linux-kernel - [PATCH 06/11] perf tools: Add new clock IDs to "perf time to TSC" test

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Date:   Wed,  9 Feb 2022 10:49:24 +0200
From:   Adrian Hunter <adrian.hunter@...el.com>
To:     Peter Zijlstra <peterz@...radead.org>
Cc:     Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Arnaldo Carvalho de Melo <acme@...nel.org>,
        Jiri Olsa <jolsa@...hat.com>, linux-kernel@...r.kernel.org,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
        Dave Hansen <dave.hansen@...ux.intel.com>, x86@...nel.org,
        kvm@...r.kernel.org, H Peter Anvin <hpa@...or.com>,
        Mathieu Poirier <mathieu.poirier@...aro.org>,
        Suzuki K Poulose <suzuki.poulose@....com>,
        Leo Yan <leo.yan@...aro.org>
Subject: [PATCH 06/11] perf tools: Add new clock IDs to "perf time to TSC" test

The same "Convert perf time to TSC" test can be used with new clock IDs
CLOCK_PERF_HW_CLOCK and CLOCK_PERF_HW_CLOCK_NS.

Signed-off-by: Adrian Hunter <adrian.hunter@...el.com>
---
 tools/perf/tests/perf-time-to-tsc.c | 41 ++++++++++++++++++++++-------
 1 file changed, 32 insertions(+), 9 deletions(-)

diff --git a/tools/perf/tests/perf-time-to-tsc.c b/tools/perf/tests/perf-time-to-tsc.c
index d12d0ad81801..1044bc4acacb 100644
--- a/tools/perf/tests/perf-time-to-tsc.c
+++ b/tools/perf/tests/perf-time-to-tsc.c
@@ -22,6 +22,7 @@
 #include "tests.h"
 #include "pmu.h"
 #include "pmu-hybrid.h"
+#include "perf_api_probe.h"
 
 /*
  * Except x86_64/i386 and Arm64, other archs don't support TSC in perf.  Just
@@ -47,15 +48,7 @@
 	}					\
 }
 
-/**
- * test__perf_time_to_tsc - test converting perf time to TSC.
- *
- * This function implements a test that checks that the conversion of perf time
- * to and from TSC is consistent with the order of events.  If the test passes
- * %0 is returned, otherwise %-1 is returned.  If TSC conversion is not
- * supported then then the test passes but " (not supported)" is printed.
- */
-static int test__perf_time_to_tsc(struct test_suite *test __maybe_unused, int subtest __maybe_unused)
+static int perf_time_to_tsc_test(bool use_clockid, s32 clockid)
 {
 	struct record_opts opts = {
 		.mmap_pages	     = UINT_MAX,
@@ -104,6 +97,8 @@ static int test__perf_time_to_tsc(struct test_suite *test __maybe_unused, int su
 	evsel->core.attr.comm = 1;
 	evsel->core.attr.disabled = 1;
 	evsel->core.attr.enable_on_exec = 0;
+	evsel->core.attr.use_clockid = use_clockid;
+	evsel->core.attr.clockid = clockid;
 
 	/*
 	 * For hybrid "cycles:u", it creates two events.
@@ -200,4 +195,32 @@ static int test__perf_time_to_tsc(struct test_suite *test __maybe_unused, int su
 	return err;
 }
 
+/**
+ * test__perf_time_to_tsc - test converting perf time to TSC.
+ *
+ * This function implements a test that checks that the conversion of perf time
+ * to and from TSC is consistent with the order of events.  If the test passes
+ * %0 is returned, otherwise %-1 is returned.  If TSC conversion is not
+ * supported then the test passes but " (not supported)" is printed.
+ */
+static int test__perf_time_to_tsc(struct test_suite *test __maybe_unused,
+				  int subtest __maybe_unused)
+{
+	int err;
+
+	err = perf_time_to_tsc_test(false, 0);
+
+	if (!err && perf_can_perf_clock_hw_clock()) {
+		pr_debug("Testing CLOCK_PERF_HW_CLOCK\n");
+		err = perf_time_to_tsc_test(true, CLOCK_PERF_HW_CLOCK);
+	}
+
+	if (!err && perf_can_perf_clock_hw_clock_ns()) {
+		pr_debug("Testing CLOCK_PERF_HW_CLOCK_NS\n");
+		err = perf_time_to_tsc_test(true, CLOCK_PERF_HW_CLOCK_NS);
+	}
+
+	return err;
+}
+
 DEFINE_SUITE("Convert perf time to TSC", perf_time_to_tsc);
-- 
2.25.1