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Code Issues Releases Wiki Activity

libperf evlist: Check nr_mmaps is correct

Browse source 
Print an error message if the predetermined number of mmaps is
incorrect.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Acked-by: Ian Rogers <irogers@google.com>
Acked-by: Namhyung Kim <namhyung@kernel.org>
Cc: Alexey Bayduraev <alexey.v.bayduraev@linux.intel.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Leo Yan <leo.yan@linaro.org>
Link: https://lore.kernel.org/r/20220524075436.29144-12-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Adrian Hunter 2022-05-24 10:54:32 +03:00 committed by Arnaldo Carvalho de Melo
parent ae4f8ae16a
commit 4ce47d842d
1 changed files with 9 additions and 2 deletions
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11
tools/lib/perf/evlist.c
View file

@ -23,6 +23,7 @@
#include <perf/cpumap.h>
#include <perf/threadmap.h>
#include <api/fd/array.h>
#include "internal.h"
void perf_evlist__init(struct perf_evlist *evlist)
{
@ -428,7 +429,7 @@ static void perf_evlist__set_mmap_first(struct perf_evlist *evlist, struct perf_
static int
mmap_per_evsel(struct perf_evlist *evlist, struct perf_evlist_mmap_ops *ops,
int idx, struct perf_mmap_param *mp, int cpu_idx,
int thread, int *_output, int *_output_overwrite)
int thread, int *_output, int *_output_overwrite, int *nr_mmaps)
{
struct perf_cpu evlist_cpu = perf_cpu_map__cpu(evlist->all_cpus, cpu_idx);
struct perf_evsel *evsel;
@ -484,6 +485,8 @@ mmap_per_evsel(struct perf_evlist *evlist, struct perf_evlist_mmap_ops *ops,
if (ops->mmap(map, mp, *output, evlist_cpu) < 0)
return -1;
*nr_mmaps += 1;
if (!idx)
perf_evlist__set_mmap_first(evlist, map, overwrite);
} else {
@ -518,6 +521,7 @@ mmap_per_cpu(struct perf_evlist *evlist, struct perf_evlist_mmap_ops *ops,
{
int nr_threads = perf_thread_map__nr(evlist->threads);
int nr_cpus = perf_cpu_map__nr(evlist->all_cpus);
int nr_mmaps = 0;
int cpu, thread;
for (cpu = 0; cpu < nr_cpus; cpu++) {
@ -526,11 +530,14 @@ mmap_per_cpu(struct perf_evlist *evlist, struct perf_evlist_mmap_ops *ops,
for (thread = 0; thread < nr_threads; thread++) {
if (mmap_per_evsel(evlist, ops, cpu, mp, cpu,
thread, &output, &output_overwrite))
thread, &output, &output_overwrite, &nr_mmaps))
goto out_unmap;
}
}
if (nr_mmaps != evlist->nr_mmaps)
pr_err("Miscounted nr_mmaps %d vs %d\n", nr_mmaps, evlist->nr_mmaps);
return 0;
out_unmap: