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Commit e7984b7b authored by David Ahern's avatar David Ahern Committed by Arnaldo Carvalho de Melo
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perf script: Add comm filtering option 

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: default avatarDavid Ahern <dsahern@gmail.com>
Signed-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
parent c8e66720

tools/perf/Documentation/perf-script.txt

+5 −0
Original line number Diff line number Diff line
@@ -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

tools/perf/builtin-script.c

+12 −0
Original line number Diff line number Diff line
@@ -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()