linux-kernel - Re: [PATCH 13/19] perf metric: Add cache_miss

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Date:   Sun, 26 Jul 2020 14:49:35 +0530
From:   kajoljain <kjain@...ux.ibm.com>
To:     Jiri Olsa <jolsa@...nel.org>,
        Arnaldo Carvalho de Melo <acme@...nel.org>
Cc:     Ian Rogers <irogers@...gle.com>,
        lkml <linux-kernel@...r.kernel.org>,
        Ingo Molnar <mingo@...nel.org>,
        Namhyung Kim <namhyung@...nel.org>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Peter Zijlstra <a.p.zijlstra@...llo.nl>,
        Michael Petlan <mpetlan@...hat.com>,
        Andi Kleen <ak@...ux.intel.com>,
        John Garry <john.garry@...wei.com>,
        "Paul A. Clarke" <pc@...ibm.com>,
        Stephane Eranian <eranian@...gle.com>
Subject: Re: [PATCH 13/19] perf metric: Add cache_miss_cycles to metric parse
 test



On 7/19/20 11:43 PM, Jiri Olsa wrote:
> Adding test that compute metric with other metrics in it.
> 
>   cache_miss_cycles = metric:dcache_miss_cpi + metric:icache_miss_cycles
> 
> Acked-by: Ian Rogers <irogers@...gle.com>
> Signed-off-by: Jiri Olsa <jolsa@...nel.org>

Reviewed-By : Kajol Jain<kjain@...ux.ibm.com>

Thanks,
Kajol Jain
> ---
>  tools/perf/tests/parse-metric.c | 33 +++++++++++++++++++++++++++++++++
>  1 file changed, 33 insertions(+)
> 
> diff --git a/tools/perf/tests/parse-metric.c b/tools/perf/tests/parse-metric.c
> index 8c48251425e1..28f33893338b 100644
> --- a/tools/perf/tests/parse-metric.c
> +++ b/tools/perf/tests/parse-metric.c
> @@ -11,6 +11,8 @@
>  #include "debug.h"
>  #include "expr.h"
>  #include "stat.h"
> +#include <perf/cpumap.h>
> +#include <perf/evlist.h>
>  
>  static struct pmu_event pme_test[] = {
>  {
> @@ -22,6 +24,18 @@ static struct pmu_event pme_test[] = {
>  			  "( 1 + cpu_clk_unhalted.one_thread_active / cpu_clk_unhalted.ref_xclk ) )))",
>  	.metric_name	= "Frontend_Bound_SMT",
>  },
> +{
> +	.metric_expr	= "l1d\\-loads\\-misses / inst_retired.any",
> +	.metric_name	= "dcache_miss_cpi",
> +},
> +{
> +	.metric_expr	= "l1i\\-loads\\-misses / inst_retired.any",
> +	.metric_name	= "icache_miss_cycles",
> +},
> +{
> +	.metric_expr	= "(dcache_miss_cpi + icache_miss_cycles)",
> +	.metric_name	= "cache_miss_cycles",
> +},
>  };
>  
>  static struct pmu_events_map map = {
> @@ -162,9 +176,28 @@ static int test_frontend(void)
>  	return 0;
>  }
>  
> +static int test_cache_miss_cycles(void)
> +{
> +	double ratio;
> +	struct value vals[] = {
> +		{ .event = "l1d-loads-misses",  .val = 300 },
> +		{ .event = "l1i-loads-misses",  .val = 200 },
> +		{ .event = "inst_retired.any",  .val = 400 },
> +		{ 0 },
> +	};
> +
> +	TEST_ASSERT_VAL("failed to compute metric",
> +			compute_metric("cache_miss_cycles", vals, &ratio) == 0);
> +
> +	TEST_ASSERT_VAL("cache_miss_cycles failed, wrong ratio",
> +			ratio == 1.25);
> +	return 0;
> +}
> +
>  int test__parse_metric(struct test *test __maybe_unused, int subtest __maybe_unused)
>  {
>  	TEST_ASSERT_VAL("IPC failed", test_ipc() == 0);
>  	TEST_ASSERT_VAL("frontend failed", test_frontend() == 0);
> +	TEST_ASSERT_VAL("cache_miss_cycles failed", test_cache_miss_cycles() == 0);
>  	return 0;
>  }
>