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| author | Ingo Molnar <mingo@elte.hu> | 2009-09-17 18:24:55 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2009-09-17 22:09:19 +0200 |
| commit | 40749d0ff49f99c3661b336fe5e5625207bd925a (patch) | |
| tree | 29856d175cd23b90b67e2efaa7146ddf0f4c7612 /tools/perf/builtin-sched.c | |
| parent | 8b412664d0a487c2e16ac43f4fcede346df33254 (diff) | |
| download | lwn-40749d0ff49f99c3661b336fe5e5625207bd925a.tar.gz lwn-40749d0ff49f99c3661b336fe5e5625207bd925a.zip | |
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/perf/builtin-sched.c')
| -rw-r--r-- | tools/perf/builtin-sched.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/tools/perf/builtin-sched.c b/tools/perf/builtin-sched.c index f67e351b050b..9e04827d16be 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(); |