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perf script: Add comm filtering option

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Allows collecting events system wide and then pulling out events for a
specific task name(s). e.g,

    perf script -c gnome-shell,gnome-terminal

Applies on top of:
    https://lkml.org/lkml/2011/11/13/74

v2->v3
- update Documentation

v1->v2
- use comm_list from symbol_conf

Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/1321894972-24246-1-git-send-email-dsahern@gmail.com
Signed-off-by: David Ahern <dsahern@gmail.com>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
David Ahern 2011-11-21 10:02:52 -07:00 committed by Arnaldo Carvalho de Melo
parent c8e6672035
commit e7984b7bee
2 changed files with 17 additions and 0 deletions
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5
tools/perf/Documentation/perf-script.txt
View File

@ -188,6 +188,11 @@ OPTIONS
CPUs are specified with -: 0-2. Default is to report samples on all
CPUs.
-c::
--comms=::
Only display events for these comms. CSV that understands
file://filename entries.
-I::
--show-info::
Display extended information about the perf.data file. This adds

12
tools/perf/builtin-script.c
View File

@ -441,6 +441,7 @@ static int process_sample_event(struct perf_tool *tool __used,
struct perf_evsel *evsel,
struct machine *machine)
{
struct addr_location al;
struct thread *thread = machine__findnew_thread(machine, event->ip.pid);
if (thread == NULL) {
@ -460,6 +461,15 @@ static int process_sample_event(struct perf_tool *tool __used,
return 0;
}
if (perf_event__preprocess_sample(event, machine, &al, sample, 0) < 0) {
pr_err("problem processing %d event, skipping it.\n",
event->header.type);
return -1;
}
if (al.filtered)
return 0;
if (cpu_list && !test_bit(sample->cpu, cpu_bitmap))
return 0;
@ -1086,6 +1096,8 @@ static const struct option options[] = {
"comma separated output fields prepend with 'type:'. Valid types: hw,sw,trace,raw. Fields: comm,tid,pid,time,cpu,event,trace,ip,sym,dso,addr",
parse_output_fields),
OPT_STRING('C', "cpu", &cpu_list, "cpu", "list of cpus to profile"),
OPT_STRING('c', "comms", &symbol_conf.comm_list_str, "comm[,comm...]",
"only display events for these comms"),
OPT_BOOLEAN('I', "show-info", &show_full_info,
"display extended information from perf.data file"),
OPT_END()