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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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64
tools/perf/util/session.c
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@ -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)) {