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: David Ahern <dsahern@gmail.com>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
diff --git a/tools/perf/Documentation/perf-script.txt b/tools/perf/Documentation/perf-script.txt
index 3613b0a..7f61eaa 100644
--- a/tools/perf/Documentation/perf-script.txt
+++ b/tools/perf/Documentation/perf-script.txt
@@ -188,6 +188,11 @@
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
diff --git a/tools/perf/builtin-script.c b/tools/perf/builtin-script.c
index 7731a09..619d6dc 100644
--- a/tools/perf/builtin-script.c
+++ b/tools/perf/builtin-script.c
@@ -441,6 +441,7 @@
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 @@
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 @@
"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()