perf evlist: Introduce id_hdr_size method out of perf_session

We will need this when not using perf_session in cases like 'perf top'
and strace where no perf.data file is created nor consumed.

Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/n/tip-za923wjc41q5xot5vrhuhj3j@git.kernel.orgSigned-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
parent d04b35f8
......@@ -625,6 +625,38 @@ u64 perf_evlist__sample_type(const struct perf_evlist *evlist)
return first->attr.sample_type;
}
u16 perf_evlist__id_hdr_size(const struct perf_evlist *evlist)
{
struct perf_evsel *first;
struct perf_sample *data;
u64 sample_type;
u16 size = 0;
first = list_entry(evlist->entries.next, struct perf_evsel, node);
if (!first->attr.sample_id_all)
goto out;
sample_type = first->attr.sample_type;
if (sample_type & PERF_SAMPLE_TID)
size += sizeof(data->tid) * 2;
if (sample_type & PERF_SAMPLE_TIME)
size += sizeof(data->time);
if (sample_type & PERF_SAMPLE_ID)
size += sizeof(data->id);
if (sample_type & PERF_SAMPLE_STREAM_ID)
size += sizeof(data->stream_id);
if (sample_type & PERF_SAMPLE_CPU)
size += sizeof(data->cpu) * 2;
out:
return size;
}
bool perf_evlist__valid_sample_id_all(const struct perf_evlist *evlist)
{
struct perf_evsel *pos, *first;
......
......@@ -104,6 +104,7 @@ int perf_evlist__set_filters(struct perf_evlist *evlist);
u64 perf_evlist__sample_type(const struct perf_evlist *evlist);
bool perf_evlist__sample_id_all(const const struct perf_evlist *evlist);
u16 perf_evlist__id_hdr_size(const struct perf_evlist *evlist);
bool perf_evlist__valid_sample_type(const struct perf_evlist *evlist);
bool perf_evlist__valid_sample_id_all(const struct perf_evlist *evlist);
......
......@@ -78,39 +78,12 @@ static int perf_session__open(struct perf_session *self, bool force)
return -1;
}
static void perf_session__id_header_size(struct perf_session *session)
{
struct perf_sample *data;
u64 sample_type = session->sample_type;
u16 size = 0;
if (!session->sample_id_all)
goto out;
if (sample_type & PERF_SAMPLE_TID)
size += sizeof(data->tid) * 2;
if (sample_type & PERF_SAMPLE_TIME)
size += sizeof(data->time);
if (sample_type & PERF_SAMPLE_ID)
size += sizeof(data->id);
if (sample_type & PERF_SAMPLE_STREAM_ID)
size += sizeof(data->stream_id);
if (sample_type & PERF_SAMPLE_CPU)
size += sizeof(data->cpu) * 2;
out:
session->id_hdr_size = size;
}
void perf_session__update_sample_type(struct perf_session *self)
{
self->sample_type = perf_evlist__sample_type(self->evlist);
self->sample_size = __perf_evsel__sample_size(self->sample_type);
self->sample_id_all = perf_evlist__sample_id_all(self->evlist);
perf_session__id_header_size(self);
self->id_hdr_size = perf_evlist__id_hdr_size(self->evlist);
}
int perf_session__create_kernel_maps(struct perf_session *self)
......
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