[PATCH V3 05/10] perf tools: Add API probes for new clock IDs

Adrian Hunter
2022-03-07T08:53:51Z

Add ability to check whether the kernel supports new clock IDs
CLOCK_PERF_HW_CLOCK and CLOCK_PERF_HW_CLOCK_NS.
They will be used in a subsequent patch.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
---
tools/perf/util/perf_api_probe.c | 23 +++++++++++++++++++++++
tools/perf/util/perf_api_probe.h | 2 ++
2 files changed, 25 insertions(+)

diff --git a/tools/perf/util/perf_api_probe.c b/tools/perf/util/perf_api_probe.c
index c28dd50bd571..e3004791d45c 100644
--- a/tools/perf/util/perf_api_probe.c
+++ b/tools/perf/util/perf_api_probe.c
@@ -5,6 +5,7 @@
#include "util/evlist.h"
#include "util/evsel.h"
#include "util/parse-events.h"
+#include "util/clockid.h"
#include "util/perf_api_probe.h"
#include <perf/cpumap.h>
#include <errno.h>
@@ -109,6 +110,18 @@ static void perf_probe_cgroup(struct evsel *evsel)
evsel->core.attr.cgroup = 1;
}

+static void perf_probe_hw_clock(struct evsel *evsel)
+{
+ evsel->core.attr.use_clockid = 1;
+ evsel->core.attr.clockid = CLOCK_PERF_HW_CLOCK;
+}
+
+static void perf_probe_hw_clock_ns(struct evsel *evsel)
+{
+ evsel->core.attr.use_clockid = 1;
+ evsel->core.attr.clockid = CLOCK_PERF_HW_CLOCK_NS;
+}
+
bool perf_can_sample_identifier(void)
{
return perf_probe_api(perf_probe_sample_identifier);
@@ -195,3 +208,13 @@ bool perf_can_record_cgroup(void)
{
return perf_probe_api(perf_probe_cgroup);
}
+
+bool perf_can_perf_clock_hw_clock(void)
+{
+ return perf_probe_api(perf_probe_hw_clock);
+}
+
+bool perf_can_perf_clock_hw_clock_ns(void)
+{
+ return perf_probe_api(perf_probe_hw_clock_ns);
+}
diff --git a/tools/perf/util/perf_api_probe.h b/tools/perf/util/perf_api_probe.h
index b104168efb15..5b30cbd260cf 100644
--- a/tools/perf/util/perf_api_probe.h
+++ b/tools/perf/util/perf_api_probe.h
@@ -13,5 +13,7 @@ bool perf_can_record_text_poke_events(void);
bool perf_can_sample_identifier(void);
bool perf_can_record_build_id(void);
bool perf_can_record_cgroup(void);
+bool perf_can_perf_clock_hw_clock(void);
+bool perf_can_perf_clock_hw_clock_ns(void);

#endif // __PERF_API_PROBE_H
--
2.25.1