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perf evsel: Add PERF_SAMPLE_READ sample related processing

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For sample with sample type PERF_SAMPLE_READ the period value is stored
in the 'struct sample_read'.

Moreover if the read format has PERF_FORMAT_GROUP, the 'struct
sample_read' contains period values for all events in the group (for
which the sample's event is a leader).

We deliver separated samples for all the values contained within the
'struct sample_read'.

Signed-off-by: Jiri Olsa <jolsa@redhat.com>
Acked-by: Namhyung Kim <namhyung@kernel.org>
Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/n/tip-6mdm5xkrm6kypouh1c33cyys@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Jiri Olsa 2012-10-10 18:52:24 +02:00 committed by Arnaldo Carvalho de Melo
parent 932a35940a
commit e4caec0d1a
2 changed files with 74 additions and 1 deletions
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3
tools/perf/util/evsel.h
View file

@ -38,6 +38,9 @@ struct perf_sample_id {
struct hlist_node node;
u64 id;
struct perf_evsel *evsel;
/* Holds total ID period value for PERF_SAMPLE_READ processing. */
u64 period;
};
/** struct perf_evsel - event selector

72
tools/perf/util/session.c
View file

@ -860,6 +860,75 @@ static struct machine *
return &session->machines.host;
}
static int deliver_sample_value(struct perf_session *session,
struct perf_tool *tool,
union perf_event *event,
struct perf_sample *sample,
struct sample_read_value *v,
struct machine *machine)
{
struct perf_sample_id *sid;
sid = perf_evlist__id2sid(session->evlist, v->id);
if (sid) {
sample->id = v->id;
sample->period = v->value - sid->period;
sid->period = v->value;
}
if (!sid || sid->evsel == NULL) {
++session->stats.nr_unknown_id;
return 0;
}
return tool->sample(tool, event, sample, sid->evsel, machine);
}
static int deliver_sample_group(struct perf_session *session,
struct perf_tool *tool,
union perf_event *event,
struct perf_sample *sample,
struct machine *machine)
{
int ret = -EINVAL;
u64 i;
for (i = 0; i < sample->read.group.nr; i++) {
ret = deliver_sample_value(session, tool, event, sample,
&sample->read.group.values[i],
machine);
if (ret)
break;
}
return ret;
}
static int
perf_session__deliver_sample(struct perf_session *session,
struct perf_tool *tool,
union perf_event *event,
struct perf_sample *sample,
struct perf_evsel *evsel,
struct machine *machine)
{
/* We know evsel != NULL. */
u64 sample_type = evsel->attr.sample_type;
u64 read_format = evsel->attr.read_format;
/* Standard sample delievery. */
if (!(sample_type & PERF_SAMPLE_READ))
return tool->sample(tool, event, sample, evsel, machine);
/* For PERF_SAMPLE_READ we have either single or group mode. */
if (read_format & PERF_FORMAT_GROUP)
return deliver_sample_group(session, tool, event, sample,
machine);
else
return deliver_sample_value(session, tool, event, sample,
&sample->read.one, machine);
}
static int perf_session_deliver_event(struct perf_session *session,
union perf_event *event,
struct perf_sample *sample,
@ -902,7 +971,8 @@ static int perf_session_deliver_event(struct perf_session *session,
++session->stats.nr_unprocessable_samples;
return 0;
}
return tool->sample(tool, event, sample, evsel, machine);
return perf_session__deliver_sample(session, tool, event,
sample, evsel, machine);
case PERF_RECORD_MMAP:
return tool->mmap(tool, event, sample, machine);
case PERF_RECORD_COMM: