Commit 7df4e36a authored Aug 27, 2019 by Kyle Meyer Committed by Arnaldo Carvalho de Melo Aug 29, 2019

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@hpe.com>
Reviewed-by: Jiri Olsa <jolsa@redhat.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Russ Anderson <russ.anderson@hpe.com>
Link: http://lore.kernel.org/lkml/20190827214352.94272-5-meyerk@stormcage.eag.rdlabs.hpecorp.net


Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

parent 92b5a154

tools/perf/util/session.c

+2 −1

Original line number	Diff line number	Diff line
		@@ -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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