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Subject[PATCH 16/57] perf c2c report: Add sample processing
Date
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.

Link: http://lkml.kernel.org/n/tip-ksr9smz4o1t040h50z28dds2@git.kernel.org
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
---
tools/perf/builtin-c2c.c | 108 ++++++++++++++++++++++++++++++++++++++++++++++-
1 file changed, 107 insertions(+), 1 deletion(-)

diff --git a/tools/perf/builtin-c2c.c b/tools/perf/builtin-c2c.c
index a3481f86e2ae..29fb9573e292 100644
--- 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:
--
2.7.4
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