nr_cpus_online, the number of CPUs online during a record session, can be used as a dynamic alternative for MAX_NR_CPUS in perf_session__cpu_bitmap.
Cc: Peter Zijlstra <[email protected]> Cc: Ingo Molnar <[email protected]> Cc: Arnaldo Carvalho de Melo <[email protected]> Cc: Alexander Shishkin <[email protected]> Cc: Jiri Olsa <[email protected]> Cc: Namhyung Kim <[email protected]> Cc: [email protected] Cc: Russ Anderson <[email protected]> Signed-off-by: Kyle Meyer <[email protected]> --- tools/perf/util/session.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) Index: tip/tools/perf/util/session.c =================================================================== --- tip.orig/tools/perf/util/session.c +++ tip/tools/perf/util/session.c @@ -2284,6 +2284,7 @@ int perf_session__cpu_bitmap(struct perf { int i, err = -1; struct perf_cpu_map *map; + int nr_cpus_online = session->header.env.nr_cpus_online; for (i = 0; i < PERF_TYPE_MAX; ++i) { struct evsel *evsel; @@ -2308,9 +2309,8 @@ int perf_session__cpu_bitmap(struct perf for (i = 0; i < map->nr; i++) { int cpu = map->map[i]; - if (cpu >= MAX_NR_CPUS) { - pr_err("Requested CPU %d too large. " - "Consider raising MAX_NR_CPUS\n", cpu); + if (cpu >= nr_cpus_online) { + pr_err("Requested CPU %d too large\n", cpu); goto out_delete_map; }
