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perf session: Parse sample earlier

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At perf_session__process_event, so that we reduce the number of lines in eache
tool sample processing routine that now receives a sample_data pointer already
parsed.

This will also be useful in the next patch, where we'll allow sample the
identity fields in MMAP, FORK, EXIT, etc, when it will be possible to see (cpu,
timestamp) just after before every event.

Also validate callchains in perf_session__process_event, i.e. as early as
possible, and keep a counter of the number of events discarded due to invalid
callchains, warning the user about it if it happens.

There is an assumption that was kept that all events have the same sample_type,
that will be dealt with in the future, when this preexisting limitation will be
removed.

Tested-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Ian Munsie <imunsie@au1.ibm.com>
Acked-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Frédéric Weisbecker <fweisbec@gmail.com>
Cc: Ian Munsie <imunsie@au1.ibm.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Stephane Eranian <eranian@google.com>
LKML-Reference: <1291318772-30880-4-git-send-email-acme@infradead.org>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Arnaldo Carvalho de Melo 2010-12-02 14:10:21 -02:00
parent c980d10918
commit 640c03ce83
18 changed files with 237 additions and 193 deletions
Download patch file Download diff file Expand all files Collapse all files

11
tools/perf/builtin-diff.c
View file

@ -30,12 +30,13 @@ static int hists__add_entry(struct hists *self,
return -ENOMEM;
}
static int diff__process_sample_event(event_t *event, struct perf_session *session)
static int diff__process_sample_event(event_t *event,
struct sample_data *sample,
struct perf_session *session)
{
struct addr_location al;
struct sample_data data = { .period = 1, };
if (event__preprocess_sample(event, session, &al, &data, NULL) < 0) {
if (event__preprocess_sample(event, session, &al, sample, NULL) < 0) {
pr_warning("problem processing %d event, skipping it.\n",
event->header.type);
return -1;
@ -44,12 +45,12 @@ static int diff__process_sample_event(event_t *event, struct perf_session *sessi
if (al.filtered || al.sym == NULL)
return 0;
if (hists__add_entry(&session->hists, &al, data.period)) {
if (hists__add_entry(&session->hists, &al, sample->period)) {
pr_warning("problem incrementing symbol period, skipping event\n");
return -1;
}
session->hists.stats.total_period += data.period;
session->hists.stats.total_period += sample->period;
return 0;
}