perf c2c report: Add sample processing

Adding basic sample processing specific hist_entry allocation callbacks
(via hists__add_entry_ops).

Overloading 'struct hist_entry' object with new 'struct c2c_hist_entry'.
The new hist entry object will carry specific stats and nested hists
objects.

Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Don Zickus <dzickus@redhat.com>
Cc: Joe Mario <jmario@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1474558645-19956-17-git-send-email-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

diff --git a/tools/perf/builtin-c2c.c b/tools/perf/builtin-c2c.c
index a3481f86e2ae1aa049fc66afd39e413fa8bcc1d6..29fb9573e292d84f634f1a2b27b1af8f9cd6c88e 100644 (file)
--- a/tools/perf/builtin-c2c.c
+++ b/tools/perf/builtin-c2c.c
@@ -16,6 +16,15 @@ struct c2c_hists {
        struct perf_hpp_list    list;
 };
 
+struct c2c_hist_entry {
+       struct c2c_hists        *hists;
+       /*
+        * must be at the end,
+        * because of its callchain dynamic entry
+        */
+       struct hist_entry       he;
+};
+
 struct perf_c2c {
        struct perf_tool        tool;
        struct c2c_hists        hists;
@@ -23,6 +32,86 @@ struct perf_c2c {
 
 static struct perf_c2c c2c;
 
+static void *c2c_he_zalloc(size_t size)
+{
+       struct c2c_hist_entry *c2c_he;
+
+       c2c_he = zalloc(size + sizeof(*c2c_he));
+       if (!c2c_he)
+               return NULL;
+
+       return &c2c_he->he;
+}
+
+static void c2c_he_free(void *he)
+{
+       struct c2c_hist_entry *c2c_he;
+
+       c2c_he = container_of(he, struct c2c_hist_entry, he);
+       if (c2c_he->hists) {
+               hists__delete_entries(&c2c_he->hists->hists);
+               free(c2c_he->hists);
+       }
+
+       free(c2c_he);
+}
+
+static struct hist_entry_ops c2c_entry_ops = {
+       .new    = c2c_he_zalloc,
+       .free   = c2c_he_free,
+};
+
+static int process_sample_event(struct perf_tool *tool __maybe_unused,
+                               union perf_event *event,
+                               struct perf_sample *sample,
+                               struct perf_evsel *evsel __maybe_unused,
+                               struct machine *machine)
+{
+       struct hists *hists = &c2c.hists.hists;
+       struct hist_entry *he;
+       struct addr_location al;
+       struct mem_info *mi;
+       int ret;
+
+       if (machine__resolve(machine, &al, sample) < 0) {
+               pr_debug("problem processing %d event, skipping it.\n",
+                        event->header.type);
+               return -1;
+       }
+
+       mi = sample__resolve_mem(sample, &al);
+       if (mi == NULL)
+               return -ENOMEM;
+
+       he = hists__add_entry_ops(hists, &c2c_entry_ops,
+                                 &al, NULL, NULL, mi,
+                                 sample, true);
+       if (he == NULL) {
+               free(mi);
+               return -ENOMEM;
+       }
+
+       hists__inc_nr_samples(hists, he->filtered);
+       ret = hist_entry__append_callchain(he, sample);
+
+       addr_location__put(&al);
+       return ret;
+}
+
+static struct perf_c2c c2c = {
+       .tool = {
+               .sample         = process_sample_event,
+               .mmap           = perf_event__process_mmap,
+               .mmap2          = perf_event__process_mmap2,
+               .comm           = perf_event__process_comm,
+               .exit           = perf_event__process_exit,
+               .fork           = perf_event__process_fork,
+               .lost           = perf_event__process_lost,
+               .ordered_events = true,
+               .ordering_requires_timestamps = true,
+       },
+};
+
 static const char * const c2c_usage[] = {
        "perf c2c {record|report}",
        NULL
@@ -314,6 +403,7 @@ static int c2c_hists__reinit(struct c2c_hists *c2c_hists,
 static int perf_c2c__report(int argc, const char **argv)
 {
        struct perf_session *session;
+       struct ui_progress prog;
        struct perf_data_file file = {
                .mode = PERF_DATA_MODE_READ,
        };
@@ -330,9 +420,12 @@ static int perf_c2c__report(int argc, const char **argv)
 
        argc = parse_options(argc, argv, c2c_options, report_c2c_usage,
                             PARSE_OPT_STOP_AT_NON_OPTION);
-       if (!argc)
+       if (argc)
                usage_with_options(report_c2c_usage, c2c_options);
 
+       if (!input_name || !strlen(input_name))
+               input_name = "perf.data";
+
        file.path = input_name;
 
        err = c2c_hists__init(&c2c.hists, "dcacheline");
@@ -356,6 +449,19 @@ static int perf_c2c__report(int argc, const char **argv)
                goto out_session;
        }
 
+       err = perf_session__process_events(session);
+       if (err) {
+               pr_err("failed to process sample\n");
+               goto out_session;
+       }
+
+       ui_progress__init(&prog, c2c.hists.hists.nr_entries, "Sorting...");
+
+       hists__collapse_resort(&c2c.hists.hists, NULL);
+       hists__output_resort(&c2c.hists.hists, &prog);
+
+       ui_progress__finish();
+
 out_session:
        perf_session__delete(session);
 out: