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perf record: Reduce memory for recording PERF_RECORD_LOST_SAMPLES event 

Reduce from PERF_SAMPLE_MAX_SIZE to "sizeof(*lost) +
session->machines.host.id_hdr_size".

Suggested-by: Namhyung Kim <namhyung@kernel.org>
Signed-off-by: Ian Rogers <irogers@google.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: https://lore.kernel.org/r/20231207021627.1322884-1-irogers@google.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Ian Rogers 2023-12-06 18:16:27 -08:00 committed by Arnaldo Carvalho de Melo
parent 9c51f8788b
commit 7d1405c71d
1 changed files with 4 additions and 2 deletions
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6
tools/perf/builtin-record.c
View File

@ -1954,7 +1954,8 @@ static void record__read_lost_samples(struct record *rec)
if (count.lost) {
if (!lost) {
lost = zalloc(PERF_SAMPLE_MAX_SIZE);
lost = zalloc(sizeof(*lost) +
session->machines.host.id_hdr_size);
if (!lost) {
pr_debug("Memory allocation failed\n");
return;
@ -1970,7 +1971,8 @@ static void record__read_lost_samples(struct record *rec)
lost_count = perf_bpf_filter__lost_count(evsel);
if (lost_count) {
if (!lost) {
lost = zalloc(PERF_SAMPLE_MAX_SIZE);
lost = zalloc(sizeof(*lost) +
session->machines.host.id_hdr_size);
if (!lost) {
pr_debug("Memory allocation failed\n");
return;