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So that we don't use global variables that could make us misreport event names when having a multi window top, for instance. Cc: David Ahern <dsahern@gmail.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Mike Galbraith <efault@gmx.de> Cc: Namhyung Kim <namhyung@gmail.com> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Stephane Eranian <eranian@google.com> Link: http://lkml.kernel.org/n/tip-mccancovi1u0wdkg8ncth509@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
106 lines
3.2 KiB
C
106 lines
3.2 KiB
C
/*
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* Copyright (C) 2011, Red Hat Inc, Arnaldo Carvalho de Melo <acme@redhat.com>
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*
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* Refactored from builtin-top.c, see that files for further copyright notes.
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*
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* Released under the GPL v2. (and only v2, not any later version)
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*/
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#include "cpumap.h"
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#include "event.h"
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#include "evlist.h"
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#include "evsel.h"
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#include "parse-events.h"
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#include "symbol.h"
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#include "top.h"
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#include <inttypes.h>
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#define SNPRINTF(buf, size, fmt, args...) \
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({ \
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size_t r = snprintf(buf, size, fmt, ## args); \
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r > size ? size : r; \
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})
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size_t perf_top__header_snprintf(struct perf_top *top, char *bf, size_t size)
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{
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float samples_per_sec = top->samples / top->delay_secs;
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float ksamples_per_sec = top->kernel_samples / top->delay_secs;
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float esamples_percent = (100.0 * top->exact_samples) / top->samples;
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size_t ret = 0;
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if (!perf_guest) {
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ret = SNPRINTF(bf, size,
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" PerfTop:%8.0f irqs/sec kernel:%4.1f%%"
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" exact: %4.1f%% [", samples_per_sec,
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100.0 - (100.0 * ((samples_per_sec - ksamples_per_sec) /
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samples_per_sec)),
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esamples_percent);
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} else {
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float us_samples_per_sec = top->us_samples / top->delay_secs;
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float guest_kernel_samples_per_sec = top->guest_kernel_samples / top->delay_secs;
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float guest_us_samples_per_sec = top->guest_us_samples / top->delay_secs;
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ret = SNPRINTF(bf, size,
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" PerfTop:%8.0f irqs/sec kernel:%4.1f%% us:%4.1f%%"
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" guest kernel:%4.1f%% guest us:%4.1f%%"
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" exact: %4.1f%% [", samples_per_sec,
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100.0 - (100.0 * ((samples_per_sec - ksamples_per_sec) /
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samples_per_sec)),
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100.0 - (100.0 * ((samples_per_sec - us_samples_per_sec) /
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samples_per_sec)),
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100.0 - (100.0 * ((samples_per_sec -
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guest_kernel_samples_per_sec) /
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samples_per_sec)),
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100.0 - (100.0 * ((samples_per_sec -
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guest_us_samples_per_sec) /
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samples_per_sec)),
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esamples_percent);
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}
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if (top->evlist->nr_entries == 1) {
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struct perf_evsel *first;
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first = list_entry(top->evlist->entries.next, struct perf_evsel, node);
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ret += SNPRINTF(bf + ret, size - ret, "%" PRIu64 "%s ",
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(uint64_t)first->attr.sample_period,
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top->freq ? "Hz" : "");
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}
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ret += SNPRINTF(bf + ret, size - ret, "%s", perf_evsel__name(top->sym_evsel));
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ret += SNPRINTF(bf + ret, size - ret, "], ");
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if (top->target.pid)
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ret += SNPRINTF(bf + ret, size - ret, " (target_pid: %s",
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top->target.pid);
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else if (top->target.tid)
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ret += SNPRINTF(bf + ret, size - ret, " (target_tid: %s",
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top->target.tid);
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else if (top->target.uid_str != NULL)
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ret += SNPRINTF(bf + ret, size - ret, " (uid: %s",
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top->target.uid_str);
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else
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ret += SNPRINTF(bf + ret, size - ret, " (all");
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if (top->target.cpu_list)
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ret += SNPRINTF(bf + ret, size - ret, ", CPU%s: %s)",
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top->evlist->cpus->nr > 1 ? "s" : "",
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top->target.cpu_list);
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else {
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if (top->target.tid)
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ret += SNPRINTF(bf + ret, size - ret, ")");
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else
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ret += SNPRINTF(bf + ret, size - ret, ", %d CPU%s)",
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top->evlist->cpus->nr,
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top->evlist->cpus->nr > 1 ? "s" : "");
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}
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return ret;
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}
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void perf_top__reset_sample_counters(struct perf_top *top)
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{
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top->samples = top->us_samples = top->kernel_samples =
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top->exact_samples = top->guest_kernel_samples =
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top->guest_us_samples = 0;
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}
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