perf session: There is no need for a per session hists instance

It was being used just for its stats member, so ditch session->hists and
use just what is needed, session->stats.

This completes the move support multiple events in the hists layer, the
last user of session->hists was 'perf diff' but Jiri Olsa has fixed that
some time ago.

Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
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/n/tip-pimk92kek8kcp4dmb1jakoro@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

diff --git a/tools/perf/builtin-sched.c b/tools/perf/builtin-sched.c
index cc28b85..1382294 100644 (file)
--- a/tools/perf/builtin-sched.c
+++ b/tools/perf/builtin-sched.c
@@ -1475,9 +1475,9 @@ static int perf_sched__read_events(struct perf_sched *sched, bool destroy,
                        goto out_delete;
                }
 
-               sched->nr_events      = session->hists.stats.nr_events[0];
-               sched->nr_lost_events = session->hists.stats.total_lost;
-               sched->nr_lost_chunks = session->hists.stats.nr_events[PERF_RECORD_LOST];
+               sched->nr_events      = session->stats.nr_events[0];
+               sched->nr_lost_events = session->stats.total_lost;
+               sched->nr_lost_chunks = session->stats.nr_events[PERF_RECORD_LOST];
        }
 
        if (destroy)

diff --git a/tools/perf/builtin-top.c b/tools/perf/builtin-top.c
index f5fd260..996b10c 100644 (file)
--- a/tools/perf/builtin-top.c
+++ b/tools/perf/builtin-top.c
@@ -728,7 +728,7 @@ static void perf_event__process_sample(struct perf_tool *tool,
 
        if (!machine) {
                pr_err("%u unprocessable samples recorded.\n",
-                      top->session->hists.stats.nr_unprocessable_samples++);
+                      top->session->stats.nr_unprocessable_samples++);
                return;
        }
 
@@ -878,7 +878,7 @@ static void perf_top__mmap_read_idx(struct perf_top *top, int idx)
                        hists__inc_nr_events(&evsel->hists, event->header.type);
                        machine__process_event(machine, event);
                } else
-                       ++session->hists.stats.nr_unknown_events;
+                       ++session->stats.nr_unknown_events;
        }
 }
 

diff --git a/tools/perf/util/hist.c b/tools/perf/util/hist.c
index 37179af..965ebf9 100644 (file)
--- a/tools/perf/util/hist.c
+++ b/tools/perf/util/hist.c
@@ -717,10 +717,15 @@ int hist_entry__annotate(struct hist_entry *he, size_t privsize)
        return symbol__annotate(he->ms.sym, he->ms.map, privsize);
 }
 
+void events_stats__inc(struct events_stats *stats, u32 type)
+{
+       ++stats->nr_events[0];
+       ++stats->nr_events[type];
+}
+
 void hists__inc_nr_events(struct hists *hists, u32 type)
 {
-       ++hists->stats.nr_events[0];
-       ++hists->stats.nr_events[type];
+       events_stats__inc(&hists->stats, type);
 }
 
 static struct hist_entry *hists__add_dummy_entry(struct hists *hists,

diff --git a/tools/perf/util/hist.h b/tools/perf/util/hist.h
index cb6533b..3862468 100644 (file)
--- a/tools/perf/util/hist.h
+++ b/tools/perf/util/hist.h
@@ -98,6 +98,7 @@ void hists__output_recalc_col_len(struct hists *hists, int max_rows);
 
 void hists__inc_nr_entries(struct hists *hists, struct hist_entry *h);
 void hists__inc_nr_events(struct hists *self, u32 type);
+void events_stats__inc(struct events_stats *stats, u32 type);
 size_t events_stats__fprintf(struct events_stats *stats, FILE *fp);
 
 size_t hists__fprintf(struct hists *self, bool show_header, int max_rows,

diff --git a/tools/perf/util/session.c b/tools/perf/util/session.c
index 6e8dd2a..b0bcc32 100644 (file)
--- a/tools/perf/util/session.c
+++ b/tools/perf/util/session.c
@@ -133,7 +133,6 @@ struct perf_session *perf_session__new(const char *filename, int mode,
        INIT_LIST_HEAD(&self->ordered_samples.sample_cache);
        INIT_LIST_HEAD(&self->ordered_samples.to_free);
        machine__init(&self->host_machine, "", HOST_KERNEL_ID);
-       hists__init(&self->hists);
 
        if (mode == O_RDONLY) {
                if (perf_session__open(self, force) < 0)
@@ -863,11 +862,11 @@ static int perf_session_deliver_event(struct perf_session *session,
        case PERF_RECORD_SAMPLE:
                dump_sample(evsel, event, sample);
                if (evsel == NULL) {
-                       ++session->hists.stats.nr_unknown_id;
+                       ++session->stats.nr_unknown_id;
                        return 0;
                }
                if (machine == NULL) {
-                       ++session->hists.stats.nr_unprocessable_samples;
+                       ++session->stats.nr_unprocessable_samples;
                        return 0;
                }
                return tool->sample(tool, event, sample, evsel, machine);
@@ -881,7 +880,7 @@ static int perf_session_deliver_event(struct perf_session *session,
                return tool->exit(tool, event, sample, machine);
        case PERF_RECORD_LOST:
                if (tool->lost == perf_event__process_lost)
-                       session->hists.stats.total_lost += event->lost.lost;
+                       session->stats.total_lost += event->lost.lost;
                return tool->lost(tool, event, sample, machine);
        case PERF_RECORD_READ:
                return tool->read(tool, event, sample, evsel, machine);
@@ -890,7 +889,7 @@ static int perf_session_deliver_event(struct perf_session *session,
        case PERF_RECORD_UNTHROTTLE:
                return tool->unthrottle(tool, event, sample, machine);
        default:
-               ++session->hists.stats.nr_unknown_events;
+               ++session->stats.nr_unknown_events;
                return -1;
        }
 }
@@ -904,8 +903,8 @@ static int perf_session__preprocess_sample(struct perf_session *session,
 
        if (!ip_callchain__valid(sample->callchain, event)) {
                pr_debug("call-chain problem with event, skipping it.\n");
-               ++session->hists.stats.nr_invalid_chains;
-               session->hists.stats.total_invalid_chains += sample->period;
+               ++session->stats.nr_invalid_chains;
+               session->stats.total_invalid_chains += sample->period;
                return -EINVAL;
        }
        return 0;
@@ -963,7 +962,7 @@ static int perf_session__process_event(struct perf_session *session,
        if (event->header.type >= PERF_RECORD_HEADER_MAX)
                return -EINVAL;
 
-       hists__inc_nr_events(&session->hists, event->header.type);
+       events_stats__inc(&session->stats, event->header.type);
 
        if (event->header.type >= PERF_RECORD_USER_TYPE_START)
                return perf_session__process_user_event(session, event, tool, file_offset);
@@ -1018,39 +1017,39 @@ static void perf_session__warn_about_errors(const struct perf_session *session,
                                            const struct perf_tool *tool)
 {
        if (tool->lost == perf_event__process_lost &&
-           session->hists.stats.nr_events[PERF_RECORD_LOST] != 0) {
+           session->stats.nr_events[PERF_RECORD_LOST] != 0) {
                ui__warning("Processed %d events and lost %d chunks!\n\n"
                            "Check IO/CPU overload!\n\n",
-                           session->hists.stats.nr_events[0],
-                           session->hists.stats.nr_events[PERF_RECORD_LOST]);
+                           session->stats.nr_events[0],
+                           session->stats.nr_events[PERF_RECORD_LOST]);
        }
 
-       if (session->hists.stats.nr_unknown_events != 0) {
+       if (session->stats.nr_unknown_events != 0) {
                ui__warning("Found %u unknown events!\n\n"
                            "Is this an older tool processing a perf.data "
                            "file generated by a more recent tool?\n\n"
                            "If that is not the case, consider "
                            "reporting to linux-kernel@vger.kernel.org.\n\n",
-                           session->hists.stats.nr_unknown_events);
+                           session->stats.nr_unknown_events);
        }
 
-       if (session->hists.stats.nr_unknown_id != 0) {
+       if (session->stats.nr_unknown_id != 0) {
                ui__warning("%u samples with id not present in the header\n",
-                           session->hists.stats.nr_unknown_id);
+                           session->stats.nr_unknown_id);
        }
 
-       if (session->hists.stats.nr_invalid_chains != 0) {
+       if (session->stats.nr_invalid_chains != 0) {
                ui__warning("Found invalid callchains!\n\n"
                            "%u out of %u events were discarded for this reason.\n\n"
                            "Consider reporting to linux-kernel@vger.kernel.org.\n\n",
-                           session->hists.stats.nr_invalid_chains,
-                           session->hists.stats.nr_events[PERF_RECORD_SAMPLE]);
+                           session->stats.nr_invalid_chains,
+                           session->stats.nr_events[PERF_RECORD_SAMPLE]);
        }
 
-       if (session->hists.stats.nr_unprocessable_samples != 0) {
+       if (session->stats.nr_unprocessable_samples != 0) {
                ui__warning("%u unprocessable samples recorded.\n"
                            "Do you have a KVM guest running and not using 'perf kvm'?\n",
-                           session->hists.stats.nr_unprocessable_samples);
+                           session->stats.nr_unprocessable_samples);
        }
 }
 
@@ -1353,7 +1352,7 @@ size_t perf_session__fprintf_nr_events(struct perf_session *session, FILE *fp)
        struct perf_evsel *pos;
        size_t ret = fprintf(fp, "Aggregated stats:\n");
 
-       ret += events_stats__fprintf(&session->hists.stats, fp);
+       ret += events_stats__fprintf(&session->stats, fp);
 
        list_for_each_entry(pos, &session->evlist->entries, node) {
                ret += fprintf(fp, "%s stats:\n", perf_evsel__name(pos));

diff --git a/tools/perf/util/session.h b/tools/perf/util/session.h
index 426ca0c..57066cb 100644 (file)
--- a/tools/perf/util/session.h
+++ b/tools/perf/util/session.h
@@ -34,11 +34,7 @@ struct perf_session {
        struct rb_root          machines;
        struct perf_evlist      *evlist;
        struct pevent           *pevent;
-       /*
-        * FIXME: Need to split this up further, we need global
-        *        stats + per event stats.
-        */
-       struct hists            hists;
+       struct events_stats     stats;
        int                     fd;
        bool                    fd_pipe;
        bool                    repipe;