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 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/session.c | 64 ++++++++++++++++++++++++++++------------------- 1 file changed, 38 insertions(+), 26 deletions(-) (limited to 'tools/perf/util/session.c') diff --git a/tools/perf/util/session.c b/tools/perf/util/session.c index aa8a03120bbd..74cbc64a3a3c 100644 --- a/tools/perf/util/session.c +++ b/tools/perf/util/session.c @@ -385,8 +385,9 @@ static struct thread *perf_session__register_idle_thread(struct perf_session *se return thread; } -int perf_session__process_events(struct perf_session *self, - struct perf_event_ops *ops) +int __perf_session__process_events(struct perf_session *self, + u64 data_offset, u64 data_size, + u64 file_size, struct perf_event_ops *ops) { int err, mmap_prot, mmap_flags; u64 head, shift; @@ -396,32 +397,11 @@ int perf_session__process_events(struct perf_session *self, uint32_t size; char *buf; - if (perf_session__register_idle_thread(self) == NULL) - return -ENOMEM; - perf_event_ops__fill_defaults(ops); page_size = sysconf(_SC_PAGESIZE); - head = self->header.data_offset; - - if (!symbol_conf.full_paths) { - char bf[PATH_MAX]; - - if (getcwd(bf, sizeof(bf)) == NULL) { - err = -errno; -out_getcwd_err: - pr_err("failed to get the current directory\n"); - goto out_err; - } - self->cwd = strdup(bf); - if (self->cwd == NULL) { - err = -ENOMEM; - goto out_getcwd_err; - } - self->cwdlen = strlen(self->cwd); - } - + head = data_offset; shift = page_size * (head / page_size); offset += shift; head -= shift; @@ -486,10 +466,10 @@ more: head += size; - if (offset + head >= self->header.data_offset + self->header.data_size) + if (offset + head >= data_offset + data_size) goto done; - if (offset + head < self->size) + if (offset + head < file_size) goto more; done: err = 0; @@ -497,6 +477,38 @@ out_err: return err; } +int perf_session__process_events(struct perf_session *self, + struct perf_event_ops *ops) +{ + int err; + + if (perf_session__register_idle_thread(self) == NULL) + return -ENOMEM; + + if (!symbol_conf.full_paths) { + char bf[PATH_MAX]; + + if (getcwd(bf, sizeof(bf)) == NULL) { + err = -errno; +out_getcwd_err: + pr_err("failed to get the current directory\n"); + goto out_err; + } + self->cwd = strdup(bf); + if (self->cwd == NULL) { + err = -ENOMEM; + goto out_getcwd_err; + } + self->cwdlen = strlen(self->cwd); + } + + err = __perf_session__process_events(self, self->header.data_offset, + self->header.data_size, + self->size, ops); +out_err: + return err; +} + bool perf_session__has_traces(struct perf_session *self, const char *msg) { if (!(self->sample_type & PERF_SAMPLE_RAW)) { -- cgit v1.2.3-55-g7522