perf: Do the big rename: Performance Counters -> Performance Events
Bye-bye Performance Counters, welcome Performance Events!
In the past few months the perfcounters subsystem has grown out its
initial role of counting hardware events, and has become (and is
becoming) a much broader generic event enumeration, reporting, logging,
monitoring, analysis facility.
Naming its core object 'perf_counter' and naming the subsystem
'perfcounters' has become more and more of a misnomer. With pending
code like hw-breakpoints support the 'counter' name is less and
less appropriate.
All in one, we've decided to rename the subsystem to 'performance
events' and to propagate this rename through all fields, variables
and API names. (in an ABI compatible fashion)
The word 'event' is also a bit shorter than 'counter' - which makes
it slightly more convenient to write/handle as well.
Thanks goes to Stephane Eranian who first observed this misnomer and
suggested a rename.
User-space tooling and ABI compatibility is not affected - this patch
should be function-invariant. (Also, defconfigs were not touched to
keep the size down.)
This patch has been generated via the following script:
FILES=$(find * -type f | grep -vE 'oprofile|[^K]config')
sed -i \
-e 's/PERF_EVENT_/PERF_RECORD_/g' \
-e 's/PERF_COUNTER/PERF_EVENT/g' \
-e 's/perf_counter/perf_event/g' \
-e 's/nb_counters/nb_events/g' \
-e 's/swcounter/swevent/g' \
-e 's/tpcounter_event/tp_event/g' \
$FILES
for N in $(find . -name perf_counter.[ch]); do
M=$(echo $N | sed 's/perf_counter/perf_event/g')
mv $N $M
done
FILES=$(find . -name perf_event.*)
sed -i \
-e 's/COUNTER_MASK/REG_MASK/g' \
-e 's/COUNTER/EVENT/g' \
-e 's/\<event\>/event_id/g' \
-e 's/counter/event/g' \
-e 's/Counter/Event/g' \
$FILES
... to keep it as correct as possible. This script can also be
used by anyone who has pending perfcounters patches - it converts
a Linux kernel tree over to the new naming. We tried to time this
change to the point in time where the amount of pending patches
is the smallest: the end of the merge window.
Namespace clashes were fixed up in a preparatory patch - and some
stylistic fallout will be fixed up in a subsequent patch.
( NOTE: 'counters' are still the proper terminology when we deal
with hardware registers - and these sed scripts are a bit
over-eager in renaming them. I've undone some of that, but
in case there's something left where 'counter' would be
better than 'event' we can undo that on an individual basis
instead of touching an otherwise nicely automated patch. )
Suggested-by: Stephane Eranian <eranian@google.com>
Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Acked-by: Paul Mackerras <paulus@samba.org>
Reviewed-by: Arjan van de Ven <arjan@linux.intel.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: David Howells <dhowells@redhat.com>
Cc: Kyle McMartin <kyle@mcmartin.ca>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: <linux-arch@vger.kernel.org>
LKML-Reference: <new-submission>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-09-21 18:02:48 +08:00
|
|
|
#ifndef __PERF_RECORD_H
|
|
|
|
#define __PERF_RECORD_H
|
2009-09-25 00:02:18 +08:00
|
|
|
|
2009-08-12 16:19:53 +08:00
|
|
|
#include "../perf.h"
|
2009-08-12 17:07:25 +08:00
|
|
|
#include "util.h"
|
2009-10-02 14:29:58 +08:00
|
|
|
#include <linux/list.h>
|
2009-09-29 01:48:46 +08:00
|
|
|
#include <linux/rbtree.h>
|
2009-08-12 16:19:53 +08:00
|
|
|
|
2009-08-13 17:47:55 +08:00
|
|
|
/*
|
|
|
|
* PERF_SAMPLE_IP | PERF_SAMPLE_TID | *
|
|
|
|
*/
|
2009-08-12 16:19:53 +08:00
|
|
|
struct ip_event {
|
|
|
|
struct perf_event_header header;
|
|
|
|
u64 ip;
|
|
|
|
u32 pid, tid;
|
|
|
|
unsigned char __more_data[];
|
|
|
|
};
|
|
|
|
|
|
|
|
struct mmap_event {
|
|
|
|
struct perf_event_header header;
|
|
|
|
u32 pid, tid;
|
|
|
|
u64 start;
|
|
|
|
u64 len;
|
|
|
|
u64 pgoff;
|
|
|
|
char filename[PATH_MAX];
|
|
|
|
};
|
|
|
|
|
|
|
|
struct comm_event {
|
|
|
|
struct perf_event_header header;
|
|
|
|
u32 pid, tid;
|
|
|
|
char comm[16];
|
|
|
|
};
|
|
|
|
|
|
|
|
struct fork_event {
|
|
|
|
struct perf_event_header header;
|
|
|
|
u32 pid, ppid;
|
|
|
|
u32 tid, ptid;
|
2009-09-12 13:52:47 +08:00
|
|
|
u64 time;
|
2009-08-12 16:19:53 +08:00
|
|
|
};
|
|
|
|
|
|
|
|
struct lost_event {
|
|
|
|
struct perf_event_header header;
|
|
|
|
u64 id;
|
|
|
|
u64 lost;
|
|
|
|
};
|
|
|
|
|
2009-08-13 17:47:55 +08:00
|
|
|
/*
|
|
|
|
* PERF_FORMAT_ENABLED | PERF_FORMAT_RUNNING | PERF_FORMAT_ID
|
|
|
|
*/
|
2009-08-12 16:19:53 +08:00
|
|
|
struct read_event {
|
|
|
|
struct perf_event_header header;
|
2009-09-16 19:45:00 +08:00
|
|
|
u32 pid, tid;
|
2009-08-12 16:19:53 +08:00
|
|
|
u64 value;
|
|
|
|
u64 time_enabled;
|
|
|
|
u64 time_running;
|
|
|
|
u64 id;
|
|
|
|
};
|
|
|
|
|
2009-12-06 19:08:24 +08:00
|
|
|
struct sample_event {
|
2009-09-12 13:53:00 +08:00
|
|
|
struct perf_event_header header;
|
|
|
|
u64 array[];
|
|
|
|
};
|
|
|
|
|
2009-12-06 19:08:24 +08:00
|
|
|
struct sample_data {
|
|
|
|
u64 ip;
|
|
|
|
u32 pid, tid;
|
|
|
|
u64 time;
|
|
|
|
u64 addr;
|
|
|
|
u64 id;
|
|
|
|
u64 stream_id;
|
|
|
|
u32 cpu;
|
|
|
|
u64 period;
|
|
|
|
struct ip_callchain *callchain;
|
|
|
|
u32 raw_size;
|
|
|
|
void *raw_data;
|
|
|
|
};
|
|
|
|
|
perf symbols: Use the buildids if present
With this change 'perf record' will intercept PERF_RECORD_MMAP
calls, creating a linked list of DSOs, then when the session
finishes, it will traverse this list and read the buildids,
stashing them at the end of the file and will set up a new
feature bit in the header bitmask.
'perf report' will then notice this feature and populate the
'dsos' list and set the build ids.
When reading the symtabs it will refuse to load from a file that
doesn't have the same build id. This improves the
reliability of the profiler output, as symbols and profiling
data is more guaranteed to match.
Example:
[root@doppio ~]# perf report | head
/home/acme/bin/perf with build id b1ea544ac3746e7538972548a09aadecc5753868 not found, continuing without symbols
# Samples: 2621434559
#
# Overhead Command Shared Object Symbol
# ........ ............... ............................. ......
#
7.91% init [kernel] [k] read_hpet
7.64% init [kernel] [k] mwait_idle_with_hints
7.60% swapper [kernel] [k] read_hpet
7.60% swapper [kernel] [k] mwait_idle_with_hints
3.65% init [kernel] [k] 0xffffffffa02339d9
[root@doppio ~]#
In this case the 'perf' binary was an older one, vanished,
so its symbols probably wouldn't match or would cause subtly
different (and misleading) output.
Next patches will support the kernel as well, reading the build
id notes for it and the modules from /sys.
Another patch should also introduce a new plumbing command:
'perf list-buildids'
that will then be used in porcelain that is distro specific to
fetch -debuginfo packages where such buildids are present. This
will in turn allow for one to run 'perf record' in one machine
and 'perf report' in another.
Future work on having the buildid sent directly from the kernel
in the PERF_RECORD_MMAP event is needed to close races, as the
DSO can be changed during a 'perf record' session, but this
patch at least helps with non-corner cases and current/older
kernels.
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Ananth N Mavinakayanahalli <ananth@in.ibm.com>
Cc: Christoph Hellwig <hch@infradead.org>
Cc: Frank Ch. Eigler <fche@redhat.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Jason Baron <jbaron@redhat.com>
Cc: Jim Keniston <jkenisto@us.ibm.com>
Cc: K. Prasad <prasad@linux.vnet.ibm.com>
Cc: Masami Hiramatsu <mhiramat@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Roland McGrath <roland@redhat.com>
Cc: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
LKML-Reference: <1257367843-26224-1-git-send-email-acme@infradead.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-11-05 04:50:43 +08:00
|
|
|
#define BUILD_ID_SIZE 20
|
|
|
|
|
|
|
|
struct build_id_event {
|
|
|
|
struct perf_event_header header;
|
|
|
|
u8 build_id[ALIGN(BUILD_ID_SIZE, sizeof(u64))];
|
|
|
|
char filename[];
|
|
|
|
};
|
2009-09-12 13:53:00 +08:00
|
|
|
|
2009-08-12 16:19:53 +08:00
|
|
|
typedef union event_union {
|
|
|
|
struct perf_event_header header;
|
|
|
|
struct ip_event ip;
|
|
|
|
struct mmap_event mmap;
|
|
|
|
struct comm_event comm;
|
|
|
|
struct fork_event fork;
|
|
|
|
struct lost_event lost;
|
|
|
|
struct read_event read;
|
2009-09-12 13:53:00 +08:00
|
|
|
struct sample_event sample;
|
2009-08-12 16:19:53 +08:00
|
|
|
} event_t;
|
2009-08-12 17:07:25 +08:00
|
|
|
|
2009-11-28 02:29:22 +08:00
|
|
|
struct events_stats {
|
|
|
|
unsigned long total;
|
|
|
|
unsigned long lost;
|
|
|
|
};
|
|
|
|
|
|
|
|
void event__print_totals(void);
|
|
|
|
|
2009-11-28 02:29:16 +08:00
|
|
|
enum map_type {
|
2009-11-28 02:29:17 +08:00
|
|
|
MAP__FUNCTION = 0,
|
perf symbols: Add support for 'variable' symtabs
Example:
{
u64 addr = strtoull(sym_filter, NULL, 16);
struct map *map = map_groups__find(kmaps, MAP__VARIABLE, addr);
if (map == NULL)
pr_err("couldn't find map!\n");
else {
struct symbol *sym = map__find_symbol(map, addr, NULL);
if (sym == NULL)
pr_err("couldn't find addr!\n");
else
pr_info("addr %#Lx is in %s global var\n", addr, sym->name);
}
exit(0);
}
Added just after symbol__init() call in 'perf top', then:
{
u64 addr = strtoull(sym_filter, NULL, 16);
struct map *map = map_groups__find(kmaps, MAP__VARIABLE, addr);
if (map == NULL)
pr_err("couldn't find map!\n");
else {
struct symbol *sym = map__find_symbol(map, addr, NULL);
if (sym == NULL)
pr_err("couldn't find addr!\n");
else
pr_info("addr %#Lx is in %s global var\n", addr, sym->name);
}
exit(0);
}
[root@doppio linux-2.6-tip]# grep ' [dD] ' /proc/kallsyms | grep ' sched'
ffffffff817827d8 d sched_nr_latency
ffffffff81782ce0 d sched_domains_mutex
ffffffff8178c070 d schedstr.22423
ffffffff817909a0 d sched_register_mutex
ffffffff81823490 d sched_feat_names
ffffffff81823558 d scheduler_running
ffffffff818235b8 d sched_clock_running
ffffffff818235bc D sched_clock_stable
ffffffff81824f00 d sched_switch_trace
[root@doppio linux-2.6-tip]# perf top -s 0xffffffff817827d9
addr 0xffffffff817827d9 is in sched_nr_latency global var
[root@doppio linux-2.6-tip]# perf top -s ffffffff81782ce0
addr 0xffffffff81782ce0 is in sched_domains_mutex global var
[root@doppio linux-2.6-tip]#
[root@doppio linux-2.6-tip]# perf top -s ffffffff81782ce0 --vmlinux OFF
The file OFF cannot be used, trying to use /proc/kallsyms...addr 0xffffffff81782ce0 is in sched_domains_mutex global var
[root@doppio linux-2.6-tip]# perf top -s ffffffff818235bc --vmlinux OFF
The file OFF cannot be used, trying to use /proc/kallsyms...addr 0xffffffff818235bc is in sched_clock_stable global var
[root@doppio linux-2.6-tip]#
So it works with both /proc/kallsyms and with ELF symtabs, either
the one on the vmlinux explicitely passed via --vmlinux or in one
in the vmlinux_path that matches the buildid for the running kernel
or the one found in the buildid header section in a perf.data file.
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Frédéric Weisbecker <fweisbec@gmail.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Paul Mackerras <paulus@samba.org>
LKML-Reference: <1260550239-5372-4-git-send-email-acme@infradead.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-12-12 00:50:39 +08:00
|
|
|
MAP__VARIABLE,
|
2009-11-28 02:29:16 +08:00
|
|
|
};
|
|
|
|
|
perf symbols: Add support for 'variable' symtabs
Example:
{
u64 addr = strtoull(sym_filter, NULL, 16);
struct map *map = map_groups__find(kmaps, MAP__VARIABLE, addr);
if (map == NULL)
pr_err("couldn't find map!\n");
else {
struct symbol *sym = map__find_symbol(map, addr, NULL);
if (sym == NULL)
pr_err("couldn't find addr!\n");
else
pr_info("addr %#Lx is in %s global var\n", addr, sym->name);
}
exit(0);
}
Added just after symbol__init() call in 'perf top', then:
{
u64 addr = strtoull(sym_filter, NULL, 16);
struct map *map = map_groups__find(kmaps, MAP__VARIABLE, addr);
if (map == NULL)
pr_err("couldn't find map!\n");
else {
struct symbol *sym = map__find_symbol(map, addr, NULL);
if (sym == NULL)
pr_err("couldn't find addr!\n");
else
pr_info("addr %#Lx is in %s global var\n", addr, sym->name);
}
exit(0);
}
[root@doppio linux-2.6-tip]# grep ' [dD] ' /proc/kallsyms | grep ' sched'
ffffffff817827d8 d sched_nr_latency
ffffffff81782ce0 d sched_domains_mutex
ffffffff8178c070 d schedstr.22423
ffffffff817909a0 d sched_register_mutex
ffffffff81823490 d sched_feat_names
ffffffff81823558 d scheduler_running
ffffffff818235b8 d sched_clock_running
ffffffff818235bc D sched_clock_stable
ffffffff81824f00 d sched_switch_trace
[root@doppio linux-2.6-tip]# perf top -s 0xffffffff817827d9
addr 0xffffffff817827d9 is in sched_nr_latency global var
[root@doppio linux-2.6-tip]# perf top -s ffffffff81782ce0
addr 0xffffffff81782ce0 is in sched_domains_mutex global var
[root@doppio linux-2.6-tip]#
[root@doppio linux-2.6-tip]# perf top -s ffffffff81782ce0 --vmlinux OFF
The file OFF cannot be used, trying to use /proc/kallsyms...addr 0xffffffff81782ce0 is in sched_domains_mutex global var
[root@doppio linux-2.6-tip]# perf top -s ffffffff818235bc --vmlinux OFF
The file OFF cannot be used, trying to use /proc/kallsyms...addr 0xffffffff818235bc is in sched_clock_stable global var
[root@doppio linux-2.6-tip]#
So it works with both /proc/kallsyms and with ELF symtabs, either
the one on the vmlinux explicitely passed via --vmlinux or in one
in the vmlinux_path that matches the buildid for the running kernel
or the one found in the buildid header section in a perf.data file.
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Frédéric Weisbecker <fweisbec@gmail.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Paul Mackerras <paulus@samba.org>
LKML-Reference: <1260550239-5372-4-git-send-email-acme@infradead.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-12-12 00:50:39 +08:00
|
|
|
#define MAP__NR_TYPES (MAP__VARIABLE + 1)
|
2009-12-12 00:50:37 +08:00
|
|
|
|
2009-08-12 17:07:25 +08:00
|
|
|
struct map {
|
2009-10-02 14:29:58 +08:00
|
|
|
union {
|
|
|
|
struct rb_node rb_node;
|
|
|
|
struct list_head node;
|
|
|
|
};
|
2009-08-12 17:07:25 +08:00
|
|
|
u64 start;
|
|
|
|
u64 end;
|
2009-11-28 02:29:16 +08:00
|
|
|
enum map_type type;
|
2009-08-12 17:07:25 +08:00
|
|
|
u64 pgoff;
|
|
|
|
u64 (*map_ip)(struct map *, u64);
|
2009-10-20 03:17:57 +08:00
|
|
|
u64 (*unmap_ip)(struct map *, u64);
|
2009-08-12 17:07:25 +08:00
|
|
|
struct dso *dso;
|
|
|
|
};
|
|
|
|
|
|
|
|
static inline u64 map__map_ip(struct map *map, u64 ip)
|
|
|
|
{
|
|
|
|
return ip - map->start + map->pgoff;
|
|
|
|
}
|
|
|
|
|
2009-10-20 03:17:57 +08:00
|
|
|
static inline u64 map__unmap_ip(struct map *map, u64 ip)
|
|
|
|
{
|
|
|
|
return ip + map->start - map->pgoff;
|
|
|
|
}
|
|
|
|
|
|
|
|
static inline u64 identity__map_ip(struct map *map __used, u64 ip)
|
2009-08-12 17:07:25 +08:00
|
|
|
{
|
|
|
|
return ip;
|
|
|
|
}
|
|
|
|
|
2009-10-21 00:25:40 +08:00
|
|
|
struct symbol;
|
|
|
|
|
|
|
|
typedef int (*symbol_filter_t)(struct map *map, struct symbol *sym);
|
|
|
|
|
2009-11-28 02:29:16 +08:00
|
|
|
void map__init(struct map *self, enum map_type type,
|
|
|
|
u64 start, u64 end, u64 pgoff, struct dso *dso);
|
|
|
|
struct map *map__new(struct mmap_event *event, enum map_type,
|
|
|
|
char *cwd, int cwdlen);
|
2009-11-21 06:51:27 +08:00
|
|
|
void map__delete(struct map *self);
|
2009-08-12 17:07:25 +08:00
|
|
|
struct map *map__clone(struct map *self);
|
|
|
|
int map__overlap(struct map *l, struct map *r);
|
|
|
|
size_t map__fprintf(struct map *self, FILE *fp);
|
perf session: Move kmaps to perf_session
There is still some more work to do to disentangle map creation
from DSO loading, but this happens only for the kernel, and for
the early adopters of perf diff, where this disentanglement
matters most, we'll be testing different kernels, so no problem
here.
Further clarification: right now we create the kernel maps for
the various modules and discontiguous kernel text maps when
loading the DSO, we should do it as a two step process, first
creating the maps, for multiple mappings with the same DSO
store, then doing the dso load just once, for the first hit on
one of the maps sharing this DSO backing store.
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Frédéric Weisbecker <fweisbec@gmail.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Paul Mackerras <paulus@samba.org>
LKML-Reference: <1260741029-4430-6-git-send-email-acme@infradead.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-12-14 05:50:29 +08:00
|
|
|
|
|
|
|
struct perf_session;
|
|
|
|
|
|
|
|
struct symbol *map__find_symbol(struct map *self, struct perf_session *session,
|
|
|
|
u64 addr, symbol_filter_t filter);
|
perf symbols: Allow lookups by symbol name too
Configurable via symbol_conf.sort_by_name, so that the cost of an
extra rb_node on all 'struct symbol' instances is not paid by tools
that only want to decode addresses.
How to use it:
symbol_conf.sort_by_name = true;
symbol_init(&symbol_conf);
struct map *map = map_groups__find_by_name(kmaps, MAP__VARIABLE, "[kernel.kallsyms]");
if (map == NULL) {
pr_err("couldn't find map!\n");
kernel_maps__fprintf(stdout);
} else {
struct symbol *sym = map__find_symbol_by_name(map, sym_filter, NULL);
if (sym == NULL)
pr_err("couldn't find symbol %s!\n", sym_filter);
else
pr_info("symbol %s: %#Lx-%#Lx \n", sym_filter, sym->start, sym->end);
}
Looking over the vmlinux/kallsyms is common enough that I'll add a
variable to the upcoming struct perf_session to avoid the need to
use map_groups__find_by_name to get the main vmlinux/kallsyms map.
The above example looks on the 'variable' symtab, but it is just
like that for the functions one.
Also the sort operation is done when we first use
map__find_symbol_by_name, in a lazy way.
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Frédéric Weisbecker <fweisbec@gmail.com>
Cc: Masami Hiramatsu <mhiramat@redhat.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Paul Mackerras <paulus@samba.org>
LKML-Reference: <1260564622-12392-1-git-send-email-acme@infradead.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-12-12 04:50:22 +08:00
|
|
|
struct symbol *map__find_symbol_by_name(struct map *self, const char *name,
|
perf session: Move kmaps to perf_session
There is still some more work to do to disentangle map creation
from DSO loading, but this happens only for the kernel, and for
the early adopters of perf diff, where this disentanglement
matters most, we'll be testing different kernels, so no problem
here.
Further clarification: right now we create the kernel maps for
the various modules and discontiguous kernel text maps when
loading the DSO, we should do it as a two step process, first
creating the maps, for multiple mappings with the same DSO
store, then doing the dso load just once, for the first hit on
one of the maps sharing this DSO backing store.
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Frédéric Weisbecker <fweisbec@gmail.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Paul Mackerras <paulus@samba.org>
LKML-Reference: <1260741029-4430-6-git-send-email-acme@infradead.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-12-14 05:50:29 +08:00
|
|
|
struct perf_session *session,
|
perf symbols: Allow lookups by symbol name too
Configurable via symbol_conf.sort_by_name, so that the cost of an
extra rb_node on all 'struct symbol' instances is not paid by tools
that only want to decode addresses.
How to use it:
symbol_conf.sort_by_name = true;
symbol_init(&symbol_conf);
struct map *map = map_groups__find_by_name(kmaps, MAP__VARIABLE, "[kernel.kallsyms]");
if (map == NULL) {
pr_err("couldn't find map!\n");
kernel_maps__fprintf(stdout);
} else {
struct symbol *sym = map__find_symbol_by_name(map, sym_filter, NULL);
if (sym == NULL)
pr_err("couldn't find symbol %s!\n", sym_filter);
else
pr_info("symbol %s: %#Lx-%#Lx \n", sym_filter, sym->start, sym->end);
}
Looking over the vmlinux/kallsyms is common enough that I'll add a
variable to the upcoming struct perf_session to avoid the need to
use map_groups__find_by_name to get the main vmlinux/kallsyms map.
The above example looks on the 'variable' symtab, but it is just
like that for the functions one.
Also the sort operation is done when we first use
map__find_symbol_by_name, in a lazy way.
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Frédéric Weisbecker <fweisbec@gmail.com>
Cc: Masami Hiramatsu <mhiramat@redhat.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Paul Mackerras <paulus@samba.org>
LKML-Reference: <1260564622-12392-1-git-send-email-acme@infradead.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-12-12 04:50:22 +08:00
|
|
|
symbol_filter_t filter);
|
2009-11-28 02:29:17 +08:00
|
|
|
void map__fixup_start(struct map *self);
|
|
|
|
void map__fixup_end(struct map *self);
|
2009-08-12 17:07:25 +08:00
|
|
|
|
2009-12-14 05:50:24 +08:00
|
|
|
int event__synthesize_thread(pid_t pid,
|
|
|
|
int (*process)(event_t *event,
|
|
|
|
struct perf_session *session),
|
|
|
|
struct perf_session *session);
|
|
|
|
void event__synthesize_threads(int (*process)(event_t *event,
|
|
|
|
struct perf_session *session),
|
|
|
|
struct perf_session *session);
|
2009-10-27 05:23:18 +08:00
|
|
|
|
2009-12-14 05:50:24 +08:00
|
|
|
int event__process_comm(event_t *self, struct perf_session *session);
|
|
|
|
int event__process_lost(event_t *self, struct perf_session *session);
|
|
|
|
int event__process_mmap(event_t *self, struct perf_session *session);
|
|
|
|
int event__process_task(event_t *self, struct perf_session *session);
|
2009-11-28 02:29:22 +08:00
|
|
|
|
perf tools: Consolidate symbol resolving across all tools
Now we have a very high level routine for simple tools to
process IP sample events:
int event__preprocess_sample(const event_t *self,
struct addr_location *al,
symbol_filter_t filter)
It receives the event itself and will insert new threads in the
global threads list and resolve the map and symbol, filling all
this info into the new addr_location struct, so that tools like
annotate and report can further process the event by creating
hist_entries in their specific way (with or without callgraphs,
etc).
It in turn uses the new next layer function:
void thread__find_addr_location(struct thread *self, u8 cpumode,
enum map_type type, u64 addr,
struct addr_location *al,
symbol_filter_t filter)
This one will, given a thread (userspace or the kernel kthread
one), will find the given type (MAP__FUNCTION now, MAP__VARIABLE
too in the near future) at the given cpumode, taking vdsos into
account (userspace hit, but kernel symbol) and will fill all
these details in the addr_location given.
Tools that need a more compact API for plain function
resolution, like 'kmem', can use this other one:
struct symbol *thread__find_function(struct thread *self, u64 addr,
symbol_filter_t filter)
So, to resolve a kernel symbol, that is all the 'kmem' tool
needs, its just a matter of calling:
sym = thread__find_function(kthread, addr, NULL);
The 'filter' parameter is needed because we do lazy
parsing/loading of ELF symtabs or /proc/kallsyms.
With this we remove more code duplication all around, which is
always good, huh? :-)
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Frédéric Weisbecker <fweisbec@gmail.com>
Cc: John Kacur <jkacur@redhat.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Paul Mackerras <paulus@samba.org>
LKML-Reference: <1259346563-12568-12-git-send-email-acme@infradead.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-11-28 02:29:23 +08:00
|
|
|
struct addr_location;
|
2009-12-14 05:50:28 +08:00
|
|
|
int event__preprocess_sample(const event_t *self, struct perf_session *session,
|
|
|
|
struct addr_location *al, symbol_filter_t filter);
|
2009-12-06 19:08:24 +08:00
|
|
|
int event__parse_sample(event_t *event, u64 type, struct sample_data *data);
|
perf tools: Consolidate symbol resolving across all tools
Now we have a very high level routine for simple tools to
process IP sample events:
int event__preprocess_sample(const event_t *self,
struct addr_location *al,
symbol_filter_t filter)
It receives the event itself and will insert new threads in the
global threads list and resolve the map and symbol, filling all
this info into the new addr_location struct, so that tools like
annotate and report can further process the event by creating
hist_entries in their specific way (with or without callgraphs,
etc).
It in turn uses the new next layer function:
void thread__find_addr_location(struct thread *self, u8 cpumode,
enum map_type type, u64 addr,
struct addr_location *al,
symbol_filter_t filter)
This one will, given a thread (userspace or the kernel kthread
one), will find the given type (MAP__FUNCTION now, MAP__VARIABLE
too in the near future) at the given cpumode, taking vdsos into
account (userspace hit, but kernel symbol) and will fill all
these details in the addr_location given.
Tools that need a more compact API for plain function
resolution, like 'kmem', can use this other one:
struct symbol *thread__find_function(struct thread *self, u64 addr,
symbol_filter_t filter)
So, to resolve a kernel symbol, that is all the 'kmem' tool
needs, its just a matter of calling:
sym = thread__find_function(kthread, addr, NULL);
The 'filter' parameter is needed because we do lazy
parsing/loading of ELF symtabs or /proc/kallsyms.
With this we remove more code duplication all around, which is
always good, huh? :-)
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Frédéric Weisbecker <fweisbec@gmail.com>
Cc: John Kacur <jkacur@redhat.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Paul Mackerras <paulus@samba.org>
LKML-Reference: <1259346563-12568-12-git-send-email-acme@infradead.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-11-28 02:29:23 +08:00
|
|
|
|
2009-09-25 00:02:18 +08:00
|
|
|
#endif /* __PERF_RECORD_H */
|