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-rw-r--r--tools/perf/arch/arm64/util/arm-spe.c6
-rw-r--r--tools/perf/util/arm-spe.c25
2 files changed, 30 insertions, 1 deletions
diff --git a/tools/perf/arch/arm64/util/arm-spe.c b/tools/perf/arch/arm64/util/arm-spe.c
index 56785034fc84..d32431ac15cc 100644
--- a/tools/perf/arch/arm64/util/arm-spe.c
+++ b/tools/perf/arch/arm64/util/arm-spe.c
@@ -251,8 +251,12 @@ static int arm_spe_recording_options(struct auxtrace_record *itr,
tracking_evsel->core.attr.sample_period = 1;
/* In per-cpu case, always need the time of mmap events etc */
- if (!perf_cpu_map__empty(cpus))
+ if (!perf_cpu_map__empty(cpus)) {
evsel__set_sample_bit(tracking_evsel, TIME);
+ evsel__set_sample_bit(tracking_evsel, CPU);
+ /* also track task context switch */
+ tracking_evsel->core.attr.context_switch = 1;
+ }
return 0;
}
diff --git a/tools/perf/util/arm-spe.c b/tools/perf/util/arm-spe.c
index 2196291976d9..9e3a6c54801d 100644
--- a/tools/perf/util/arm-spe.c
+++ b/tools/perf/util/arm-spe.c
@@ -681,6 +681,25 @@ static int arm_spe_process_timeless_queues(struct arm_spe *spe, pid_t tid,
return 0;
}
+static int arm_spe_context_switch(struct arm_spe *spe, union perf_event *event,
+ struct perf_sample *sample)
+{
+ pid_t pid, tid;
+ int cpu;
+
+ if (!(event->header.misc & PERF_RECORD_MISC_SWITCH_OUT))
+ return 0;
+
+ pid = event->context_switch.next_prev_pid;
+ tid = event->context_switch.next_prev_tid;
+ cpu = sample->cpu;
+
+ if (tid == -1)
+ pr_warning("context_switch event has no tid\n");
+
+ return machine__set_current_tid(spe->machine, cpu, pid, tid);
+}
+
static int arm_spe_process_event(struct perf_session *session,
union perf_event *event,
struct perf_sample *sample,
@@ -718,6 +737,12 @@ static int arm_spe_process_event(struct perf_session *session,
}
} else if (timestamp) {
err = arm_spe_process_queues(spe, timestamp);
+ if (err)
+ return err;
+
+ if (event->header.type == PERF_RECORD_SWITCH_CPU_WIDE ||
+ event->header.type == PERF_RECORD_SWITCH)
+ err = arm_spe_context_switch(spe, event, sample);
}
return err;