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authorIngo Molnar <mingo@elte.hu>2009-09-17 18:24:55 +0200
committerIngo Molnar <mingo@elte.hu>2009-09-17 22:09:19 +0200
commit40749d0ff49f99c3661b336fe5e5625207bd925a (patch)
tree29856d175cd23b90b67e2efaa7146ddf0f4c7612 /tools
parent8b412664d0a487c2e16ac43f4fcede346df33254 (diff)
perf sched: Determine the number of CPUs automatically
For 'perf sched map' output, determine max_cpu automatically, instead of the static default of 15. [ v2: use sysconf() pointed out by Arjan van de Ven <arjan@infradead.org> ] Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Mike Galbraith <efault@gmx.de> Cc: Paul Mackerras <paulus@samba.org> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> LKML-Reference: <new-submission> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'tools')
-rw-r--r--tools/perf/builtin-sched.c4
1 files changed, 3 insertions, 1 deletions
diff --git a/tools/perf/builtin-sched.c b/tools/perf/builtin-sched.c
index f67e351b050..9e04827d16b 100644
--- a/tools/perf/builtin-sched.c
+++ b/tools/perf/builtin-sched.c
@@ -1347,7 +1347,7 @@ process_sched_wakeup_event(struct raw_event_sample *raw,
* Track the current task - that way we can know whether there's any
* weird events, such as a task being switched away that is not current.
*/
-static int max_cpu = 15;
+static int max_cpu;
static u32 curr_pid[MAX_CPUS] = { [0 ... MAX_CPUS-1] = -1 };
@@ -1818,6 +1818,8 @@ static struct trace_sched_handler map_ops = {
static void __cmd_map(void)
{
+ max_cpu = sysconf(_SC_NPROCESSORS_CONF);
+
setup_pager();
read_events();
print_bad_events();