Dispatch Trace Log details are captured as-is in PERF_RECORD_AUXTRACE
records. To present dtl entries as samples, create an event with name as
"vpa-dtl" and type PERF_TYPE_SYNTH. Add perf_synth_id,
"PERF_SYNTH_POWERPC_VPA_DTL" as config value for the event. Create a
sample id to be a fixed offset from evsel id.
To present the relevant fields from the "struct dtl_entry",
prepare the entries as events of type PERF_TYPE_SYNTH. By
defining as PERF_TYPE_SYNTH type, samples can be printed as part of
perf_sample__fprintf_synth in builtin-script.c
>From powerpc_vpadtl_process_auxtrace_info(), invoke
auxtrace_queues__process_index() function which will queue the
auxtrace buffers by invoke auxtrace_queues__add_event().
Signed-off-by: Athira Rajeev <atraj...@linux.ibm.com>
---
tools/perf/util/event.h | 1 +
tools/perf/util/powerpc-vpadtl.c | 75 ++++++++++++++++++++++++++++++++
2 files changed, 76 insertions(+)
diff --git a/tools/perf/util/event.h b/tools/perf/util/event.h
index e40d16d3246c..eea21a542b22 100644
--- a/tools/perf/util/event.h
+++ b/tools/perf/util/event.h
@@ -117,6 +117,7 @@ enum perf_synth_id {
PERF_SYNTH_INTEL_PSB,
PERF_SYNTH_INTEL_EVT,
PERF_SYNTH_INTEL_IFLAG_CHG,
+ PERF_SYNTH_POWERPC_VPA_DTL,
};
/*
diff --git a/tools/perf/util/powerpc-vpadtl.c b/tools/perf/util/powerpc-vpadtl.c
index ea7b59c45f4a..36c02821cf0a 100644
--- a/tools/perf/util/powerpc-vpadtl.c
+++ b/tools/perf/util/powerpc-vpadtl.c
@@ -56,6 +56,7 @@ struct powerpc_vpadtl {
struct perf_session *session;
struct machine *machine;
u32 pmu_type;
+ u64 sample_id;
};
struct boottb_freq {
@@ -250,6 +251,65 @@ static void powerpc_vpadtl_print_info(__u64 *arr)
fprintf(stdout, powerpc_vpadtl_info_fmts[POWERPC_VPADTL_TYPE],
arr[POWERPC_VPADTL_TYPE]);
}
+static void set_event_name(struct evlist *evlist, u64 id,
+ const char *name)
+{
+ struct evsel *evsel;
+
+ evlist__for_each_entry(evlist, evsel) {
+ if (evsel->core.id && evsel->core.id[0] == id) {
+ if (evsel->name)
+ zfree(&evsel->name);
+ evsel->name = strdup(name);
+ break;
+ }
+ }
+}
+
+static int
+powerpc_vpadtl_synth_events(struct powerpc_vpadtl *vpa, struct perf_session
*session)
+{
+ struct evlist *evlist = session->evlist;
+ struct evsel *evsel;
+ struct perf_event_attr attr;
+ bool found = false;
+ u64 id;
+ int err;
+
+ evlist__for_each_entry(evlist, evsel) {
+ if (evsel->core.attr.type == vpa->pmu_type) {
+ found = true;
+ break;
+ }
+ }
+
+ if (!found) {
+ pr_debug("No selected events with VPA trace data\n");
+ return 0;
+ }
+
+ memset(&attr, 0, sizeof(struct perf_event_attr));
+ attr.size = sizeof(struct perf_event_attr);
+ attr.sample_type = evsel->core.attr.sample_type;
+ attr.sample_id_all = evsel->core.attr.sample_id_all;
+ attr.type = PERF_TYPE_SYNTH;
+ attr.config = PERF_SYNTH_POWERPC_VPA_DTL;
+
+ /* create new id val to be a fixed offset from evsel id */
+ id = evsel->core.id[0] + 1000000000;
+ if (!id)
+ id = 1;
+
+ err = perf_session__deliver_synth_attr_event(session, &attr, id);
+ if (err)
+ return err;
+
+ vpa->sample_id = id;
+ set_event_name(evlist, id, "vpa-dtl");
+
+ return 0;
+}
+
/*
* Process the PERF_RECORD_AUXTRACE_INFO records and setup
* the infrastructure to process auxtrace events. PERF_RECORD_AUXTRACE_INFO
@@ -291,8 +351,23 @@ int powerpc_vpadtl_process_auxtrace_info(union perf_event
*event,
powerpc_vpadtl_print_info(&auxtrace_info->priv[0]);
+ if (dump_trace)
+ return 0;
+
+ err = powerpc_vpadtl_synth_events(vpa, session);
+ if (err)
+ goto err_free_queues;
+
+ err = auxtrace_queues__process_index(&vpa->queues, session);
+ if (err)
+ goto err_free_queues;
+
return 0;
+err_free_queues:
+ auxtrace_queues__free(&vpa->queues);
+ session->auxtrace = NULL;
+
err_free:
free(vpa);
return err;
--
2.47.1
