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perf session: Replace MAX_NR_CPUS with perf_env::nr_cpus_online

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nr_cpus, the number of CPUs online during a record session bound by
MAX_NR_CPUS, can be used as a dynamic alternative for MAX_NR_CPUS in
perf_session__cpu_bitmap.

Signed-off-by: Kyle Meyer <[email protected]>
Reviewed-by: Jiri Olsa <[email protected]>
Cc: Alexander Shishkin <[email protected]>
Cc: Namhyung Kim <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Russ Anderson <[email protected]>
Link: http://lore.kernel.org/lkml/[email protected]
Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
This commit is contained in:
Kyle Meyer authored and Arnaldo Carvalho de Melo committed 2019-08-29 17:38:32 -03:00
1 parent 92b5a1545a
commit 7df4e36a47
1 file changed
+2 -1
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tools/perf/util/session.c
+2 -1
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@@ -2292,6 +2292,7 @@ int perf_session__cpu_bitmap(struct perf_session *session,
{
int i, err = -1;
struct perf_cpu_map *map;
int nr_cpus = min(session->header.env.nr_cpus_online, MAX_NR_CPUS);
for (i = 0; i < PERF_TYPE_MAX; ++i) {
struct evsel *evsel;
@@ -2316,7 +2317,7 @@ int perf_session__cpu_bitmap(struct perf_session *session,
for (i = 0; i < map->nr; i++) {
int cpu = map->map[i];
if (cpu >= MAX_NR_CPUS) {
if (cpu >= nr_cpus) {
pr_err("Requested CPU %d too large. "
"Consider raising MAX_NR_CPUS\n", cpu);
goto out_delete_map;