From 6122e4e4f5d0913e319ef8a4dc60a47afe4abc0a Mon Sep 17 00:00:00 2001 From: Arnaldo Carvalho de Melo Date: Wed, 3 Feb 2010 16:52:05 -0200 Subject: perf record: Stop intercepting events, use postprocessing to get build-ids MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit 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 Signed-off-by: Arnaldo Carvalho de Melo Cc: Xiao Guangrong Cc: Frédéric Weisbecker Cc: Mike Galbraith Cc: Paul Mackerras LKML-Reference: <1265223128-11786-6-git-send-email-acme@infradead.org> Signed-off-by: Ingo Molnar --- tools/perf/util/header.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) (limited to 'tools/perf/util/header.c') diff --git a/tools/perf/util/header.c b/tools/perf/util/header.c index ed3efd728b4..d5facd5ab1f 100644 --- a/tools/perf/util/header.c +++ b/tools/perf/util/header.c @@ -205,8 +205,11 @@ static int __dsos__write_buildid_table(struct list_head *head, u16 misc, int fd) dsos__for_each_with_build_id(pos, head) { int err; struct build_id_event b; - size_t len = pos->long_name_len + 1; + size_t len; + if (!pos->hit) + continue; + len = pos->long_name_len + 1; len = ALIGN(len, NAME_ALIGN); memset(&b, 0, sizeof(b)); memcpy(&b.build_id, pos->build_id, sizeof(pos->build_id)); @@ -371,7 +374,7 @@ static int perf_header__adds_write(struct perf_header *self, int fd) u64 sec_start; int idx = 0, err; - if (dsos__read_build_ids()) + if (dsos__read_build_ids(true)) perf_header__set_feat(self, HEADER_BUILD_ID); nr_sections = bitmap_weight(self->adds_features, HEADER_FEAT_BITS); -- cgit v1.2.3