Re: [PATCH 14/19] perf metric: Add DCache_L2 to metric parse test

From: Arnaldo Carvalho de Melo <acme@kernel.org>
To: kajoljain <kjain@linux.ibm.com>
Cc: Jiri Olsa <jolsa@kernel.org>, Ian Rogers <irogers@google.com>,
	lkml <linux-kernel@vger.kernel.org>,
	Ingo Molnar <mingo@kernel.org>,
	Namhyung Kim <namhyung@kernel.org>,
	Alexander Shishkin <alexander.shishkin@linux.intel.com>,
	Peter Zijlstra <a.p.zijlstra@chello.nl>,
	Michael Petlan <mpetlan@redhat.com>,
	Andi Kleen <ak@linux.intel.com>,
	John Garry <john.garry@huawei.com>,
	"Paul A. Clarke" <pc@us.ibm.com>,
	Stephane Eranian <eranian@google.com>
Subject: Re: [PATCH 14/19] perf metric: Add DCache_L2 to metric parse test
Date: Tue, 28 Jul 2020 09:34:36 -0300	[thread overview]
Message-ID: <20200728123436.GU40195@kernel.org> (raw)
In-Reply-To: <7addd402-9d59-674e-8d02-0e330cb5665f@linux.ibm.com>

Em Sun, Jul 26, 2020 at 02:49:46PM +0530, kajoljain escreveu:
> On 7/19/20 11:43 PM, Jiri Olsa wrote:
> > Adding test that compute DCache_L2 metrics with other related metrics in it.
> > 
> > Acked-by: Ian Rogers <irogers@google.com>
> > Signed-off-by: Jiri Olsa <jolsa@kernel.org>
> 
> Reviewed-By : Kajol Jain<kjain@linux.ibm.com>

Thanks, applied.

- Arnaldo

> Thanks,
> Kajol Jain
> > ---
> >  tools/perf/tests/parse-metric.c | 71 +++++++++++++++++++++++++++++++++
> >  1 file changed, 71 insertions(+)
> > 
> > diff --git a/tools/perf/tests/parse-metric.c b/tools/perf/tests/parse-metric.c
> > index 28f33893338b..aa4d5a9f09a8 100644
> > --- a/tools/perf/tests/parse-metric.c
> > +++ b/tools/perf/tests/parse-metric.c
> > @@ -36,6 +36,27 @@ static struct pmu_event pme_test[] = {
> >  	.metric_expr	= "(dcache_miss_cpi + icache_miss_cycles)",
> >  	.metric_name	= "cache_miss_cycles",
> >  },
> > +{
> > +	.metric_expr	= "l2_rqsts.demand_data_rd_hit + l2_rqsts.pf_hit + l2_rqsts.rfo_hit",
> > +	.metric_name	= "DCache_L2_All_Hits",
> > +},
> > +{
> > +	.metric_expr	= "max(l2_rqsts.all_demand_data_rd - l2_rqsts.demand_data_rd_hit, 0) + "
> > +			  "l2_rqsts.pf_miss + l2_rqsts.rfo_miss",
> > +	.metric_name	= "DCache_L2_All_Miss",
> > +},
> > +{
> > +	.metric_expr	= "dcache_l2_all_hits + dcache_l2_all_miss",
> > +	.metric_name	= "DCache_L2_All",
> > +},
> > +{
> > +	.metric_expr	= "d_ratio(dcache_l2_all_hits, dcache_l2_all)",
> > +	.metric_name	= "DCache_L2_Hits",
> > +},
> > +{
> > +	.metric_expr	= "d_ratio(dcache_l2_all_miss, dcache_l2_all)",
> > +	.metric_name	= "DCache_L2_Misses",
> > +},
> >  };
> >  
> >  static struct pmu_events_map map = {
> > @@ -194,10 +215,60 @@ static int test_cache_miss_cycles(void)
> >  	return 0;
> >  }
> >  
> > +
> > +/*
> > + * DCache_L2_All_Hits = l2_rqsts.demand_data_rd_hit + l2_rqsts.pf_hit + l2_rqsts.rfo_hi
> > + * DCache_L2_All_Miss = max(l2_rqsts.all_demand_data_rd - l2_rqsts.demand_data_rd_hit, 0) +
> > + *                      l2_rqsts.pf_miss + l2_rqsts.rfo_miss
> > + * DCache_L2_All      = dcache_l2_all_hits + dcache_l2_all_miss
> > + * DCache_L2_Hits     = d_ratio(dcache_l2_all_hits, dcache_l2_all)
> > + * DCache_L2_Misses   = d_ratio(dcache_l2_all_miss, dcache_l2_all)
> > + *
> > + * l2_rqsts.demand_data_rd_hit = 100
> > + * l2_rqsts.pf_hit             = 200
> > + * l2_rqsts.rfo_hi             = 300
> > + * l2_rqsts.all_demand_data_rd = 400
> > + * l2_rqsts.pf_miss            = 500
> > + * l2_rqsts.rfo_miss           = 600
> > + *
> > + * DCache_L2_All_Hits = 600
> > + * DCache_L2_All_Miss = MAX(400 - 100, 0) + 500 + 600 = 1400
> > + * DCache_L2_All      = 600 + 1400  = 2000
> > + * DCache_L2_Hits     = 600 / 2000  = 0.3
> > + * DCache_L2_Misses   = 1400 / 2000 = 0.7
> > + */
> > +static int test_dcache_l2(void)
> > +{
> > +	double ratio;
> > +	struct value vals[] = {
> > +		{ .event = "l2_rqsts.demand_data_rd_hit", .val = 100 },
> > +		{ .event = "l2_rqsts.pf_hit",             .val = 200 },
> > +		{ .event = "l2_rqsts.rfo_hit",            .val = 300 },
> > +		{ .event = "l2_rqsts.all_demand_data_rd", .val = 400 },
> > +		{ .event = "l2_rqsts.pf_miss",            .val = 500 },
> > +		{ .event = "l2_rqsts.rfo_miss",           .val = 600 },
> > +		{ 0 },
> > +	};
> > +
> > +	TEST_ASSERT_VAL("failed to compute metric",
> > +			compute_metric("DCache_L2_Hits", vals, &ratio) == 0);
> > +
> > +	TEST_ASSERT_VAL("DCache_L2_Hits failed, wrong ratio",
> > +			ratio == 0.3);
> > +
> > +	TEST_ASSERT_VAL("failed to compute metric",
> > +			compute_metric("DCache_L2_Misses", vals, &ratio) == 0);
> > +
> > +	TEST_ASSERT_VAL("DCache_L2_Misses failed, wrong ratio",
> > +			ratio == 0.7);
> > +	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);
> > +	TEST_ASSERT_VAL("DCache_L2 failed", test_dcache_l2() == 0);
> >  	return 0;
> >  }
> > 

-- 

- Arnaldo