Messages in this thread Patch in this message | | | From | Kyle Meyer <> | Subject | [PATCH v4 4/7] perf/util/session: Replace MAX_NR_CPUS with nr_cpus_online | Date | Tue, 27 Aug 2019 16:43:49 -0500 |
| |
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.
Cc: Peter Zijlstra <peterz@infradead.org> Cc: Ingo Molnar <mingo@redhat.com> Cc: Arnaldo Carvalho de Melo <acme@kernel.org> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: linux-kernel@vger.kernel.org Cc: Russ Anderson <russ.anderson@hpe.com> Signed-off-by: Kyle Meyer <kyle.meyer@hpe.com> --- 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 82e0438a9160..2f0d84a71ded 100644 --- a/tools/perf/util/session.c +++ b/tools/perf/util/session.c @@ -2291,6 +2291,7 @@ 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; @@ -2315,7 +2316,7 @@ 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; -- 2.12.3
| |