The following commit has been merged into the perf/core branch of tip:
Commit-ID: 7df4e36a4785618f0c63f3dc2bacb164780ab0f6
Gitweb: https://git.kernel.org/tip/7df4e36a4785618f0c63f3dc2bacb164780ab0f6
Author: Kyle Meyer <meyerk@xxxxxxx>
AuthorDate: Tue, 27 Aug 2019 16:43:49 -05:00
Committer: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
CommitterDate: Thu, 29 Aug 2019 17:38:32 -03:00
perf session: Replace MAX_NR_CPUS with perf_env::nr_cpus_online
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 <kyle.meyer@xxxxxxx>
Reviewed-by: Jiri Olsa <jolsa@xxxxxxxxxx>
Cc: Alexander Shishkin <alexander.shishkin@xxxxxxxxxxxxxxx>
Cc: Namhyung Kim <namhyung@xxxxxxxxxx>
Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Cc: Russ Anderson <russ.anderson@xxxxxxx>
Link: http://lore.kernel.org/lkml/20190827214352.94272-5-meyerk@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
Signed-off-by: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
---
tools/perf/util/session.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/tools/perf/util/session.c b/tools/perf/util/session.c
index 7350b0d..13486bc 100644
--- a/tools/perf/util/session.c
+++ b/tools/perf/util/session.c
@@ -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;
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