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perf record: Stop intercepting events, use postprocessing to get build-ids

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We want to stream events as fast as possible to perf.data, and
also in the future we want to have splice working, when no
interception will be possible.

Using build_id__mark_dso_hit_ops to create the list of DSOs that
back MMAPs we also optimize disk usage in the build-id cache by
only caching DSOs that had hits.

Suggested-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com>
Cc: Frédéric Weisbecker <fweisbec@gmail.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
LKML-Reference: <1265223128-11786-6-git-send-email-acme@infradead.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Arnaldo Carvalho de Melo
2010-02-03 16:52:05 -02:00
committed by Ingo Molnar
parent 7b2567c1f5
commit 6122e4e4f5
6 changed files with 73 additions and 53 deletions
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13
tools/perf/util/symbol.c
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@ -1076,25 +1076,28 @@ static bool dso__build_id_equal(const struct dso *self, u8 *build_id)
return memcmp(self->build_id, build_id, sizeof(self->build_id)) == 0;
}
static bool __dsos__read_build_ids(struct list_head *head)
static bool __dsos__read_build_ids(struct list_head *head, bool with_hits)
{
bool have_build_id = false;
struct dso *pos;
list_for_each_entry(pos, head, node)
list_for_each_entry(pos, head, node) {
if (with_hits && !pos->hit)
continue;
if (filename__read_build_id(pos->long_name, pos->build_id,
sizeof(pos->build_id)) > 0) {
have_build_id = true;
pos->has_build_id = true;
}
}
return have_build_id;
}
bool dsos__read_build_ids(void)
bool dsos__read_build_ids(bool with_hits)
{
bool kbuildids = __dsos__read_build_ids(&dsos__kernel),
ubuildids = __dsos__read_build_ids(&dsos__user);
bool kbuildids = __dsos__read_build_ids(&dsos__kernel, with_hits),
ubuildids = __dsos__read_build_ids(&dsos__user, with_hits);
return kbuildids || ubuildids;
}