perf tools: Add support for PERF_SAMPLE_IDENTIFIER
Enable parsing of samples with sample format bit PERF_SAMPLE_IDENTIFIER. In addition, if the kernel supports it, prefer it to selecting PERF_SAMPLE_ID thereby allowing non-matching sample types. Signed-off-by: Adrian Hunter <adrian.hunter@intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Ingo Molnar <mingo@kernel.org> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Mike Galbraith <efault@gmx.de> Cc: Namhyung Kim <namhyung@gmail.com> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Stephane Eranian <eranian@google.com> Link: http://lkml.kernel.org/r/1377591794-30553-8-git-send-email-adrian.hunter@intel.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Adrian Hunter
Arnaldo Carvalho de Melo
parent
faf967068e
commit
75562573ba
9 changed files with 310 additions and 22 deletions
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@ -365,7 +365,7 @@ static int process_read_event(struct perf_tool *tool,
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static int perf_report__setup_sample_type(struct perf_report *rep)
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{
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struct perf_session *self = rep->session;
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u64 sample_type = perf_evlist__sample_type(self->evlist);
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u64 sample_type = perf_evlist__combined_sample_type(self->evlist);
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if (!self->fd_pipe && !(sample_type & PERF_SAMPLE_CALLCHAIN)) {
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if (sort__has_parent) {
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@ -72,7 +72,7 @@ int test__basic_mmap(void)
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}
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evsels[i]->attr.wakeup_events = 1;
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perf_evsel__set_sample_id(evsels[i]);
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perf_evsel__set_sample_id(evsels[i], false);
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perf_evlist__add(evlist, evsels[i]);
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@ -53,7 +53,8 @@ struct read_event {
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(PERF_SAMPLE_IP | PERF_SAMPLE_TID | \
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PERF_SAMPLE_TIME | PERF_SAMPLE_ADDR | \
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PERF_SAMPLE_ID | PERF_SAMPLE_STREAM_ID | \
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PERF_SAMPLE_CPU | PERF_SAMPLE_PERIOD)
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PERF_SAMPLE_CPU | PERF_SAMPLE_PERIOD | \
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PERF_SAMPLE_IDENTIFIER)
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struct sample_event {
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struct perf_event_header header;
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@ -49,6 +49,21 @@ struct perf_evlist *perf_evlist__new(void)
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return evlist;
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}
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/**
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* perf_evlist__set_id_pos - set the positions of event ids.
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* @evlist: selected event list
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*
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* Events with compatible sample types all have the same id_pos
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* and is_pos. For convenience, put a copy on evlist.
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*/
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void perf_evlist__set_id_pos(struct perf_evlist *evlist)
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{
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struct perf_evsel *first = perf_evlist__first(evlist);
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evlist->id_pos = first->id_pos;
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evlist->is_pos = first->is_pos;
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}
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static void perf_evlist__purge(struct perf_evlist *evlist)
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{
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struct perf_evsel *pos, *n;
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@ -79,15 +94,20 @@ void perf_evlist__delete(struct perf_evlist *evlist)
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void perf_evlist__add(struct perf_evlist *evlist, struct perf_evsel *entry)
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{
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list_add_tail(&entry->node, &evlist->entries);
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++evlist->nr_entries;
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if (!evlist->nr_entries++)
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perf_evlist__set_id_pos(evlist);
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}
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void perf_evlist__splice_list_tail(struct perf_evlist *evlist,
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struct list_head *list,
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int nr_entries)
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{
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bool set_id_pos = !evlist->nr_entries;
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list_splice_tail(list, &evlist->entries);
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evlist->nr_entries += nr_entries;
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if (set_id_pos)
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perf_evlist__set_id_pos(evlist);
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}
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void __perf_evlist__set_leader(struct list_head *list)
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@ -349,6 +369,55 @@ struct perf_evsel *perf_evlist__id2evsel(struct perf_evlist *evlist, u64 id)
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return NULL;
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}
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static int perf_evlist__event2id(struct perf_evlist *evlist,
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union perf_event *event, u64 *id)
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{
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const u64 *array = event->sample.array;
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ssize_t n;
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n = (event->header.size - sizeof(event->header)) >> 3;
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if (event->header.type == PERF_RECORD_SAMPLE) {
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if (evlist->id_pos >= n)
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return -1;
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*id = array[evlist->id_pos];
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} else {
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if (evlist->is_pos > n)
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return -1;
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n -= evlist->is_pos;
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*id = array[n];
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}
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return 0;
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}
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static struct perf_evsel *perf_evlist__event2evsel(struct perf_evlist *evlist,
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union perf_event *event)
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{
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struct hlist_head *head;
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struct perf_sample_id *sid;
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int hash;
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u64 id;
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if (evlist->nr_entries == 1)
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return perf_evlist__first(evlist);
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if (perf_evlist__event2id(evlist, event, &id))
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return NULL;
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/* Synthesized events have an id of zero */
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if (!id)
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return perf_evlist__first(evlist);
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hash = hash_64(id, PERF_EVLIST__HLIST_BITS);
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head = &evlist->heads[hash];
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hlist_for_each_entry(sid, head, node) {
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if (sid->id == id)
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return sid->evsel;
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}
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return NULL;
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}
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union perf_event *perf_evlist__mmap_read(struct perf_evlist *evlist, int idx)
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{
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struct perf_mmap *md = &evlist->mmap[idx];
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@ -659,20 +728,40 @@ int perf_evlist__set_filter(struct perf_evlist *evlist, const char *filter)
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bool perf_evlist__valid_sample_type(struct perf_evlist *evlist)
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{
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struct perf_evsel *first = perf_evlist__first(evlist), *pos = first;
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struct perf_evsel *pos;
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list_for_each_entry_continue(pos, &evlist->entries, node) {
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if (first->attr.sample_type != pos->attr.sample_type)
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if (evlist->nr_entries == 1)
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return true;
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if (evlist->id_pos < 0 || evlist->is_pos < 0)
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return false;
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list_for_each_entry(pos, &evlist->entries, node) {
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if (pos->id_pos != evlist->id_pos ||
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pos->is_pos != evlist->is_pos)
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return false;
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}
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return true;
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}
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u64 perf_evlist__sample_type(struct perf_evlist *evlist)
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u64 __perf_evlist__combined_sample_type(struct perf_evlist *evlist)
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{
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struct perf_evsel *first = perf_evlist__first(evlist);
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return first->attr.sample_type;
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struct perf_evsel *evsel;
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if (evlist->combined_sample_type)
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return evlist->combined_sample_type;
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list_for_each_entry(evsel, &evlist->entries, node)
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evlist->combined_sample_type |= evsel->attr.sample_type;
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return evlist->combined_sample_type;
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}
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u64 perf_evlist__combined_sample_type(struct perf_evlist *evlist)
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{
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evlist->combined_sample_type = 0;
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return __perf_evlist__combined_sample_type(evlist);
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}
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bool perf_evlist__valid_read_format(struct perf_evlist *evlist)
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@ -727,6 +816,9 @@ u16 perf_evlist__id_hdr_size(struct perf_evlist *evlist)
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if (sample_type & PERF_SAMPLE_CPU)
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size += sizeof(data->cpu) * 2;
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if (sample_type & PERF_SAMPLE_IDENTIFIER)
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size += sizeof(data->id);
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out:
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return size;
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}
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@ -885,7 +977,10 @@ int perf_evlist__start_workload(struct perf_evlist *evlist)
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int perf_evlist__parse_sample(struct perf_evlist *evlist, union perf_event *event,
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struct perf_sample *sample)
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{
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struct perf_evsel *evsel = perf_evlist__first(evlist);
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struct perf_evsel *evsel = perf_evlist__event2evsel(evlist, event);
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if (!evsel)
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return -EFAULT;
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return perf_evsel__parse_sample(evsel, event, sample);
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}
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@ -32,6 +32,9 @@ struct perf_evlist {
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int nr_fds;
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int nr_mmaps;
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int mmap_len;
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int id_pos;
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int is_pos;
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u64 combined_sample_type;
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struct {
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int cork_fd;
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pid_t pid;
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@ -85,6 +88,8 @@ union perf_event *perf_evlist__mmap_read(struct perf_evlist *self, int idx);
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int perf_evlist__open(struct perf_evlist *evlist);
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void perf_evlist__close(struct perf_evlist *evlist);
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void perf_evlist__set_id_pos(struct perf_evlist *evlist);
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bool perf_can_sample_identifier(void);
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void perf_evlist__config(struct perf_evlist *evlist,
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struct perf_record_opts *opts);
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@ -121,7 +126,8 @@ void __perf_evlist__set_leader(struct list_head *list);
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void perf_evlist__set_leader(struct perf_evlist *evlist);
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u64 perf_evlist__read_format(struct perf_evlist *evlist);
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u64 perf_evlist__sample_type(struct perf_evlist *evlist);
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u64 __perf_evlist__combined_sample_type(struct perf_evlist *evlist);
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u64 perf_evlist__combined_sample_type(struct perf_evlist *evlist);
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bool perf_evlist__sample_id_all(struct perf_evlist *evlist);
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u16 perf_evlist__id_hdr_size(struct perf_evlist *evlist);
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@ -31,7 +31,7 @@ static struct {
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#define FD(e, x, y) (*(int *)xyarray__entry(e->fd, x, y))
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static int __perf_evsel__sample_size(u64 sample_type)
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int __perf_evsel__sample_size(u64 sample_type)
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{
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u64 mask = sample_type & PERF_SAMPLE_MASK;
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int size = 0;
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@ -47,6 +47,72 @@ static int __perf_evsel__sample_size(u64 sample_type)
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return size;
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}
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/**
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* __perf_evsel__calc_id_pos - calculate id_pos.
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* @sample_type: sample type
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*
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* This function returns the position of the event id (PERF_SAMPLE_ID or
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* PERF_SAMPLE_IDENTIFIER) in a sample event i.e. in the array of struct
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* sample_event.
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*/
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static int __perf_evsel__calc_id_pos(u64 sample_type)
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{
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int idx = 0;
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if (sample_type & PERF_SAMPLE_IDENTIFIER)
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return 0;
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if (!(sample_type & PERF_SAMPLE_ID))
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return -1;
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if (sample_type & PERF_SAMPLE_IP)
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idx += 1;
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if (sample_type & PERF_SAMPLE_TID)
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idx += 1;
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if (sample_type & PERF_SAMPLE_TIME)
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idx += 1;
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if (sample_type & PERF_SAMPLE_ADDR)
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idx += 1;
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return idx;
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}
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/**
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* __perf_evsel__calc_is_pos - calculate is_pos.
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* @sample_type: sample type
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*
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* This function returns the position (counting backwards) of the event id
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* (PERF_SAMPLE_ID or PERF_SAMPLE_IDENTIFIER) in a non-sample event i.e. if
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* sample_id_all is used there is an id sample appended to non-sample events.
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*/
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static int __perf_evsel__calc_is_pos(u64 sample_type)
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{
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int idx = 1;
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if (sample_type & PERF_SAMPLE_IDENTIFIER)
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return 1;
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if (!(sample_type & PERF_SAMPLE_ID))
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return -1;
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if (sample_type & PERF_SAMPLE_CPU)
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idx += 1;
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if (sample_type & PERF_SAMPLE_STREAM_ID)
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idx += 1;
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return idx;
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}
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void perf_evsel__calc_id_pos(struct perf_evsel *evsel)
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{
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evsel->id_pos = __perf_evsel__calc_id_pos(evsel->attr.sample_type);
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evsel->is_pos = __perf_evsel__calc_is_pos(evsel->attr.sample_type);
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}
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void hists__init(struct hists *hists)
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{
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memset(hists, 0, sizeof(*hists));
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@ -63,6 +129,7 @@ void __perf_evsel__set_sample_bit(struct perf_evsel *evsel,
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if (!(evsel->attr.sample_type & bit)) {
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evsel->attr.sample_type |= bit;
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evsel->sample_size += sizeof(u64);
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perf_evsel__calc_id_pos(evsel);
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}
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}
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@ -72,12 +139,19 @@ void __perf_evsel__reset_sample_bit(struct perf_evsel *evsel,
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if (evsel->attr.sample_type & bit) {
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evsel->attr.sample_type &= ~bit;
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evsel->sample_size -= sizeof(u64);
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perf_evsel__calc_id_pos(evsel);
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}
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}
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void perf_evsel__set_sample_id(struct perf_evsel *evsel)
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void perf_evsel__set_sample_id(struct perf_evsel *evsel,
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bool can_sample_identifier)
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{
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perf_evsel__set_sample_bit(evsel, ID);
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if (can_sample_identifier) {
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perf_evsel__reset_sample_bit(evsel, ID);
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perf_evsel__set_sample_bit(evsel, IDENTIFIER);
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} else {
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perf_evsel__set_sample_bit(evsel, ID);
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}
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evsel->attr.read_format |= PERF_FORMAT_ID;
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}
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@ -90,6 +164,7 @@ void perf_evsel__init(struct perf_evsel *evsel,
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INIT_LIST_HEAD(&evsel->node);
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hists__init(&evsel->hists);
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evsel->sample_size = __perf_evsel__sample_size(attr->sample_type);
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perf_evsel__calc_id_pos(evsel);
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}
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struct perf_evsel *perf_evsel__new(struct perf_event_attr *attr, int idx)
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@ -509,7 +584,7 @@ void perf_evsel__config(struct perf_evsel *evsel,
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* We need ID even in case of single event, because
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* PERF_SAMPLE_READ process ID specific data.
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*/
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perf_evsel__set_sample_id(evsel);
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perf_evsel__set_sample_id(evsel, false);
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/*
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* Apply group format only if we belong to group
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@ -1088,6 +1163,11 @@ static int perf_evsel__parse_id_sample(const struct perf_evsel *evsel,
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array += ((event->header.size -
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sizeof(event->header)) / sizeof(u64)) - 1;
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if (type & PERF_SAMPLE_IDENTIFIER) {
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sample->id = *array;
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array--;
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}
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if (type & PERF_SAMPLE_CPU) {
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u.val64 = *array;
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if (swapped) {
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@ -1184,6 +1264,12 @@ int perf_evsel__parse_sample(struct perf_evsel *evsel, union perf_event *event,
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if (evsel->sample_size + sizeof(event->header) > event->header.size)
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return -EFAULT;
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data->id = -1ULL;
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if (type & PERF_SAMPLE_IDENTIFIER) {
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data->id = *array;
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array++;
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}
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if (type & PERF_SAMPLE_IP) {
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data->ip = *array;
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array++;
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@ -1214,7 +1300,6 @@ int perf_evsel__parse_sample(struct perf_evsel *evsel, union perf_event *event,
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array++;
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}
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data->id = -1ULL;
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if (type & PERF_SAMPLE_ID) {
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data->id = *array;
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array++;
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@ -1396,6 +1481,11 @@ int perf_event__synthesize_sample(union perf_event *event, u64 type,
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array = event->sample.array;
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if (type & PERF_SAMPLE_IDENTIFIER) {
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*array = sample->id;
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array++;
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}
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if (type & PERF_SAMPLE_IP) {
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*array = sample->ip;
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array++;
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@ -1584,6 +1674,7 @@ static int sample_type__fprintf(FILE *fp, bool *first, u64 value)
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bit_name(READ), bit_name(CALLCHAIN), bit_name(ID), bit_name(CPU),
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bit_name(PERIOD), bit_name(STREAM_ID), bit_name(RAW),
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bit_name(BRANCH_STACK), bit_name(REGS_USER), bit_name(STACK_USER),
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bit_name(IDENTIFIER),
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{ .name = NULL, }
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};
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#undef bit_name
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@ -48,6 +48,12 @@ struct perf_sample_id {
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* @name - Can be set to retain the original event name passed by the user,
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* so that when showing results in tools such as 'perf stat', we
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* show the name used, not some alias.
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* @id_pos: the position of the event id (PERF_SAMPLE_ID or
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* PERF_SAMPLE_IDENTIFIER) in a sample event i.e. in the array of
|
||||
* struct sample_event
|
||||
* @is_pos: the position (counting backwards) of the event id (PERF_SAMPLE_ID or
|
||||
* PERF_SAMPLE_IDENTIFIER) in a non-sample event i.e. if sample_id_all
|
||||
* is used there is an id sample appended to non-sample events
|
||||
*/
|
||||
struct perf_evsel {
|
||||
struct list_head node;
|
||||
|
|
@ -74,6 +80,8 @@ struct perf_evsel {
|
|||
} handler;
|
||||
struct cpu_map *cpus;
|
||||
unsigned int sample_size;
|
||||
int id_pos;
|
||||
int is_pos;
|
||||
bool supported;
|
||||
bool needs_swap;
|
||||
/* parse modifier helper */
|
||||
|
|
@ -104,6 +112,9 @@ void perf_evsel__delete(struct perf_evsel *evsel);
|
|||
void perf_evsel__config(struct perf_evsel *evsel,
|
||||
struct perf_record_opts *opts);
|
||||
|
||||
int __perf_evsel__sample_size(u64 sample_type);
|
||||
void perf_evsel__calc_id_pos(struct perf_evsel *evsel);
|
||||
|
||||
bool perf_evsel__is_cache_op_valid(u8 type, u8 op);
|
||||
|
||||
#define PERF_EVSEL__MAX_ALIASES 8
|
||||
|
|
@ -142,7 +153,8 @@ void __perf_evsel__reset_sample_bit(struct perf_evsel *evsel,
|
|||
#define perf_evsel__reset_sample_bit(evsel, bit) \
|
||||
__perf_evsel__reset_sample_bit(evsel, PERF_SAMPLE_##bit)
|
||||
|
||||
void perf_evsel__set_sample_id(struct perf_evsel *evsel);
|
||||
void perf_evsel__set_sample_id(struct perf_evsel *evsel,
|
||||
bool use_sample_identifier);
|
||||
|
||||
int perf_evsel__set_filter(struct perf_evsel *evsel, int ncpus, int nthreads,
|
||||
const char *filter);
|
||||
|
|
|
|||
|
|
@ -1,11 +1,83 @@
|
|||
#include "evlist.h"
|
||||
#include "evsel.h"
|
||||
#include "cpumap.h"
|
||||
#include "parse-events.h"
|
||||
|
||||
typedef void (*setup_probe_fn_t)(struct perf_evsel *evsel);
|
||||
|
||||
static int perf_do_probe_api(setup_probe_fn_t fn, int cpu, const char *str)
|
||||
{
|
||||
struct perf_evlist *evlist;
|
||||
struct perf_evsel *evsel;
|
||||
int err = -EAGAIN, fd;
|
||||
|
||||
evlist = perf_evlist__new();
|
||||
if (!evlist)
|
||||
return -ENOMEM;
|
||||
|
||||
if (parse_events(evlist, str))
|
||||
goto out_delete;
|
||||
|
||||
evsel = perf_evlist__first(evlist);
|
||||
|
||||
fd = sys_perf_event_open(&evsel->attr, -1, cpu, -1, 0);
|
||||
if (fd < 0)
|
||||
goto out_delete;
|
||||
close(fd);
|
||||
|
||||
fn(evsel);
|
||||
|
||||
fd = sys_perf_event_open(&evsel->attr, -1, cpu, -1, 0);
|
||||
if (fd < 0) {
|
||||
if (errno == EINVAL)
|
||||
err = -EINVAL;
|
||||
goto out_delete;
|
||||
}
|
||||
close(fd);
|
||||
err = 0;
|
||||
|
||||
out_delete:
|
||||
perf_evlist__delete(evlist);
|
||||
return err;
|
||||
}
|
||||
|
||||
static bool perf_probe_api(setup_probe_fn_t fn)
|
||||
{
|
||||
const char *try[] = {"cycles:u", "instructions:u", "cpu-clock", NULL};
|
||||
struct cpu_map *cpus;
|
||||
int cpu, ret, i = 0;
|
||||
|
||||
cpus = cpu_map__new(NULL);
|
||||
if (!cpus)
|
||||
return false;
|
||||
cpu = cpus->map[0];
|
||||
cpu_map__delete(cpus);
|
||||
|
||||
do {
|
||||
ret = perf_do_probe_api(fn, cpu, try[i++]);
|
||||
if (!ret)
|
||||
return true;
|
||||
} while (ret == -EAGAIN && try[i]);
|
||||
|
||||
return false;
|
||||
}
|
||||
|
||||
static void perf_probe_sample_identifier(struct perf_evsel *evsel)
|
||||
{
|
||||
evsel->attr.sample_type |= PERF_SAMPLE_IDENTIFIER;
|
||||
}
|
||||
|
||||
bool perf_can_sample_identifier(void)
|
||||
{
|
||||
return perf_probe_api(perf_probe_sample_identifier);
|
||||
}
|
||||
|
||||
void perf_evlist__config(struct perf_evlist *evlist,
|
||||
struct perf_record_opts *opts)
|
||||
{
|
||||
struct perf_evsel *evsel;
|
||||
bool use_sample_identifier = false;
|
||||
|
||||
/*
|
||||
* Set the evsel leader links before we configure attributes,
|
||||
* since some might depend on this info.
|
||||
|
|
@ -16,10 +88,21 @@ void perf_evlist__config(struct perf_evlist *evlist,
|
|||
if (evlist->cpus->map[0] < 0)
|
||||
opts->no_inherit = true;
|
||||
|
||||
list_for_each_entry(evsel, &evlist->entries, node) {
|
||||
list_for_each_entry(evsel, &evlist->entries, node)
|
||||
perf_evsel__config(evsel, opts);
|
||||
|
||||
if (evlist->nr_entries > 1)
|
||||
perf_evsel__set_sample_id(evsel);
|
||||
if (evlist->nr_entries > 1) {
|
||||
struct perf_evsel *first = perf_evlist__first(evlist);
|
||||
|
||||
list_for_each_entry(evsel, &evlist->entries, node) {
|
||||
if (evsel->attr.sample_type == first->attr.sample_type)
|
||||
continue;
|
||||
use_sample_identifier = perf_can_sample_identifier();
|
||||
break;
|
||||
}
|
||||
list_for_each_entry(evsel, &evlist->entries, node)
|
||||
perf_evsel__set_sample_id(evsel, use_sample_identifier);
|
||||
}
|
||||
|
||||
perf_evlist__set_id_pos(evlist);
|
||||
}
|
||||
|
|
|
|||
|
|
@ -739,7 +739,7 @@ static void perf_session__print_tstamp(struct perf_session *session,
|
|||
union perf_event *event,
|
||||
struct perf_sample *sample)
|
||||
{
|
||||
u64 sample_type = perf_evlist__sample_type(session->evlist);
|
||||
u64 sample_type = __perf_evlist__combined_sample_type(session->evlist);
|
||||
|
||||
if (event->header.type != PERF_RECORD_SAMPLE &&
|
||||
!perf_evlist__sample_id_all(session->evlist)) {
|
||||
|
|
|
|||
Loading…
Add table
Add a link
Reference in a new issue