Commit 60ab2716 authored Dec 16, 2009 by Peter Zijlstra Committed by Ingo Molnar Dec 16, 2009

perf record: Use per-task-per-cpu events for inherited events

Create events with a pid and cpu contraint for inherited events
so that we get a stream per cpu, instead of all cpus contending
on a single stream.

Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: fweisbec@gmail.com
Cc: Paul Mackerras <paulus@samba.org>
LKML-Reference: <20091216165904.987643843@chello.nl>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

parent 856e9660

tools/perf/builtin-record.c

+2 −2

Original line number	Diff line number	Diff line
		@@ -278,7 +278,7 @@ static void create_counter(int counter, int cpu, pid_t pid)

		attr->mmap = track;
		attr->comm = track;
		attr->inherit = (cpu < 0) && inherit;
		attr->inherit = inherit;
		attr->disabled = 1;

		try_again:
		@@ -537,7 +537,7 @@ static int __cmd_record(int argc __used, const char **argv)
		}


		if (!system_wide \|\| profile_cpu != -1) {
		if ((!system_wide && !inherit) \|\| profile_cpu != -1) {
		open_counters(profile_cpu, target_pid);
		} else {
		for (i = 0; i < nr_cpus; i++)