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perf record: Cache build-ID of hit DSOs only
[ Upstream commit6235ce7774
] It post-processes samples to find which DSO has samples. Based on that info, it can save used DSOs in the build-ID cache directory. But for some reason, it saves all DSOs without checking the hit mark. Skipping unused DSOs can give some speedup especially with --buildid-mmap being default. On my idle machine, `time perf record -a sleep 1` goes down from 3 sec to 1.5 sec with this change. Fixes:e29386c8f7
("perf record: Add --buildid-mmap option to enable PERF_RECORD_MMAP2's build id") Reviewed-by: Arnaldo Carvalho de Melo <acme@redhat.com> Link: https://lore.kernel.org/r/20250731070330.57116-1-namhyung@kernel.org Signed-off-by: Namhyung Kim <namhyung@kernel.org> Signed-off-by: Sasha Levin <sashal@kernel.org>
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@ -864,7 +864,7 @@ static int dso__cache_build_id(struct dso *dso, struct machine *machine,
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char *allocated_name = NULL;
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int ret = 0;
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if (!dso__has_build_id(dso))
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if (!dso__has_build_id(dso) || !dso__hit(dso))
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return 0;
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if (dso__is_kcore(dso)) {
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