From 40749d0ff49f99c3661b336fe5e5625207bd925a Mon Sep 17 00:00:00 2001 From: Ingo Molnar Date: Thu, 17 Sep 2009 18:24:55 +0200 Subject: [PATCH] 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 ] Cc: Peter Zijlstra Cc: Mike Galbraith Cc: Paul Mackerras Cc: Arnaldo Carvalho de Melo Cc: Frederic Weisbecker LKML-Reference: Signed-off-by: Ingo Molnar --- tools/perf/builtin-sched.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) 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(); -- 2.20.1