!!! + hist_iter__report__callback() + symbol__inc_addr_sample() Now this functions runs out of memory and returns -ENOMEM. This is reported all the way up until function perf_session__process_event() returns to its caller, where -ENOMEM is changed to -EINVAL and processing stops: if ((skip = perf_session__process_event(session, event, head)) < 0) { pr_err("%#" PRIx64 " [%#x]: failed to process type: %d\n", head, event->header.size, event->header.type); err = -EINVAL; goto out_err; } This occurred in the FINISHED_ROUND event when it has to process some 10000 entries and ran out of memory. This patch indicates the root cause and displays it in the status line of ther perf report GUI. Output before (on GUI status line): 0xf4198 [0x8]: failed to process type: 68 Output after: 0xf4198 [0x8]: failed to process type: 68 [not enough memory] Committer notes: the 'skip' variable needs to be initialized to -EINVAL, so that when the size is less than sizeof(struct perf_event_attr) we avoid this valid compiler warning: util/session.c: In function ‘perf_session__process_events’: util/session.c:1936:7: error: ‘skip’ may be used uninitialized in this function [-Werror=maybe-uninitialized] err = skip; ~~~~^~~~~~ util/session.c:1874:6: note: ‘skip’ was declared here s64 skip; ^~~~ cc1: all warnings being treated as errors Signed-off-by: Thomas Richter <tmricht@linux.ibm.com> Reviewed-by: Hendrik Brueckner <brueckner@linux.ibm.com> Reviewed-by: Jiri Olsa <jolsa@redhat.com> Cc: Heiko Carstens <heiko.carstens@de.ibm.com> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Link: http://lkml.kernel.org/r/20190423105303.61683-1-tmricht@linux.ibm.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2302 lines
62 KiB
C
2302 lines
62 KiB
C
// SPDX-License-Identifier: GPL-2.0
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#include <errno.h>
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#include <inttypes.h>
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#include <linux/kernel.h>
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#include <traceevent/event-parse.h>
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#include <api/fs/fs.h>
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#include <byteswap.h>
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#include <unistd.h>
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#include <sys/types.h>
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#include <sys/mman.h>
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#include "evlist.h"
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#include "evsel.h"
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#include "memswap.h"
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#include "map.h"
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#include "symbol.h"
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#include "session.h"
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#include "tool.h"
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#include "sort.h"
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#include "util.h"
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#include "cpumap.h"
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#include "perf_regs.h"
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#include "asm/bug.h"
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#include "auxtrace.h"
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#include "thread.h"
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#include "thread-stack.h"
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#include "sample-raw.h"
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#include "stat.h"
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#include "arch/common.h"
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static int perf_session__deliver_event(struct perf_session *session,
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union perf_event *event,
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struct perf_tool *tool,
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u64 file_offset);
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static int perf_session__open(struct perf_session *session)
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{
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struct perf_data *data = session->data;
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if (perf_session__read_header(session) < 0) {
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pr_err("incompatible file format (rerun with -v to learn more)\n");
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return -1;
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}
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if (perf_data__is_pipe(data))
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return 0;
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if (perf_header__has_feat(&session->header, HEADER_STAT))
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return 0;
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if (!perf_evlist__valid_sample_type(session->evlist)) {
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pr_err("non matching sample_type\n");
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return -1;
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}
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if (!perf_evlist__valid_sample_id_all(session->evlist)) {
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pr_err("non matching sample_id_all\n");
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return -1;
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}
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if (!perf_evlist__valid_read_format(session->evlist)) {
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pr_err("non matching read_format\n");
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return -1;
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}
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return 0;
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}
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void perf_session__set_id_hdr_size(struct perf_session *session)
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{
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u16 id_hdr_size = perf_evlist__id_hdr_size(session->evlist);
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machines__set_id_hdr_size(&session->machines, id_hdr_size);
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}
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int perf_session__create_kernel_maps(struct perf_session *session)
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{
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int ret = machine__create_kernel_maps(&session->machines.host);
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if (ret >= 0)
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ret = machines__create_guest_kernel_maps(&session->machines);
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return ret;
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}
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static void perf_session__destroy_kernel_maps(struct perf_session *session)
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{
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machines__destroy_kernel_maps(&session->machines);
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}
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static bool perf_session__has_comm_exec(struct perf_session *session)
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{
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struct perf_evsel *evsel;
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evlist__for_each_entry(session->evlist, evsel) {
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if (evsel->attr.comm_exec)
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return true;
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}
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return false;
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}
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static void perf_session__set_comm_exec(struct perf_session *session)
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{
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bool comm_exec = perf_session__has_comm_exec(session);
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machines__set_comm_exec(&session->machines, comm_exec);
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}
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static int ordered_events__deliver_event(struct ordered_events *oe,
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struct ordered_event *event)
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{
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struct perf_session *session = container_of(oe, struct perf_session,
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ordered_events);
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return perf_session__deliver_event(session, event->event,
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session->tool, event->file_offset);
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}
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struct perf_session *perf_session__new(struct perf_data *data,
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bool repipe, struct perf_tool *tool)
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{
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struct perf_session *session = zalloc(sizeof(*session));
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if (!session)
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goto out;
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session->repipe = repipe;
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session->tool = tool;
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INIT_LIST_HEAD(&session->auxtrace_index);
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machines__init(&session->machines);
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ordered_events__init(&session->ordered_events,
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ordered_events__deliver_event, NULL);
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perf_env__init(&session->header.env);
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if (data) {
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if (perf_data__open(data))
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goto out_delete;
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session->data = data;
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if (perf_data__is_read(data)) {
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if (perf_session__open(session) < 0)
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goto out_delete;
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/*
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* set session attributes that are present in perf.data
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* but not in pipe-mode.
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*/
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if (!data->is_pipe) {
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perf_session__set_id_hdr_size(session);
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perf_session__set_comm_exec(session);
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}
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perf_evlist__init_trace_event_sample_raw(session->evlist);
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/* Open the directory data. */
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if (data->is_dir && perf_data__open_dir(data))
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goto out_delete;
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}
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} else {
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session->machines.host.env = &perf_env;
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}
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session->machines.host.single_address_space =
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perf_env__single_address_space(session->machines.host.env);
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if (!data || perf_data__is_write(data)) {
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/*
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* In O_RDONLY mode this will be performed when reading the
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* kernel MMAP event, in perf_event__process_mmap().
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*/
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if (perf_session__create_kernel_maps(session) < 0)
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pr_warning("Cannot read kernel map\n");
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}
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/*
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* In pipe-mode, evlist is empty until PERF_RECORD_HEADER_ATTR is
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* processed, so perf_evlist__sample_id_all is not meaningful here.
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*/
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if ((!data || !data->is_pipe) && tool && tool->ordering_requires_timestamps &&
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tool->ordered_events && !perf_evlist__sample_id_all(session->evlist)) {
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dump_printf("WARNING: No sample_id_all support, falling back to unordered processing\n");
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tool->ordered_events = false;
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}
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return session;
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out_delete:
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perf_session__delete(session);
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out:
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return NULL;
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}
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static void perf_session__delete_threads(struct perf_session *session)
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{
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machine__delete_threads(&session->machines.host);
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}
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void perf_session__delete(struct perf_session *session)
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{
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if (session == NULL)
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return;
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auxtrace__free(session);
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auxtrace_index__free(&session->auxtrace_index);
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perf_session__destroy_kernel_maps(session);
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perf_session__delete_threads(session);
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perf_env__exit(&session->header.env);
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machines__exit(&session->machines);
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if (session->data)
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perf_data__close(session->data);
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free(session);
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}
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static int process_event_synth_tracing_data_stub(struct perf_session *session
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__maybe_unused,
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union perf_event *event
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__maybe_unused)
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{
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dump_printf(": unhandled!\n");
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return 0;
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}
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static int process_event_synth_attr_stub(struct perf_tool *tool __maybe_unused,
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union perf_event *event __maybe_unused,
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struct perf_evlist **pevlist
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__maybe_unused)
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{
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dump_printf(": unhandled!\n");
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return 0;
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}
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static int process_event_synth_event_update_stub(struct perf_tool *tool __maybe_unused,
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union perf_event *event __maybe_unused,
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struct perf_evlist **pevlist
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__maybe_unused)
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{
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if (dump_trace)
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perf_event__fprintf_event_update(event, stdout);
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dump_printf(": unhandled!\n");
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return 0;
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}
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static int process_event_sample_stub(struct perf_tool *tool __maybe_unused,
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union perf_event *event __maybe_unused,
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struct perf_sample *sample __maybe_unused,
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struct perf_evsel *evsel __maybe_unused,
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struct machine *machine __maybe_unused)
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{
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dump_printf(": unhandled!\n");
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return 0;
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}
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static int process_event_stub(struct perf_tool *tool __maybe_unused,
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union perf_event *event __maybe_unused,
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struct perf_sample *sample __maybe_unused,
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struct machine *machine __maybe_unused)
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{
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dump_printf(": unhandled!\n");
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return 0;
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}
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static int process_finished_round_stub(struct perf_tool *tool __maybe_unused,
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union perf_event *event __maybe_unused,
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struct ordered_events *oe __maybe_unused)
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{
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dump_printf(": unhandled!\n");
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return 0;
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}
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static int process_finished_round(struct perf_tool *tool,
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union perf_event *event,
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struct ordered_events *oe);
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static int skipn(int fd, off_t n)
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{
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char buf[4096];
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ssize_t ret;
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while (n > 0) {
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ret = read(fd, buf, min(n, (off_t)sizeof(buf)));
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if (ret <= 0)
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return ret;
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n -= ret;
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}
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return 0;
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}
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static s64 process_event_auxtrace_stub(struct perf_session *session __maybe_unused,
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union perf_event *event)
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{
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dump_printf(": unhandled!\n");
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if (perf_data__is_pipe(session->data))
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skipn(perf_data__fd(session->data), event->auxtrace.size);
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return event->auxtrace.size;
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}
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static int process_event_op2_stub(struct perf_session *session __maybe_unused,
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union perf_event *event __maybe_unused)
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{
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dump_printf(": unhandled!\n");
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return 0;
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}
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static
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int process_event_thread_map_stub(struct perf_session *session __maybe_unused,
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union perf_event *event __maybe_unused)
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{
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if (dump_trace)
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perf_event__fprintf_thread_map(event, stdout);
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dump_printf(": unhandled!\n");
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return 0;
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}
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static
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int process_event_cpu_map_stub(struct perf_session *session __maybe_unused,
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union perf_event *event __maybe_unused)
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{
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if (dump_trace)
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perf_event__fprintf_cpu_map(event, stdout);
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dump_printf(": unhandled!\n");
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return 0;
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}
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static
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int process_event_stat_config_stub(struct perf_session *session __maybe_unused,
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union perf_event *event __maybe_unused)
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{
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if (dump_trace)
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perf_event__fprintf_stat_config(event, stdout);
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dump_printf(": unhandled!\n");
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return 0;
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}
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static int process_stat_stub(struct perf_session *perf_session __maybe_unused,
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union perf_event *event)
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{
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if (dump_trace)
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perf_event__fprintf_stat(event, stdout);
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dump_printf(": unhandled!\n");
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return 0;
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}
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static int process_stat_round_stub(struct perf_session *perf_session __maybe_unused,
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union perf_event *event)
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{
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if (dump_trace)
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perf_event__fprintf_stat_round(event, stdout);
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dump_printf(": unhandled!\n");
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return 0;
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}
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void perf_tool__fill_defaults(struct perf_tool *tool)
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{
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if (tool->sample == NULL)
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tool->sample = process_event_sample_stub;
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if (tool->mmap == NULL)
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tool->mmap = process_event_stub;
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if (tool->mmap2 == NULL)
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tool->mmap2 = process_event_stub;
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if (tool->comm == NULL)
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tool->comm = process_event_stub;
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if (tool->namespaces == NULL)
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tool->namespaces = process_event_stub;
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if (tool->fork == NULL)
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tool->fork = process_event_stub;
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if (tool->exit == NULL)
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tool->exit = process_event_stub;
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if (tool->lost == NULL)
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tool->lost = perf_event__process_lost;
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if (tool->lost_samples == NULL)
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tool->lost_samples = perf_event__process_lost_samples;
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if (tool->aux == NULL)
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tool->aux = perf_event__process_aux;
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if (tool->itrace_start == NULL)
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tool->itrace_start = perf_event__process_itrace_start;
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if (tool->context_switch == NULL)
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tool->context_switch = perf_event__process_switch;
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if (tool->ksymbol == NULL)
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tool->ksymbol = perf_event__process_ksymbol;
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if (tool->bpf_event == NULL)
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tool->bpf_event = perf_event__process_bpf_event;
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if (tool->read == NULL)
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tool->read = process_event_sample_stub;
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if (tool->throttle == NULL)
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tool->throttle = process_event_stub;
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if (tool->unthrottle == NULL)
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tool->unthrottle = process_event_stub;
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if (tool->attr == NULL)
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tool->attr = process_event_synth_attr_stub;
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if (tool->event_update == NULL)
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tool->event_update = process_event_synth_event_update_stub;
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if (tool->tracing_data == NULL)
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tool->tracing_data = process_event_synth_tracing_data_stub;
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if (tool->build_id == NULL)
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tool->build_id = process_event_op2_stub;
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if (tool->finished_round == NULL) {
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if (tool->ordered_events)
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tool->finished_round = process_finished_round;
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else
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tool->finished_round = process_finished_round_stub;
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}
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if (tool->id_index == NULL)
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tool->id_index = process_event_op2_stub;
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if (tool->auxtrace_info == NULL)
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tool->auxtrace_info = process_event_op2_stub;
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if (tool->auxtrace == NULL)
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tool->auxtrace = process_event_auxtrace_stub;
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if (tool->auxtrace_error == NULL)
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tool->auxtrace_error = process_event_op2_stub;
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if (tool->thread_map == NULL)
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tool->thread_map = process_event_thread_map_stub;
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if (tool->cpu_map == NULL)
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tool->cpu_map = process_event_cpu_map_stub;
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if (tool->stat_config == NULL)
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tool->stat_config = process_event_stat_config_stub;
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if (tool->stat == NULL)
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tool->stat = process_stat_stub;
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if (tool->stat_round == NULL)
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tool->stat_round = process_stat_round_stub;
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if (tool->time_conv == NULL)
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tool->time_conv = process_event_op2_stub;
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if (tool->feature == NULL)
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tool->feature = process_event_op2_stub;
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}
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static void swap_sample_id_all(union perf_event *event, void *data)
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{
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void *end = (void *) event + event->header.size;
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int size = end - data;
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BUG_ON(size % sizeof(u64));
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mem_bswap_64(data, size);
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}
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static void perf_event__all64_swap(union perf_event *event,
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bool sample_id_all __maybe_unused)
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{
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struct perf_event_header *hdr = &event->header;
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mem_bswap_64(hdr + 1, event->header.size - sizeof(*hdr));
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}
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static void perf_event__comm_swap(union perf_event *event, bool sample_id_all)
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{
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event->comm.pid = bswap_32(event->comm.pid);
|
|
event->comm.tid = bswap_32(event->comm.tid);
|
|
|
|
if (sample_id_all) {
|
|
void *data = &event->comm.comm;
|
|
|
|
data += PERF_ALIGN(strlen(data) + 1, sizeof(u64));
|
|
swap_sample_id_all(event, data);
|
|
}
|
|
}
|
|
|
|
static void perf_event__mmap_swap(union perf_event *event,
|
|
bool sample_id_all)
|
|
{
|
|
event->mmap.pid = bswap_32(event->mmap.pid);
|
|
event->mmap.tid = bswap_32(event->mmap.tid);
|
|
event->mmap.start = bswap_64(event->mmap.start);
|
|
event->mmap.len = bswap_64(event->mmap.len);
|
|
event->mmap.pgoff = bswap_64(event->mmap.pgoff);
|
|
|
|
if (sample_id_all) {
|
|
void *data = &event->mmap.filename;
|
|
|
|
data += PERF_ALIGN(strlen(data) + 1, sizeof(u64));
|
|
swap_sample_id_all(event, data);
|
|
}
|
|
}
|
|
|
|
static void perf_event__mmap2_swap(union perf_event *event,
|
|
bool sample_id_all)
|
|
{
|
|
event->mmap2.pid = bswap_32(event->mmap2.pid);
|
|
event->mmap2.tid = bswap_32(event->mmap2.tid);
|
|
event->mmap2.start = bswap_64(event->mmap2.start);
|
|
event->mmap2.len = bswap_64(event->mmap2.len);
|
|
event->mmap2.pgoff = bswap_64(event->mmap2.pgoff);
|
|
event->mmap2.maj = bswap_32(event->mmap2.maj);
|
|
event->mmap2.min = bswap_32(event->mmap2.min);
|
|
event->mmap2.ino = bswap_64(event->mmap2.ino);
|
|
|
|
if (sample_id_all) {
|
|
void *data = &event->mmap2.filename;
|
|
|
|
data += PERF_ALIGN(strlen(data) + 1, sizeof(u64));
|
|
swap_sample_id_all(event, data);
|
|
}
|
|
}
|
|
static void perf_event__task_swap(union perf_event *event, bool sample_id_all)
|
|
{
|
|
event->fork.pid = bswap_32(event->fork.pid);
|
|
event->fork.tid = bswap_32(event->fork.tid);
|
|
event->fork.ppid = bswap_32(event->fork.ppid);
|
|
event->fork.ptid = bswap_32(event->fork.ptid);
|
|
event->fork.time = bswap_64(event->fork.time);
|
|
|
|
if (sample_id_all)
|
|
swap_sample_id_all(event, &event->fork + 1);
|
|
}
|
|
|
|
static void perf_event__read_swap(union perf_event *event, bool sample_id_all)
|
|
{
|
|
event->read.pid = bswap_32(event->read.pid);
|
|
event->read.tid = bswap_32(event->read.tid);
|
|
event->read.value = bswap_64(event->read.value);
|
|
event->read.time_enabled = bswap_64(event->read.time_enabled);
|
|
event->read.time_running = bswap_64(event->read.time_running);
|
|
event->read.id = bswap_64(event->read.id);
|
|
|
|
if (sample_id_all)
|
|
swap_sample_id_all(event, &event->read + 1);
|
|
}
|
|
|
|
static void perf_event__aux_swap(union perf_event *event, bool sample_id_all)
|
|
{
|
|
event->aux.aux_offset = bswap_64(event->aux.aux_offset);
|
|
event->aux.aux_size = bswap_64(event->aux.aux_size);
|
|
event->aux.flags = bswap_64(event->aux.flags);
|
|
|
|
if (sample_id_all)
|
|
swap_sample_id_all(event, &event->aux + 1);
|
|
}
|
|
|
|
static void perf_event__itrace_start_swap(union perf_event *event,
|
|
bool sample_id_all)
|
|
{
|
|
event->itrace_start.pid = bswap_32(event->itrace_start.pid);
|
|
event->itrace_start.tid = bswap_32(event->itrace_start.tid);
|
|
|
|
if (sample_id_all)
|
|
swap_sample_id_all(event, &event->itrace_start + 1);
|
|
}
|
|
|
|
static void perf_event__switch_swap(union perf_event *event, bool sample_id_all)
|
|
{
|
|
if (event->header.type == PERF_RECORD_SWITCH_CPU_WIDE) {
|
|
event->context_switch.next_prev_pid =
|
|
bswap_32(event->context_switch.next_prev_pid);
|
|
event->context_switch.next_prev_tid =
|
|
bswap_32(event->context_switch.next_prev_tid);
|
|
}
|
|
|
|
if (sample_id_all)
|
|
swap_sample_id_all(event, &event->context_switch + 1);
|
|
}
|
|
|
|
static void perf_event__throttle_swap(union perf_event *event,
|
|
bool sample_id_all)
|
|
{
|
|
event->throttle.time = bswap_64(event->throttle.time);
|
|
event->throttle.id = bswap_64(event->throttle.id);
|
|
event->throttle.stream_id = bswap_64(event->throttle.stream_id);
|
|
|
|
if (sample_id_all)
|
|
swap_sample_id_all(event, &event->throttle + 1);
|
|
}
|
|
|
|
static u8 revbyte(u8 b)
|
|
{
|
|
int rev = (b >> 4) | ((b & 0xf) << 4);
|
|
rev = ((rev & 0xcc) >> 2) | ((rev & 0x33) << 2);
|
|
rev = ((rev & 0xaa) >> 1) | ((rev & 0x55) << 1);
|
|
return (u8) rev;
|
|
}
|
|
|
|
/*
|
|
* XXX this is hack in attempt to carry flags bitfield
|
|
* through endian village. ABI says:
|
|
*
|
|
* Bit-fields are allocated from right to left (least to most significant)
|
|
* on little-endian implementations and from left to right (most to least
|
|
* significant) on big-endian implementations.
|
|
*
|
|
* The above seems to be byte specific, so we need to reverse each
|
|
* byte of the bitfield. 'Internet' also says this might be implementation
|
|
* specific and we probably need proper fix and carry perf_event_attr
|
|
* bitfield flags in separate data file FEAT_ section. Thought this seems
|
|
* to work for now.
|
|
*/
|
|
static void swap_bitfield(u8 *p, unsigned len)
|
|
{
|
|
unsigned i;
|
|
|
|
for (i = 0; i < len; i++) {
|
|
*p = revbyte(*p);
|
|
p++;
|
|
}
|
|
}
|
|
|
|
/* exported for swapping attributes in file header */
|
|
void perf_event__attr_swap(struct perf_event_attr *attr)
|
|
{
|
|
attr->type = bswap_32(attr->type);
|
|
attr->size = bswap_32(attr->size);
|
|
|
|
#define bswap_safe(f, n) \
|
|
(attr->size > (offsetof(struct perf_event_attr, f) + \
|
|
sizeof(attr->f) * (n)))
|
|
#define bswap_field(f, sz) \
|
|
do { \
|
|
if (bswap_safe(f, 0)) \
|
|
attr->f = bswap_##sz(attr->f); \
|
|
} while(0)
|
|
#define bswap_field_16(f) bswap_field(f, 16)
|
|
#define bswap_field_32(f) bswap_field(f, 32)
|
|
#define bswap_field_64(f) bswap_field(f, 64)
|
|
|
|
bswap_field_64(config);
|
|
bswap_field_64(sample_period);
|
|
bswap_field_64(sample_type);
|
|
bswap_field_64(read_format);
|
|
bswap_field_32(wakeup_events);
|
|
bswap_field_32(bp_type);
|
|
bswap_field_64(bp_addr);
|
|
bswap_field_64(bp_len);
|
|
bswap_field_64(branch_sample_type);
|
|
bswap_field_64(sample_regs_user);
|
|
bswap_field_32(sample_stack_user);
|
|
bswap_field_32(aux_watermark);
|
|
bswap_field_16(sample_max_stack);
|
|
|
|
/*
|
|
* After read_format are bitfields. Check read_format because
|
|
* we are unable to use offsetof on bitfield.
|
|
*/
|
|
if (bswap_safe(read_format, 1))
|
|
swap_bitfield((u8 *) (&attr->read_format + 1),
|
|
sizeof(u64));
|
|
#undef bswap_field_64
|
|
#undef bswap_field_32
|
|
#undef bswap_field
|
|
#undef bswap_safe
|
|
}
|
|
|
|
static void perf_event__hdr_attr_swap(union perf_event *event,
|
|
bool sample_id_all __maybe_unused)
|
|
{
|
|
size_t size;
|
|
|
|
perf_event__attr_swap(&event->attr.attr);
|
|
|
|
size = event->header.size;
|
|
size -= (void *)&event->attr.id - (void *)event;
|
|
mem_bswap_64(event->attr.id, size);
|
|
}
|
|
|
|
static void perf_event__event_update_swap(union perf_event *event,
|
|
bool sample_id_all __maybe_unused)
|
|
{
|
|
event->event_update.type = bswap_64(event->event_update.type);
|
|
event->event_update.id = bswap_64(event->event_update.id);
|
|
}
|
|
|
|
static void perf_event__event_type_swap(union perf_event *event,
|
|
bool sample_id_all __maybe_unused)
|
|
{
|
|
event->event_type.event_type.event_id =
|
|
bswap_64(event->event_type.event_type.event_id);
|
|
}
|
|
|
|
static void perf_event__tracing_data_swap(union perf_event *event,
|
|
bool sample_id_all __maybe_unused)
|
|
{
|
|
event->tracing_data.size = bswap_32(event->tracing_data.size);
|
|
}
|
|
|
|
static void perf_event__auxtrace_info_swap(union perf_event *event,
|
|
bool sample_id_all __maybe_unused)
|
|
{
|
|
size_t size;
|
|
|
|
event->auxtrace_info.type = bswap_32(event->auxtrace_info.type);
|
|
|
|
size = event->header.size;
|
|
size -= (void *)&event->auxtrace_info.priv - (void *)event;
|
|
mem_bswap_64(event->auxtrace_info.priv, size);
|
|
}
|
|
|
|
static void perf_event__auxtrace_swap(union perf_event *event,
|
|
bool sample_id_all __maybe_unused)
|
|
{
|
|
event->auxtrace.size = bswap_64(event->auxtrace.size);
|
|
event->auxtrace.offset = bswap_64(event->auxtrace.offset);
|
|
event->auxtrace.reference = bswap_64(event->auxtrace.reference);
|
|
event->auxtrace.idx = bswap_32(event->auxtrace.idx);
|
|
event->auxtrace.tid = bswap_32(event->auxtrace.tid);
|
|
event->auxtrace.cpu = bswap_32(event->auxtrace.cpu);
|
|
}
|
|
|
|
static void perf_event__auxtrace_error_swap(union perf_event *event,
|
|
bool sample_id_all __maybe_unused)
|
|
{
|
|
event->auxtrace_error.type = bswap_32(event->auxtrace_error.type);
|
|
event->auxtrace_error.code = bswap_32(event->auxtrace_error.code);
|
|
event->auxtrace_error.cpu = bswap_32(event->auxtrace_error.cpu);
|
|
event->auxtrace_error.pid = bswap_32(event->auxtrace_error.pid);
|
|
event->auxtrace_error.tid = bswap_32(event->auxtrace_error.tid);
|
|
event->auxtrace_error.fmt = bswap_32(event->auxtrace_error.fmt);
|
|
event->auxtrace_error.ip = bswap_64(event->auxtrace_error.ip);
|
|
if (event->auxtrace_error.fmt)
|
|
event->auxtrace_error.time = bswap_64(event->auxtrace_error.time);
|
|
}
|
|
|
|
static void perf_event__thread_map_swap(union perf_event *event,
|
|
bool sample_id_all __maybe_unused)
|
|
{
|
|
unsigned i;
|
|
|
|
event->thread_map.nr = bswap_64(event->thread_map.nr);
|
|
|
|
for (i = 0; i < event->thread_map.nr; i++)
|
|
event->thread_map.entries[i].pid = bswap_64(event->thread_map.entries[i].pid);
|
|
}
|
|
|
|
static void perf_event__cpu_map_swap(union perf_event *event,
|
|
bool sample_id_all __maybe_unused)
|
|
{
|
|
struct cpu_map_data *data = &event->cpu_map.data;
|
|
struct cpu_map_entries *cpus;
|
|
struct cpu_map_mask *mask;
|
|
unsigned i;
|
|
|
|
data->type = bswap_64(data->type);
|
|
|
|
switch (data->type) {
|
|
case PERF_CPU_MAP__CPUS:
|
|
cpus = (struct cpu_map_entries *)data->data;
|
|
|
|
cpus->nr = bswap_16(cpus->nr);
|
|
|
|
for (i = 0; i < cpus->nr; i++)
|
|
cpus->cpu[i] = bswap_16(cpus->cpu[i]);
|
|
break;
|
|
case PERF_CPU_MAP__MASK:
|
|
mask = (struct cpu_map_mask *) data->data;
|
|
|
|
mask->nr = bswap_16(mask->nr);
|
|
mask->long_size = bswap_16(mask->long_size);
|
|
|
|
switch (mask->long_size) {
|
|
case 4: mem_bswap_32(&mask->mask, mask->nr); break;
|
|
case 8: mem_bswap_64(&mask->mask, mask->nr); break;
|
|
default:
|
|
pr_err("cpu_map swap: unsupported long size\n");
|
|
}
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
|
|
static void perf_event__stat_config_swap(union perf_event *event,
|
|
bool sample_id_all __maybe_unused)
|
|
{
|
|
u64 size;
|
|
|
|
size = event->stat_config.nr * sizeof(event->stat_config.data[0]);
|
|
size += 1; /* nr item itself */
|
|
mem_bswap_64(&event->stat_config.nr, size);
|
|
}
|
|
|
|
static void perf_event__stat_swap(union perf_event *event,
|
|
bool sample_id_all __maybe_unused)
|
|
{
|
|
event->stat.id = bswap_64(event->stat.id);
|
|
event->stat.thread = bswap_32(event->stat.thread);
|
|
event->stat.cpu = bswap_32(event->stat.cpu);
|
|
event->stat.val = bswap_64(event->stat.val);
|
|
event->stat.ena = bswap_64(event->stat.ena);
|
|
event->stat.run = bswap_64(event->stat.run);
|
|
}
|
|
|
|
static void perf_event__stat_round_swap(union perf_event *event,
|
|
bool sample_id_all __maybe_unused)
|
|
{
|
|
event->stat_round.type = bswap_64(event->stat_round.type);
|
|
event->stat_round.time = bswap_64(event->stat_round.time);
|
|
}
|
|
|
|
typedef void (*perf_event__swap_op)(union perf_event *event,
|
|
bool sample_id_all);
|
|
|
|
static perf_event__swap_op perf_event__swap_ops[] = {
|
|
[PERF_RECORD_MMAP] = perf_event__mmap_swap,
|
|
[PERF_RECORD_MMAP2] = perf_event__mmap2_swap,
|
|
[PERF_RECORD_COMM] = perf_event__comm_swap,
|
|
[PERF_RECORD_FORK] = perf_event__task_swap,
|
|
[PERF_RECORD_EXIT] = perf_event__task_swap,
|
|
[PERF_RECORD_LOST] = perf_event__all64_swap,
|
|
[PERF_RECORD_READ] = perf_event__read_swap,
|
|
[PERF_RECORD_THROTTLE] = perf_event__throttle_swap,
|
|
[PERF_RECORD_UNTHROTTLE] = perf_event__throttle_swap,
|
|
[PERF_RECORD_SAMPLE] = perf_event__all64_swap,
|
|
[PERF_RECORD_AUX] = perf_event__aux_swap,
|
|
[PERF_RECORD_ITRACE_START] = perf_event__itrace_start_swap,
|
|
[PERF_RECORD_LOST_SAMPLES] = perf_event__all64_swap,
|
|
[PERF_RECORD_SWITCH] = perf_event__switch_swap,
|
|
[PERF_RECORD_SWITCH_CPU_WIDE] = perf_event__switch_swap,
|
|
[PERF_RECORD_HEADER_ATTR] = perf_event__hdr_attr_swap,
|
|
[PERF_RECORD_HEADER_EVENT_TYPE] = perf_event__event_type_swap,
|
|
[PERF_RECORD_HEADER_TRACING_DATA] = perf_event__tracing_data_swap,
|
|
[PERF_RECORD_HEADER_BUILD_ID] = NULL,
|
|
[PERF_RECORD_ID_INDEX] = perf_event__all64_swap,
|
|
[PERF_RECORD_AUXTRACE_INFO] = perf_event__auxtrace_info_swap,
|
|
[PERF_RECORD_AUXTRACE] = perf_event__auxtrace_swap,
|
|
[PERF_RECORD_AUXTRACE_ERROR] = perf_event__auxtrace_error_swap,
|
|
[PERF_RECORD_THREAD_MAP] = perf_event__thread_map_swap,
|
|
[PERF_RECORD_CPU_MAP] = perf_event__cpu_map_swap,
|
|
[PERF_RECORD_STAT_CONFIG] = perf_event__stat_config_swap,
|
|
[PERF_RECORD_STAT] = perf_event__stat_swap,
|
|
[PERF_RECORD_STAT_ROUND] = perf_event__stat_round_swap,
|
|
[PERF_RECORD_EVENT_UPDATE] = perf_event__event_update_swap,
|
|
[PERF_RECORD_TIME_CONV] = perf_event__all64_swap,
|
|
[PERF_RECORD_HEADER_MAX] = NULL,
|
|
};
|
|
|
|
/*
|
|
* When perf record finishes a pass on every buffers, it records this pseudo
|
|
* event.
|
|
* We record the max timestamp t found in the pass n.
|
|
* Assuming these timestamps are monotonic across cpus, we know that if
|
|
* a buffer still has events with timestamps below t, they will be all
|
|
* available and then read in the pass n + 1.
|
|
* Hence when we start to read the pass n + 2, we can safely flush every
|
|
* events with timestamps below t.
|
|
*
|
|
* ============ PASS n =================
|
|
* CPU 0 | CPU 1
|
|
* |
|
|
* cnt1 timestamps | cnt2 timestamps
|
|
* 1 | 2
|
|
* 2 | 3
|
|
* - | 4 <--- max recorded
|
|
*
|
|
* ============ PASS n + 1 ==============
|
|
* CPU 0 | CPU 1
|
|
* |
|
|
* cnt1 timestamps | cnt2 timestamps
|
|
* 3 | 5
|
|
* 4 | 6
|
|
* 5 | 7 <---- max recorded
|
|
*
|
|
* Flush every events below timestamp 4
|
|
*
|
|
* ============ PASS n + 2 ==============
|
|
* CPU 0 | CPU 1
|
|
* |
|
|
* cnt1 timestamps | cnt2 timestamps
|
|
* 6 | 8
|
|
* 7 | 9
|
|
* - | 10
|
|
*
|
|
* Flush every events below timestamp 7
|
|
* etc...
|
|
*/
|
|
static int process_finished_round(struct perf_tool *tool __maybe_unused,
|
|
union perf_event *event __maybe_unused,
|
|
struct ordered_events *oe)
|
|
{
|
|
if (dump_trace)
|
|
fprintf(stdout, "\n");
|
|
return ordered_events__flush(oe, OE_FLUSH__ROUND);
|
|
}
|
|
|
|
int perf_session__queue_event(struct perf_session *s, union perf_event *event,
|
|
u64 timestamp, u64 file_offset)
|
|
{
|
|
return ordered_events__queue(&s->ordered_events, event, timestamp, file_offset);
|
|
}
|
|
|
|
static void callchain__lbr_callstack_printf(struct perf_sample *sample)
|
|
{
|
|
struct ip_callchain *callchain = sample->callchain;
|
|
struct branch_stack *lbr_stack = sample->branch_stack;
|
|
u64 kernel_callchain_nr = callchain->nr;
|
|
unsigned int i;
|
|
|
|
for (i = 0; i < kernel_callchain_nr; i++) {
|
|
if (callchain->ips[i] == PERF_CONTEXT_USER)
|
|
break;
|
|
}
|
|
|
|
if ((i != kernel_callchain_nr) && lbr_stack->nr) {
|
|
u64 total_nr;
|
|
/*
|
|
* LBR callstack can only get user call chain,
|
|
* i is kernel call chain number,
|
|
* 1 is PERF_CONTEXT_USER.
|
|
*
|
|
* The user call chain is stored in LBR registers.
|
|
* LBR are pair registers. The caller is stored
|
|
* in "from" register, while the callee is stored
|
|
* in "to" register.
|
|
* For example, there is a call stack
|
|
* "A"->"B"->"C"->"D".
|
|
* The LBR registers will recorde like
|
|
* "C"->"D", "B"->"C", "A"->"B".
|
|
* So only the first "to" register and all "from"
|
|
* registers are needed to construct the whole stack.
|
|
*/
|
|
total_nr = i + 1 + lbr_stack->nr + 1;
|
|
kernel_callchain_nr = i + 1;
|
|
|
|
printf("... LBR call chain: nr:%" PRIu64 "\n", total_nr);
|
|
|
|
for (i = 0; i < kernel_callchain_nr; i++)
|
|
printf("..... %2d: %016" PRIx64 "\n",
|
|
i, callchain->ips[i]);
|
|
|
|
printf("..... %2d: %016" PRIx64 "\n",
|
|
(int)(kernel_callchain_nr), lbr_stack->entries[0].to);
|
|
for (i = 0; i < lbr_stack->nr; i++)
|
|
printf("..... %2d: %016" PRIx64 "\n",
|
|
(int)(i + kernel_callchain_nr + 1), lbr_stack->entries[i].from);
|
|
}
|
|
}
|
|
|
|
static void callchain__printf(struct perf_evsel *evsel,
|
|
struct perf_sample *sample)
|
|
{
|
|
unsigned int i;
|
|
struct ip_callchain *callchain = sample->callchain;
|
|
|
|
if (perf_evsel__has_branch_callstack(evsel))
|
|
callchain__lbr_callstack_printf(sample);
|
|
|
|
printf("... FP chain: nr:%" PRIu64 "\n", callchain->nr);
|
|
|
|
for (i = 0; i < callchain->nr; i++)
|
|
printf("..... %2d: %016" PRIx64 "\n",
|
|
i, callchain->ips[i]);
|
|
}
|
|
|
|
static void branch_stack__printf(struct perf_sample *sample)
|
|
{
|
|
uint64_t i;
|
|
|
|
printf("... branch stack: nr:%" PRIu64 "\n", sample->branch_stack->nr);
|
|
|
|
for (i = 0; i < sample->branch_stack->nr; i++) {
|
|
struct branch_entry *e = &sample->branch_stack->entries[i];
|
|
|
|
printf("..... %2"PRIu64": %016" PRIx64 " -> %016" PRIx64 " %hu cycles %s%s%s%s %x\n",
|
|
i, e->from, e->to,
|
|
(unsigned short)e->flags.cycles,
|
|
e->flags.mispred ? "M" : " ",
|
|
e->flags.predicted ? "P" : " ",
|
|
e->flags.abort ? "A" : " ",
|
|
e->flags.in_tx ? "T" : " ",
|
|
(unsigned)e->flags.reserved);
|
|
}
|
|
}
|
|
|
|
static void regs_dump__printf(u64 mask, u64 *regs)
|
|
{
|
|
unsigned rid, i = 0;
|
|
|
|
for_each_set_bit(rid, (unsigned long *) &mask, sizeof(mask) * 8) {
|
|
u64 val = regs[i++];
|
|
|
|
printf(".... %-5s 0x%" PRIx64 "\n",
|
|
perf_reg_name(rid), val);
|
|
}
|
|
}
|
|
|
|
static const char *regs_abi[] = {
|
|
[PERF_SAMPLE_REGS_ABI_NONE] = "none",
|
|
[PERF_SAMPLE_REGS_ABI_32] = "32-bit",
|
|
[PERF_SAMPLE_REGS_ABI_64] = "64-bit",
|
|
};
|
|
|
|
static inline const char *regs_dump_abi(struct regs_dump *d)
|
|
{
|
|
if (d->abi > PERF_SAMPLE_REGS_ABI_64)
|
|
return "unknown";
|
|
|
|
return regs_abi[d->abi];
|
|
}
|
|
|
|
static void regs__printf(const char *type, struct regs_dump *regs)
|
|
{
|
|
u64 mask = regs->mask;
|
|
|
|
printf("... %s regs: mask 0x%" PRIx64 " ABI %s\n",
|
|
type,
|
|
mask,
|
|
regs_dump_abi(regs));
|
|
|
|
regs_dump__printf(mask, regs->regs);
|
|
}
|
|
|
|
static void regs_user__printf(struct perf_sample *sample)
|
|
{
|
|
struct regs_dump *user_regs = &sample->user_regs;
|
|
|
|
if (user_regs->regs)
|
|
regs__printf("user", user_regs);
|
|
}
|
|
|
|
static void regs_intr__printf(struct perf_sample *sample)
|
|
{
|
|
struct regs_dump *intr_regs = &sample->intr_regs;
|
|
|
|
if (intr_regs->regs)
|
|
regs__printf("intr", intr_regs);
|
|
}
|
|
|
|
static void stack_user__printf(struct stack_dump *dump)
|
|
{
|
|
printf("... ustack: size %" PRIu64 ", offset 0x%x\n",
|
|
dump->size, dump->offset);
|
|
}
|
|
|
|
static void perf_evlist__print_tstamp(struct perf_evlist *evlist,
|
|
union perf_event *event,
|
|
struct perf_sample *sample)
|
|
{
|
|
u64 sample_type = __perf_evlist__combined_sample_type(evlist);
|
|
|
|
if (event->header.type != PERF_RECORD_SAMPLE &&
|
|
!perf_evlist__sample_id_all(evlist)) {
|
|
fputs("-1 -1 ", stdout);
|
|
return;
|
|
}
|
|
|
|
if ((sample_type & PERF_SAMPLE_CPU))
|
|
printf("%u ", sample->cpu);
|
|
|
|
if (sample_type & PERF_SAMPLE_TIME)
|
|
printf("%" PRIu64 " ", sample->time);
|
|
}
|
|
|
|
static void sample_read__printf(struct perf_sample *sample, u64 read_format)
|
|
{
|
|
printf("... sample_read:\n");
|
|
|
|
if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED)
|
|
printf("...... time enabled %016" PRIx64 "\n",
|
|
sample->read.time_enabled);
|
|
|
|
if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING)
|
|
printf("...... time running %016" PRIx64 "\n",
|
|
sample->read.time_running);
|
|
|
|
if (read_format & PERF_FORMAT_GROUP) {
|
|
u64 i;
|
|
|
|
printf(".... group nr %" PRIu64 "\n", sample->read.group.nr);
|
|
|
|
for (i = 0; i < sample->read.group.nr; i++) {
|
|
struct sample_read_value *value;
|
|
|
|
value = &sample->read.group.values[i];
|
|
printf("..... id %016" PRIx64
|
|
", value %016" PRIx64 "\n",
|
|
value->id, value->value);
|
|
}
|
|
} else
|
|
printf("..... id %016" PRIx64 ", value %016" PRIx64 "\n",
|
|
sample->read.one.id, sample->read.one.value);
|
|
}
|
|
|
|
static void dump_event(struct perf_evlist *evlist, union perf_event *event,
|
|
u64 file_offset, struct perf_sample *sample)
|
|
{
|
|
if (!dump_trace)
|
|
return;
|
|
|
|
printf("\n%#" PRIx64 " [%#x]: event: %d\n",
|
|
file_offset, event->header.size, event->header.type);
|
|
|
|
trace_event(event);
|
|
if (event->header.type == PERF_RECORD_SAMPLE && evlist->trace_event_sample_raw)
|
|
evlist->trace_event_sample_raw(evlist, event, sample);
|
|
|
|
if (sample)
|
|
perf_evlist__print_tstamp(evlist, event, sample);
|
|
|
|
printf("%#" PRIx64 " [%#x]: PERF_RECORD_%s", file_offset,
|
|
event->header.size, perf_event__name(event->header.type));
|
|
}
|
|
|
|
static void dump_sample(struct perf_evsel *evsel, union perf_event *event,
|
|
struct perf_sample *sample)
|
|
{
|
|
u64 sample_type;
|
|
|
|
if (!dump_trace)
|
|
return;
|
|
|
|
printf("(IP, 0x%x): %d/%d: %#" PRIx64 " period: %" PRIu64 " addr: %#" PRIx64 "\n",
|
|
event->header.misc, sample->pid, sample->tid, sample->ip,
|
|
sample->period, sample->addr);
|
|
|
|
sample_type = evsel->attr.sample_type;
|
|
|
|
if (evsel__has_callchain(evsel))
|
|
callchain__printf(evsel, sample);
|
|
|
|
if ((sample_type & PERF_SAMPLE_BRANCH_STACK) && !perf_evsel__has_branch_callstack(evsel))
|
|
branch_stack__printf(sample);
|
|
|
|
if (sample_type & PERF_SAMPLE_REGS_USER)
|
|
regs_user__printf(sample);
|
|
|
|
if (sample_type & PERF_SAMPLE_REGS_INTR)
|
|
regs_intr__printf(sample);
|
|
|
|
if (sample_type & PERF_SAMPLE_STACK_USER)
|
|
stack_user__printf(&sample->user_stack);
|
|
|
|
if (sample_type & PERF_SAMPLE_WEIGHT)
|
|
printf("... weight: %" PRIu64 "\n", sample->weight);
|
|
|
|
if (sample_type & PERF_SAMPLE_DATA_SRC)
|
|
printf(" . data_src: 0x%"PRIx64"\n", sample->data_src);
|
|
|
|
if (sample_type & PERF_SAMPLE_PHYS_ADDR)
|
|
printf(" .. phys_addr: 0x%"PRIx64"\n", sample->phys_addr);
|
|
|
|
if (sample_type & PERF_SAMPLE_TRANSACTION)
|
|
printf("... transaction: %" PRIx64 "\n", sample->transaction);
|
|
|
|
if (sample_type & PERF_SAMPLE_READ)
|
|
sample_read__printf(sample, evsel->attr.read_format);
|
|
}
|
|
|
|
static void dump_read(struct perf_evsel *evsel, union perf_event *event)
|
|
{
|
|
struct read_event *read_event = &event->read;
|
|
u64 read_format;
|
|
|
|
if (!dump_trace)
|
|
return;
|
|
|
|
printf(": %d %d %s %" PRIu64 "\n", event->read.pid, event->read.tid,
|
|
evsel ? perf_evsel__name(evsel) : "FAIL",
|
|
event->read.value);
|
|
|
|
read_format = evsel->attr.read_format;
|
|
|
|
if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED)
|
|
printf("... time enabled : %" PRIu64 "\n", read_event->time_enabled);
|
|
|
|
if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING)
|
|
printf("... time running : %" PRIu64 "\n", read_event->time_running);
|
|
|
|
if (read_format & PERF_FORMAT_ID)
|
|
printf("... id : %" PRIu64 "\n", read_event->id);
|
|
}
|
|
|
|
static struct machine *machines__find_for_cpumode(struct machines *machines,
|
|
union perf_event *event,
|
|
struct perf_sample *sample)
|
|
{
|
|
struct machine *machine;
|
|
|
|
if (perf_guest &&
|
|
((sample->cpumode == PERF_RECORD_MISC_GUEST_KERNEL) ||
|
|
(sample->cpumode == PERF_RECORD_MISC_GUEST_USER))) {
|
|
u32 pid;
|
|
|
|
if (event->header.type == PERF_RECORD_MMAP
|
|
|| event->header.type == PERF_RECORD_MMAP2)
|
|
pid = event->mmap.pid;
|
|
else
|
|
pid = sample->pid;
|
|
|
|
machine = machines__find(machines, pid);
|
|
if (!machine)
|
|
machine = machines__findnew(machines, DEFAULT_GUEST_KERNEL_ID);
|
|
return machine;
|
|
}
|
|
|
|
return &machines->host;
|
|
}
|
|
|
|
static int deliver_sample_value(struct perf_evlist *evlist,
|
|
struct perf_tool *tool,
|
|
union perf_event *event,
|
|
struct perf_sample *sample,
|
|
struct sample_read_value *v,
|
|
struct machine *machine)
|
|
{
|
|
struct perf_sample_id *sid = perf_evlist__id2sid(evlist, v->id);
|
|
|
|
if (sid) {
|
|
sample->id = v->id;
|
|
sample->period = v->value - sid->period;
|
|
sid->period = v->value;
|
|
}
|
|
|
|
if (!sid || sid->evsel == NULL) {
|
|
++evlist->stats.nr_unknown_id;
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* There's no reason to deliver sample
|
|
* for zero period, bail out.
|
|
*/
|
|
if (!sample->period)
|
|
return 0;
|
|
|
|
return tool->sample(tool, event, sample, sid->evsel, machine);
|
|
}
|
|
|
|
static int deliver_sample_group(struct perf_evlist *evlist,
|
|
struct perf_tool *tool,
|
|
union perf_event *event,
|
|
struct perf_sample *sample,
|
|
struct machine *machine)
|
|
{
|
|
int ret = -EINVAL;
|
|
u64 i;
|
|
|
|
for (i = 0; i < sample->read.group.nr; i++) {
|
|
ret = deliver_sample_value(evlist, tool, event, sample,
|
|
&sample->read.group.values[i],
|
|
machine);
|
|
if (ret)
|
|
break;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int
|
|
perf_evlist__deliver_sample(struct perf_evlist *evlist,
|
|
struct perf_tool *tool,
|
|
union perf_event *event,
|
|
struct perf_sample *sample,
|
|
struct perf_evsel *evsel,
|
|
struct machine *machine)
|
|
{
|
|
/* We know evsel != NULL. */
|
|
u64 sample_type = evsel->attr.sample_type;
|
|
u64 read_format = evsel->attr.read_format;
|
|
|
|
/* Standard sample delivery. */
|
|
if (!(sample_type & PERF_SAMPLE_READ))
|
|
return tool->sample(tool, event, sample, evsel, machine);
|
|
|
|
/* For PERF_SAMPLE_READ we have either single or group mode. */
|
|
if (read_format & PERF_FORMAT_GROUP)
|
|
return deliver_sample_group(evlist, tool, event, sample,
|
|
machine);
|
|
else
|
|
return deliver_sample_value(evlist, tool, event, sample,
|
|
&sample->read.one, machine);
|
|
}
|
|
|
|
static int machines__deliver_event(struct machines *machines,
|
|
struct perf_evlist *evlist,
|
|
union perf_event *event,
|
|
struct perf_sample *sample,
|
|
struct perf_tool *tool, u64 file_offset)
|
|
{
|
|
struct perf_evsel *evsel;
|
|
struct machine *machine;
|
|
|
|
dump_event(evlist, event, file_offset, sample);
|
|
|
|
evsel = perf_evlist__id2evsel(evlist, sample->id);
|
|
|
|
machine = machines__find_for_cpumode(machines, event, sample);
|
|
|
|
switch (event->header.type) {
|
|
case PERF_RECORD_SAMPLE:
|
|
if (evsel == NULL) {
|
|
++evlist->stats.nr_unknown_id;
|
|
return 0;
|
|
}
|
|
dump_sample(evsel, event, sample);
|
|
if (machine == NULL) {
|
|
++evlist->stats.nr_unprocessable_samples;
|
|
return 0;
|
|
}
|
|
return perf_evlist__deliver_sample(evlist, tool, event, sample, evsel, machine);
|
|
case PERF_RECORD_MMAP:
|
|
return tool->mmap(tool, event, sample, machine);
|
|
case PERF_RECORD_MMAP2:
|
|
if (event->header.misc & PERF_RECORD_MISC_PROC_MAP_PARSE_TIMEOUT)
|
|
++evlist->stats.nr_proc_map_timeout;
|
|
return tool->mmap2(tool, event, sample, machine);
|
|
case PERF_RECORD_COMM:
|
|
return tool->comm(tool, event, sample, machine);
|
|
case PERF_RECORD_NAMESPACES:
|
|
return tool->namespaces(tool, event, sample, machine);
|
|
case PERF_RECORD_FORK:
|
|
return tool->fork(tool, event, sample, machine);
|
|
case PERF_RECORD_EXIT:
|
|
return tool->exit(tool, event, sample, machine);
|
|
case PERF_RECORD_LOST:
|
|
if (tool->lost == perf_event__process_lost)
|
|
evlist->stats.total_lost += event->lost.lost;
|
|
return tool->lost(tool, event, sample, machine);
|
|
case PERF_RECORD_LOST_SAMPLES:
|
|
if (tool->lost_samples == perf_event__process_lost_samples)
|
|
evlist->stats.total_lost_samples += event->lost_samples.lost;
|
|
return tool->lost_samples(tool, event, sample, machine);
|
|
case PERF_RECORD_READ:
|
|
dump_read(evsel, event);
|
|
return tool->read(tool, event, sample, evsel, machine);
|
|
case PERF_RECORD_THROTTLE:
|
|
return tool->throttle(tool, event, sample, machine);
|
|
case PERF_RECORD_UNTHROTTLE:
|
|
return tool->unthrottle(tool, event, sample, machine);
|
|
case PERF_RECORD_AUX:
|
|
if (tool->aux == perf_event__process_aux) {
|
|
if (event->aux.flags & PERF_AUX_FLAG_TRUNCATED)
|
|
evlist->stats.total_aux_lost += 1;
|
|
if (event->aux.flags & PERF_AUX_FLAG_PARTIAL)
|
|
evlist->stats.total_aux_partial += 1;
|
|
}
|
|
return tool->aux(tool, event, sample, machine);
|
|
case PERF_RECORD_ITRACE_START:
|
|
return tool->itrace_start(tool, event, sample, machine);
|
|
case PERF_RECORD_SWITCH:
|
|
case PERF_RECORD_SWITCH_CPU_WIDE:
|
|
return tool->context_switch(tool, event, sample, machine);
|
|
case PERF_RECORD_KSYMBOL:
|
|
return tool->ksymbol(tool, event, sample, machine);
|
|
case PERF_RECORD_BPF_EVENT:
|
|
return tool->bpf_event(tool, event, sample, machine);
|
|
default:
|
|
++evlist->stats.nr_unknown_events;
|
|
return -1;
|
|
}
|
|
}
|
|
|
|
static int perf_session__deliver_event(struct perf_session *session,
|
|
union perf_event *event,
|
|
struct perf_tool *tool,
|
|
u64 file_offset)
|
|
{
|
|
struct perf_sample sample;
|
|
int ret;
|
|
|
|
ret = perf_evlist__parse_sample(session->evlist, event, &sample);
|
|
if (ret) {
|
|
pr_err("Can't parse sample, err = %d\n", ret);
|
|
return ret;
|
|
}
|
|
|
|
ret = auxtrace__process_event(session, event, &sample, tool);
|
|
if (ret < 0)
|
|
return ret;
|
|
if (ret > 0)
|
|
return 0;
|
|
|
|
return machines__deliver_event(&session->machines, session->evlist,
|
|
event, &sample, tool, file_offset);
|
|
}
|
|
|
|
static s64 perf_session__process_user_event(struct perf_session *session,
|
|
union perf_event *event,
|
|
u64 file_offset)
|
|
{
|
|
struct ordered_events *oe = &session->ordered_events;
|
|
struct perf_tool *tool = session->tool;
|
|
struct perf_sample sample = { .time = 0, };
|
|
int fd = perf_data__fd(session->data);
|
|
int err;
|
|
|
|
dump_event(session->evlist, event, file_offset, &sample);
|
|
|
|
/* These events are processed right away */
|
|
switch (event->header.type) {
|
|
case PERF_RECORD_HEADER_ATTR:
|
|
err = tool->attr(tool, event, &session->evlist);
|
|
if (err == 0) {
|
|
perf_session__set_id_hdr_size(session);
|
|
perf_session__set_comm_exec(session);
|
|
}
|
|
return err;
|
|
case PERF_RECORD_EVENT_UPDATE:
|
|
return tool->event_update(tool, event, &session->evlist);
|
|
case PERF_RECORD_HEADER_EVENT_TYPE:
|
|
/*
|
|
* Depreceated, but we need to handle it for sake
|
|
* of old data files create in pipe mode.
|
|
*/
|
|
return 0;
|
|
case PERF_RECORD_HEADER_TRACING_DATA:
|
|
/* setup for reading amidst mmap */
|
|
lseek(fd, file_offset, SEEK_SET);
|
|
return tool->tracing_data(session, event);
|
|
case PERF_RECORD_HEADER_BUILD_ID:
|
|
return tool->build_id(session, event);
|
|
case PERF_RECORD_FINISHED_ROUND:
|
|
return tool->finished_round(tool, event, oe);
|
|
case PERF_RECORD_ID_INDEX:
|
|
return tool->id_index(session, event);
|
|
case PERF_RECORD_AUXTRACE_INFO:
|
|
return tool->auxtrace_info(session, event);
|
|
case PERF_RECORD_AUXTRACE:
|
|
/* setup for reading amidst mmap */
|
|
lseek(fd, file_offset + event->header.size, SEEK_SET);
|
|
return tool->auxtrace(session, event);
|
|
case PERF_RECORD_AUXTRACE_ERROR:
|
|
perf_session__auxtrace_error_inc(session, event);
|
|
return tool->auxtrace_error(session, event);
|
|
case PERF_RECORD_THREAD_MAP:
|
|
return tool->thread_map(session, event);
|
|
case PERF_RECORD_CPU_MAP:
|
|
return tool->cpu_map(session, event);
|
|
case PERF_RECORD_STAT_CONFIG:
|
|
return tool->stat_config(session, event);
|
|
case PERF_RECORD_STAT:
|
|
return tool->stat(session, event);
|
|
case PERF_RECORD_STAT_ROUND:
|
|
return tool->stat_round(session, event);
|
|
case PERF_RECORD_TIME_CONV:
|
|
session->time_conv = event->time_conv;
|
|
return tool->time_conv(session, event);
|
|
case PERF_RECORD_HEADER_FEATURE:
|
|
return tool->feature(session, event);
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
}
|
|
|
|
int perf_session__deliver_synth_event(struct perf_session *session,
|
|
union perf_event *event,
|
|
struct perf_sample *sample)
|
|
{
|
|
struct perf_evlist *evlist = session->evlist;
|
|
struct perf_tool *tool = session->tool;
|
|
|
|
events_stats__inc(&evlist->stats, event->header.type);
|
|
|
|
if (event->header.type >= PERF_RECORD_USER_TYPE_START)
|
|
return perf_session__process_user_event(session, event, 0);
|
|
|
|
return machines__deliver_event(&session->machines, evlist, event, sample, tool, 0);
|
|
}
|
|
|
|
static void event_swap(union perf_event *event, bool sample_id_all)
|
|
{
|
|
perf_event__swap_op swap;
|
|
|
|
swap = perf_event__swap_ops[event->header.type];
|
|
if (swap)
|
|
swap(event, sample_id_all);
|
|
}
|
|
|
|
int perf_session__peek_event(struct perf_session *session, off_t file_offset,
|
|
void *buf, size_t buf_sz,
|
|
union perf_event **event_ptr,
|
|
struct perf_sample *sample)
|
|
{
|
|
union perf_event *event;
|
|
size_t hdr_sz, rest;
|
|
int fd;
|
|
|
|
if (session->one_mmap && !session->header.needs_swap) {
|
|
event = file_offset - session->one_mmap_offset +
|
|
session->one_mmap_addr;
|
|
goto out_parse_sample;
|
|
}
|
|
|
|
if (perf_data__is_pipe(session->data))
|
|
return -1;
|
|
|
|
fd = perf_data__fd(session->data);
|
|
hdr_sz = sizeof(struct perf_event_header);
|
|
|
|
if (buf_sz < hdr_sz)
|
|
return -1;
|
|
|
|
if (lseek(fd, file_offset, SEEK_SET) == (off_t)-1 ||
|
|
readn(fd, buf, hdr_sz) != (ssize_t)hdr_sz)
|
|
return -1;
|
|
|
|
event = (union perf_event *)buf;
|
|
|
|
if (session->header.needs_swap)
|
|
perf_event_header__bswap(&event->header);
|
|
|
|
if (event->header.size < hdr_sz || event->header.size > buf_sz)
|
|
return -1;
|
|
|
|
rest = event->header.size - hdr_sz;
|
|
|
|
if (readn(fd, buf, rest) != (ssize_t)rest)
|
|
return -1;
|
|
|
|
if (session->header.needs_swap)
|
|
event_swap(event, perf_evlist__sample_id_all(session->evlist));
|
|
|
|
out_parse_sample:
|
|
|
|
if (sample && event->header.type < PERF_RECORD_USER_TYPE_START &&
|
|
perf_evlist__parse_sample(session->evlist, event, sample))
|
|
return -1;
|
|
|
|
*event_ptr = event;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static s64 perf_session__process_event(struct perf_session *session,
|
|
union perf_event *event, u64 file_offset)
|
|
{
|
|
struct perf_evlist *evlist = session->evlist;
|
|
struct perf_tool *tool = session->tool;
|
|
int ret;
|
|
|
|
if (session->header.needs_swap)
|
|
event_swap(event, perf_evlist__sample_id_all(evlist));
|
|
|
|
if (event->header.type >= PERF_RECORD_HEADER_MAX)
|
|
return -EINVAL;
|
|
|
|
events_stats__inc(&evlist->stats, event->header.type);
|
|
|
|
if (event->header.type >= PERF_RECORD_USER_TYPE_START)
|
|
return perf_session__process_user_event(session, event, file_offset);
|
|
|
|
if (tool->ordered_events) {
|
|
u64 timestamp = -1ULL;
|
|
|
|
ret = perf_evlist__parse_sample_timestamp(evlist, event, ×tamp);
|
|
if (ret && ret != -1)
|
|
return ret;
|
|
|
|
ret = perf_session__queue_event(session, event, timestamp, file_offset);
|
|
if (ret != -ETIME)
|
|
return ret;
|
|
}
|
|
|
|
return perf_session__deliver_event(session, event, tool, file_offset);
|
|
}
|
|
|
|
void perf_event_header__bswap(struct perf_event_header *hdr)
|
|
{
|
|
hdr->type = bswap_32(hdr->type);
|
|
hdr->misc = bswap_16(hdr->misc);
|
|
hdr->size = bswap_16(hdr->size);
|
|
}
|
|
|
|
struct thread *perf_session__findnew(struct perf_session *session, pid_t pid)
|
|
{
|
|
return machine__findnew_thread(&session->machines.host, -1, pid);
|
|
}
|
|
|
|
/*
|
|
* Threads are identified by pid and tid, and the idle task has pid == tid == 0.
|
|
* So here a single thread is created for that, but actually there is a separate
|
|
* idle task per cpu, so there should be one 'struct thread' per cpu, but there
|
|
* is only 1. That causes problems for some tools, requiring workarounds. For
|
|
* example get_idle_thread() in builtin-sched.c, or thread_stack__per_cpu().
|
|
*/
|
|
int perf_session__register_idle_thread(struct perf_session *session)
|
|
{
|
|
struct thread *thread;
|
|
int err = 0;
|
|
|
|
thread = machine__findnew_thread(&session->machines.host, 0, 0);
|
|
if (thread == NULL || thread__set_comm(thread, "swapper", 0)) {
|
|
pr_err("problem inserting idle task.\n");
|
|
err = -1;
|
|
}
|
|
|
|
if (thread == NULL || thread__set_namespaces(thread, 0, NULL)) {
|
|
pr_err("problem inserting idle task.\n");
|
|
err = -1;
|
|
}
|
|
|
|
/* machine__findnew_thread() got the thread, so put it */
|
|
thread__put(thread);
|
|
return err;
|
|
}
|
|
|
|
static void
|
|
perf_session__warn_order(const struct perf_session *session)
|
|
{
|
|
const struct ordered_events *oe = &session->ordered_events;
|
|
struct perf_evsel *evsel;
|
|
bool should_warn = true;
|
|
|
|
evlist__for_each_entry(session->evlist, evsel) {
|
|
if (evsel->attr.write_backward)
|
|
should_warn = false;
|
|
}
|
|
|
|
if (!should_warn)
|
|
return;
|
|
if (oe->nr_unordered_events != 0)
|
|
ui__warning("%u out of order events recorded.\n", oe->nr_unordered_events);
|
|
}
|
|
|
|
static void perf_session__warn_about_errors(const struct perf_session *session)
|
|
{
|
|
const struct events_stats *stats = &session->evlist->stats;
|
|
|
|
if (session->tool->lost == perf_event__process_lost &&
|
|
stats->nr_events[PERF_RECORD_LOST] != 0) {
|
|
ui__warning("Processed %d events and lost %d chunks!\n\n"
|
|
"Check IO/CPU overload!\n\n",
|
|
stats->nr_events[0],
|
|
stats->nr_events[PERF_RECORD_LOST]);
|
|
}
|
|
|
|
if (session->tool->lost_samples == perf_event__process_lost_samples) {
|
|
double drop_rate;
|
|
|
|
drop_rate = (double)stats->total_lost_samples /
|
|
(double) (stats->nr_events[PERF_RECORD_SAMPLE] + stats->total_lost_samples);
|
|
if (drop_rate > 0.05) {
|
|
ui__warning("Processed %" PRIu64 " samples and lost %3.2f%%!\n\n",
|
|
stats->nr_events[PERF_RECORD_SAMPLE] + stats->total_lost_samples,
|
|
drop_rate * 100.0);
|
|
}
|
|
}
|
|
|
|
if (session->tool->aux == perf_event__process_aux &&
|
|
stats->total_aux_lost != 0) {
|
|
ui__warning("AUX data lost %" PRIu64 " times out of %u!\n\n",
|
|
stats->total_aux_lost,
|
|
stats->nr_events[PERF_RECORD_AUX]);
|
|
}
|
|
|
|
if (session->tool->aux == perf_event__process_aux &&
|
|
stats->total_aux_partial != 0) {
|
|
bool vmm_exclusive = false;
|
|
|
|
(void)sysfs__read_bool("module/kvm_intel/parameters/vmm_exclusive",
|
|
&vmm_exclusive);
|
|
|
|
ui__warning("AUX data had gaps in it %" PRIu64 " times out of %u!\n\n"
|
|
"Are you running a KVM guest in the background?%s\n\n",
|
|
stats->total_aux_partial,
|
|
stats->nr_events[PERF_RECORD_AUX],
|
|
vmm_exclusive ?
|
|
"\nReloading kvm_intel module with vmm_exclusive=0\n"
|
|
"will reduce the gaps to only guest's timeslices." :
|
|
"");
|
|
}
|
|
|
|
if (stats->nr_unknown_events != 0) {
|
|
ui__warning("Found %u unknown events!\n\n"
|
|
"Is this an older tool processing a perf.data "
|
|
"file generated by a more recent tool?\n\n"
|
|
"If that is not the case, consider "
|
|
"reporting to linux-kernel@vger.kernel.org.\n\n",
|
|
stats->nr_unknown_events);
|
|
}
|
|
|
|
if (stats->nr_unknown_id != 0) {
|
|
ui__warning("%u samples with id not present in the header\n",
|
|
stats->nr_unknown_id);
|
|
}
|
|
|
|
if (stats->nr_invalid_chains != 0) {
|
|
ui__warning("Found invalid callchains!\n\n"
|
|
"%u out of %u events were discarded for this reason.\n\n"
|
|
"Consider reporting to linux-kernel@vger.kernel.org.\n\n",
|
|
stats->nr_invalid_chains,
|
|
stats->nr_events[PERF_RECORD_SAMPLE]);
|
|
}
|
|
|
|
if (stats->nr_unprocessable_samples != 0) {
|
|
ui__warning("%u unprocessable samples recorded.\n"
|
|
"Do you have a KVM guest running and not using 'perf kvm'?\n",
|
|
stats->nr_unprocessable_samples);
|
|
}
|
|
|
|
perf_session__warn_order(session);
|
|
|
|
events_stats__auxtrace_error_warn(stats);
|
|
|
|
if (stats->nr_proc_map_timeout != 0) {
|
|
ui__warning("%d map information files for pre-existing threads were\n"
|
|
"not processed, if there are samples for addresses they\n"
|
|
"will not be resolved, you may find out which are these\n"
|
|
"threads by running with -v and redirecting the output\n"
|
|
"to a file.\n"
|
|
"The time limit to process proc map is too short?\n"
|
|
"Increase it by --proc-map-timeout\n",
|
|
stats->nr_proc_map_timeout);
|
|
}
|
|
}
|
|
|
|
static int perf_session__flush_thread_stack(struct thread *thread,
|
|
void *p __maybe_unused)
|
|
{
|
|
return thread_stack__flush(thread);
|
|
}
|
|
|
|
static int perf_session__flush_thread_stacks(struct perf_session *session)
|
|
{
|
|
return machines__for_each_thread(&session->machines,
|
|
perf_session__flush_thread_stack,
|
|
NULL);
|
|
}
|
|
|
|
volatile int session_done;
|
|
|
|
static int __perf_session__process_pipe_events(struct perf_session *session)
|
|
{
|
|
struct ordered_events *oe = &session->ordered_events;
|
|
struct perf_tool *tool = session->tool;
|
|
int fd = perf_data__fd(session->data);
|
|
union perf_event *event;
|
|
uint32_t size, cur_size = 0;
|
|
void *buf = NULL;
|
|
s64 skip = 0;
|
|
u64 head;
|
|
ssize_t err;
|
|
void *p;
|
|
|
|
perf_tool__fill_defaults(tool);
|
|
|
|
head = 0;
|
|
cur_size = sizeof(union perf_event);
|
|
|
|
buf = malloc(cur_size);
|
|
if (!buf)
|
|
return -errno;
|
|
ordered_events__set_copy_on_queue(oe, true);
|
|
more:
|
|
event = buf;
|
|
err = readn(fd, event, sizeof(struct perf_event_header));
|
|
if (err <= 0) {
|
|
if (err == 0)
|
|
goto done;
|
|
|
|
pr_err("failed to read event header\n");
|
|
goto out_err;
|
|
}
|
|
|
|
if (session->header.needs_swap)
|
|
perf_event_header__bswap(&event->header);
|
|
|
|
size = event->header.size;
|
|
if (size < sizeof(struct perf_event_header)) {
|
|
pr_err("bad event header size\n");
|
|
goto out_err;
|
|
}
|
|
|
|
if (size > cur_size) {
|
|
void *new = realloc(buf, size);
|
|
if (!new) {
|
|
pr_err("failed to allocate memory to read event\n");
|
|
goto out_err;
|
|
}
|
|
buf = new;
|
|
cur_size = size;
|
|
event = buf;
|
|
}
|
|
p = event;
|
|
p += sizeof(struct perf_event_header);
|
|
|
|
if (size - sizeof(struct perf_event_header)) {
|
|
err = readn(fd, p, size - sizeof(struct perf_event_header));
|
|
if (err <= 0) {
|
|
if (err == 0) {
|
|
pr_err("unexpected end of event stream\n");
|
|
goto done;
|
|
}
|
|
|
|
pr_err("failed to read event data\n");
|
|
goto out_err;
|
|
}
|
|
}
|
|
|
|
if ((skip = perf_session__process_event(session, event, head)) < 0) {
|
|
pr_err("%#" PRIx64 " [%#x]: failed to process type: %d\n",
|
|
head, event->header.size, event->header.type);
|
|
err = -EINVAL;
|
|
goto out_err;
|
|
}
|
|
|
|
head += size;
|
|
|
|
if (skip > 0)
|
|
head += skip;
|
|
|
|
if (!session_done())
|
|
goto more;
|
|
done:
|
|
/* do the final flush for ordered samples */
|
|
err = ordered_events__flush(oe, OE_FLUSH__FINAL);
|
|
if (err)
|
|
goto out_err;
|
|
err = auxtrace__flush_events(session, tool);
|
|
if (err)
|
|
goto out_err;
|
|
err = perf_session__flush_thread_stacks(session);
|
|
out_err:
|
|
free(buf);
|
|
if (!tool->no_warn)
|
|
perf_session__warn_about_errors(session);
|
|
ordered_events__free(&session->ordered_events);
|
|
auxtrace__free_events(session);
|
|
return err;
|
|
}
|
|
|
|
static union perf_event *
|
|
fetch_mmaped_event(struct perf_session *session,
|
|
u64 head, size_t mmap_size, char *buf)
|
|
{
|
|
union perf_event *event;
|
|
|
|
/*
|
|
* Ensure we have enough space remaining to read
|
|
* the size of the event in the headers.
|
|
*/
|
|
if (head + sizeof(event->header) > mmap_size)
|
|
return NULL;
|
|
|
|
event = (union perf_event *)(buf + head);
|
|
|
|
if (session->header.needs_swap)
|
|
perf_event_header__bswap(&event->header);
|
|
|
|
if (head + event->header.size > mmap_size) {
|
|
/* We're not fetching the event so swap back again */
|
|
if (session->header.needs_swap)
|
|
perf_event_header__bswap(&event->header);
|
|
return NULL;
|
|
}
|
|
|
|
return event;
|
|
}
|
|
|
|
/*
|
|
* On 64bit we can mmap the data file in one go. No need for tiny mmap
|
|
* slices. On 32bit we use 32MB.
|
|
*/
|
|
#if BITS_PER_LONG == 64
|
|
#define MMAP_SIZE ULLONG_MAX
|
|
#define NUM_MMAPS 1
|
|
#else
|
|
#define MMAP_SIZE (32 * 1024 * 1024ULL)
|
|
#define NUM_MMAPS 128
|
|
#endif
|
|
|
|
struct reader;
|
|
|
|
typedef s64 (*reader_cb_t)(struct perf_session *session,
|
|
union perf_event *event,
|
|
u64 file_offset);
|
|
|
|
struct reader {
|
|
int fd;
|
|
u64 data_size;
|
|
u64 data_offset;
|
|
reader_cb_t process;
|
|
};
|
|
|
|
static int
|
|
reader__process_events(struct reader *rd, struct perf_session *session,
|
|
struct ui_progress *prog)
|
|
{
|
|
u64 data_size = rd->data_size;
|
|
u64 head, page_offset, file_offset, file_pos, size;
|
|
int err = 0, mmap_prot, mmap_flags, map_idx = 0;
|
|
size_t mmap_size;
|
|
char *buf, *mmaps[NUM_MMAPS];
|
|
union perf_event *event;
|
|
s64 skip;
|
|
|
|
page_offset = page_size * (rd->data_offset / page_size);
|
|
file_offset = page_offset;
|
|
head = rd->data_offset - page_offset;
|
|
|
|
ui_progress__init_size(prog, data_size, "Processing events...");
|
|
|
|
data_size += rd->data_offset;
|
|
|
|
mmap_size = MMAP_SIZE;
|
|
if (mmap_size > data_size) {
|
|
mmap_size = data_size;
|
|
session->one_mmap = true;
|
|
}
|
|
|
|
memset(mmaps, 0, sizeof(mmaps));
|
|
|
|
mmap_prot = PROT_READ;
|
|
mmap_flags = MAP_SHARED;
|
|
|
|
if (session->header.needs_swap) {
|
|
mmap_prot |= PROT_WRITE;
|
|
mmap_flags = MAP_PRIVATE;
|
|
}
|
|
remap:
|
|
buf = mmap(NULL, mmap_size, mmap_prot, mmap_flags, rd->fd,
|
|
file_offset);
|
|
if (buf == MAP_FAILED) {
|
|
pr_err("failed to mmap file\n");
|
|
err = -errno;
|
|
goto out;
|
|
}
|
|
mmaps[map_idx] = buf;
|
|
map_idx = (map_idx + 1) & (ARRAY_SIZE(mmaps) - 1);
|
|
file_pos = file_offset + head;
|
|
if (session->one_mmap) {
|
|
session->one_mmap_addr = buf;
|
|
session->one_mmap_offset = file_offset;
|
|
}
|
|
|
|
more:
|
|
event = fetch_mmaped_event(session, head, mmap_size, buf);
|
|
if (!event) {
|
|
if (mmaps[map_idx]) {
|
|
munmap(mmaps[map_idx], mmap_size);
|
|
mmaps[map_idx] = NULL;
|
|
}
|
|
|
|
page_offset = page_size * (head / page_size);
|
|
file_offset += page_offset;
|
|
head -= page_offset;
|
|
goto remap;
|
|
}
|
|
|
|
size = event->header.size;
|
|
|
|
skip = -EINVAL;
|
|
|
|
if (size < sizeof(struct perf_event_header) ||
|
|
(skip = rd->process(session, event, file_pos)) < 0) {
|
|
pr_err("%#" PRIx64 " [%#x]: failed to process type: %d [%s]\n",
|
|
file_offset + head, event->header.size,
|
|
event->header.type, strerror(-skip));
|
|
err = skip;
|
|
goto out;
|
|
}
|
|
|
|
if (skip)
|
|
size += skip;
|
|
|
|
head += size;
|
|
file_pos += size;
|
|
|
|
ui_progress__update(prog, size);
|
|
|
|
if (session_done())
|
|
goto out;
|
|
|
|
if (file_pos < data_size)
|
|
goto more;
|
|
|
|
out:
|
|
return err;
|
|
}
|
|
|
|
static s64 process_simple(struct perf_session *session,
|
|
union perf_event *event,
|
|
u64 file_offset)
|
|
{
|
|
return perf_session__process_event(session, event, file_offset);
|
|
}
|
|
|
|
static int __perf_session__process_events(struct perf_session *session)
|
|
{
|
|
struct reader rd = {
|
|
.fd = perf_data__fd(session->data),
|
|
.data_size = session->header.data_size,
|
|
.data_offset = session->header.data_offset,
|
|
.process = process_simple,
|
|
};
|
|
struct ordered_events *oe = &session->ordered_events;
|
|
struct perf_tool *tool = session->tool;
|
|
struct ui_progress prog;
|
|
int err;
|
|
|
|
perf_tool__fill_defaults(tool);
|
|
|
|
if (rd.data_size == 0)
|
|
return -1;
|
|
|
|
ui_progress__init_size(&prog, rd.data_size, "Processing events...");
|
|
|
|
err = reader__process_events(&rd, session, &prog);
|
|
if (err)
|
|
goto out_err;
|
|
/* do the final flush for ordered samples */
|
|
err = ordered_events__flush(oe, OE_FLUSH__FINAL);
|
|
if (err)
|
|
goto out_err;
|
|
err = auxtrace__flush_events(session, tool);
|
|
if (err)
|
|
goto out_err;
|
|
err = perf_session__flush_thread_stacks(session);
|
|
out_err:
|
|
ui_progress__finish();
|
|
if (!tool->no_warn)
|
|
perf_session__warn_about_errors(session);
|
|
/*
|
|
* We may switching perf.data output, make ordered_events
|
|
* reusable.
|
|
*/
|
|
ordered_events__reinit(&session->ordered_events);
|
|
auxtrace__free_events(session);
|
|
session->one_mmap = false;
|
|
return err;
|
|
}
|
|
|
|
int perf_session__process_events(struct perf_session *session)
|
|
{
|
|
if (perf_session__register_idle_thread(session) < 0)
|
|
return -ENOMEM;
|
|
|
|
if (perf_data__is_pipe(session->data))
|
|
return __perf_session__process_pipe_events(session);
|
|
|
|
return __perf_session__process_events(session);
|
|
}
|
|
|
|
bool perf_session__has_traces(struct perf_session *session, const char *msg)
|
|
{
|
|
struct perf_evsel *evsel;
|
|
|
|
evlist__for_each_entry(session->evlist, evsel) {
|
|
if (evsel->attr.type == PERF_TYPE_TRACEPOINT)
|
|
return true;
|
|
}
|
|
|
|
pr_err("No trace sample to read. Did you call 'perf %s'?\n", msg);
|
|
return false;
|
|
}
|
|
|
|
int map__set_kallsyms_ref_reloc_sym(struct map *map, const char *symbol_name, u64 addr)
|
|
{
|
|
char *bracket;
|
|
struct ref_reloc_sym *ref;
|
|
struct kmap *kmap;
|
|
|
|
ref = zalloc(sizeof(struct ref_reloc_sym));
|
|
if (ref == NULL)
|
|
return -ENOMEM;
|
|
|
|
ref->name = strdup(symbol_name);
|
|
if (ref->name == NULL) {
|
|
free(ref);
|
|
return -ENOMEM;
|
|
}
|
|
|
|
bracket = strchr(ref->name, ']');
|
|
if (bracket)
|
|
*bracket = '\0';
|
|
|
|
ref->addr = addr;
|
|
|
|
kmap = map__kmap(map);
|
|
if (kmap)
|
|
kmap->ref_reloc_sym = ref;
|
|
|
|
return 0;
|
|
}
|
|
|
|
size_t perf_session__fprintf_dsos(struct perf_session *session, FILE *fp)
|
|
{
|
|
return machines__fprintf_dsos(&session->machines, fp);
|
|
}
|
|
|
|
size_t perf_session__fprintf_dsos_buildid(struct perf_session *session, FILE *fp,
|
|
bool (skip)(struct dso *dso, int parm), int parm)
|
|
{
|
|
return machines__fprintf_dsos_buildid(&session->machines, fp, skip, parm);
|
|
}
|
|
|
|
size_t perf_session__fprintf_nr_events(struct perf_session *session, FILE *fp)
|
|
{
|
|
size_t ret;
|
|
const char *msg = "";
|
|
|
|
if (perf_header__has_feat(&session->header, HEADER_AUXTRACE))
|
|
msg = " (excludes AUX area (e.g. instruction trace) decoded / synthesized events)";
|
|
|
|
ret = fprintf(fp, "\nAggregated stats:%s\n", msg);
|
|
|
|
ret += events_stats__fprintf(&session->evlist->stats, fp);
|
|
return ret;
|
|
}
|
|
|
|
size_t perf_session__fprintf(struct perf_session *session, FILE *fp)
|
|
{
|
|
/*
|
|
* FIXME: Here we have to actually print all the machines in this
|
|
* session, not just the host...
|
|
*/
|
|
return machine__fprintf(&session->machines.host, fp);
|
|
}
|
|
|
|
struct perf_evsel *perf_session__find_first_evtype(struct perf_session *session,
|
|
unsigned int type)
|
|
{
|
|
struct perf_evsel *pos;
|
|
|
|
evlist__for_each_entry(session->evlist, pos) {
|
|
if (pos->attr.type == type)
|
|
return pos;
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
int perf_session__cpu_bitmap(struct perf_session *session,
|
|
const char *cpu_list, unsigned long *cpu_bitmap)
|
|
{
|
|
int i, err = -1;
|
|
struct cpu_map *map;
|
|
|
|
for (i = 0; i < PERF_TYPE_MAX; ++i) {
|
|
struct perf_evsel *evsel;
|
|
|
|
evsel = perf_session__find_first_evtype(session, i);
|
|
if (!evsel)
|
|
continue;
|
|
|
|
if (!(evsel->attr.sample_type & PERF_SAMPLE_CPU)) {
|
|
pr_err("File does not contain CPU events. "
|
|
"Remove -C option to proceed.\n");
|
|
return -1;
|
|
}
|
|
}
|
|
|
|
map = cpu_map__new(cpu_list);
|
|
if (map == NULL) {
|
|
pr_err("Invalid cpu_list\n");
|
|
return -1;
|
|
}
|
|
|
|
for (i = 0; i < map->nr; i++) {
|
|
int cpu = map->map[i];
|
|
|
|
if (cpu >= MAX_NR_CPUS) {
|
|
pr_err("Requested CPU %d too large. "
|
|
"Consider raising MAX_NR_CPUS\n", cpu);
|
|
goto out_delete_map;
|
|
}
|
|
|
|
set_bit(cpu, cpu_bitmap);
|
|
}
|
|
|
|
err = 0;
|
|
|
|
out_delete_map:
|
|
cpu_map__put(map);
|
|
return err;
|
|
}
|
|
|
|
void perf_session__fprintf_info(struct perf_session *session, FILE *fp,
|
|
bool full)
|
|
{
|
|
if (session == NULL || fp == NULL)
|
|
return;
|
|
|
|
fprintf(fp, "# ========\n");
|
|
perf_header__fprintf_info(session, fp, full);
|
|
fprintf(fp, "# ========\n#\n");
|
|
}
|
|
|
|
|
|
int __perf_session__set_tracepoints_handlers(struct perf_session *session,
|
|
const struct perf_evsel_str_handler *assocs,
|
|
size_t nr_assocs)
|
|
{
|
|
struct perf_evsel *evsel;
|
|
size_t i;
|
|
int err;
|
|
|
|
for (i = 0; i < nr_assocs; i++) {
|
|
/*
|
|
* Adding a handler for an event not in the session,
|
|
* just ignore it.
|
|
*/
|
|
evsel = perf_evlist__find_tracepoint_by_name(session->evlist, assocs[i].name);
|
|
if (evsel == NULL)
|
|
continue;
|
|
|
|
err = -EEXIST;
|
|
if (evsel->handler != NULL)
|
|
goto out;
|
|
evsel->handler = assocs[i].handler;
|
|
}
|
|
|
|
err = 0;
|
|
out:
|
|
return err;
|
|
}
|
|
|
|
int perf_event__process_id_index(struct perf_session *session,
|
|
union perf_event *event)
|
|
{
|
|
struct perf_evlist *evlist = session->evlist;
|
|
struct id_index_event *ie = &event->id_index;
|
|
size_t i, nr, max_nr;
|
|
|
|
max_nr = (ie->header.size - sizeof(struct id_index_event)) /
|
|
sizeof(struct id_index_entry);
|
|
nr = ie->nr;
|
|
if (nr > max_nr)
|
|
return -EINVAL;
|
|
|
|
if (dump_trace)
|
|
fprintf(stdout, " nr: %zu\n", nr);
|
|
|
|
for (i = 0; i < nr; i++) {
|
|
struct id_index_entry *e = &ie->entries[i];
|
|
struct perf_sample_id *sid;
|
|
|
|
if (dump_trace) {
|
|
fprintf(stdout, " ... id: %"PRIu64, e->id);
|
|
fprintf(stdout, " idx: %"PRIu64, e->idx);
|
|
fprintf(stdout, " cpu: %"PRId64, e->cpu);
|
|
fprintf(stdout, " tid: %"PRId64"\n", e->tid);
|
|
}
|
|
|
|
sid = perf_evlist__id2sid(evlist, e->id);
|
|
if (!sid)
|
|
return -ENOENT;
|
|
sid->idx = e->idx;
|
|
sid->cpu = e->cpu;
|
|
sid->tid = e->tid;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
int perf_event__synthesize_id_index(struct perf_tool *tool,
|
|
perf_event__handler_t process,
|
|
struct perf_evlist *evlist,
|
|
struct machine *machine)
|
|
{
|
|
union perf_event *ev;
|
|
struct perf_evsel *evsel;
|
|
size_t nr = 0, i = 0, sz, max_nr, n;
|
|
int err;
|
|
|
|
pr_debug2("Synthesizing id index\n");
|
|
|
|
max_nr = (UINT16_MAX - sizeof(struct id_index_event)) /
|
|
sizeof(struct id_index_entry);
|
|
|
|
evlist__for_each_entry(evlist, evsel)
|
|
nr += evsel->ids;
|
|
|
|
n = nr > max_nr ? max_nr : nr;
|
|
sz = sizeof(struct id_index_event) + n * sizeof(struct id_index_entry);
|
|
ev = zalloc(sz);
|
|
if (!ev)
|
|
return -ENOMEM;
|
|
|
|
ev->id_index.header.type = PERF_RECORD_ID_INDEX;
|
|
ev->id_index.header.size = sz;
|
|
ev->id_index.nr = n;
|
|
|
|
evlist__for_each_entry(evlist, evsel) {
|
|
u32 j;
|
|
|
|
for (j = 0; j < evsel->ids; j++) {
|
|
struct id_index_entry *e;
|
|
struct perf_sample_id *sid;
|
|
|
|
if (i >= n) {
|
|
err = process(tool, ev, NULL, machine);
|
|
if (err)
|
|
goto out_err;
|
|
nr -= n;
|
|
i = 0;
|
|
}
|
|
|
|
e = &ev->id_index.entries[i++];
|
|
|
|
e->id = evsel->id[j];
|
|
|
|
sid = perf_evlist__id2sid(evlist, e->id);
|
|
if (!sid) {
|
|
free(ev);
|
|
return -ENOENT;
|
|
}
|
|
|
|
e->idx = sid->idx;
|
|
e->cpu = sid->cpu;
|
|
e->tid = sid->tid;
|
|
}
|
|
}
|
|
|
|
sz = sizeof(struct id_index_event) + nr * sizeof(struct id_index_entry);
|
|
ev->id_index.header.size = sz;
|
|
ev->id_index.nr = nr;
|
|
|
|
err = process(tool, ev, NULL, machine);
|
|
out_err:
|
|
free(ev);
|
|
|
|
return err;
|
|
}
|