@@ -8,6 +8,7 @@
#include <unistd.h>
#include <api/fs/fs.h>
#include <linux/kernel.h>
+#include "cpumap.h"
#include "map_symbol.h"
#include "mem-events.h"
#include "mem-info.h"
@@ -242,6 +243,7 @@ int perf_mem_events__record_args(const char **rec_argv, int *argv_nr)
int i = *argv_nr;
const char *s;
char *copy;
+ struct perf_cpu_map *cpu_map = NULL;
while ((pmu = perf_pmus__scan_mem(pmu)) != NULL) {
for (int j = 0; j < PERF_MEM_EVENTS__MAX; j++) {
@@ -266,7 +268,19 @@ int perf_mem_events__record_args(const char **rec_argv, int *argv_nr)
rec_argv[i++] = "-e";
rec_argv[i++] = copy;
+
+ cpu_map = perf_cpu_map__merge(cpu_map, pmu->cpus);
+ }
+ }
+
+ if (cpu_map) {
+ if (!perf_cpu_map__equal(cpu_map, cpu_map__online())) {
+ char buf[200];
+
+ cpu_map__snprint(cpu_map, buf, sizeof(buf));
+ pr_warning("Memory events are enabled on a subset of CPUs: %s\n", buf);
}
+ perf_cpu_map__put(cpu_map);
}
*argv_nr = i;
It is possible that memory events are not supported on all CPUs. Prints a warning by dumping the enabled CPU maps in this case. Signed-off-by: Leo Yan <leo.yan@arm.com> --- tools/perf/util/mem-events.c | 14 ++++++++++++++ 1 file changed, 14 insertions(+)