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>
diff --git a/tools/perf/builtin-sched.c b/tools/perf/builtin-sched.c
index f67e351..9e04827 100644
--- a/tools/perf/builtin-sched.c
+++ b/tools/perf/builtin-sched.c
@@ -1347,7 +1347,7 @@
* 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 void __cmd_map(void)
{
+ max_cpu = sysconf(_SC_NPROCESSORS_CONF);
+
setup_pager();
read_events();
print_bad_events();