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Subject[PATCH v3 4/6] perf/util/session: Replace MAX_NR_CPUS with nr_cpus_online
Date
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 <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 | 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;
}

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