From: John Garry <john.garry@huawei.com>
To: <acme@kernel.org>, <peterz@infradead.org>, <mingo@redhat.com>,
<mark.rutland@arm.com>, <alexander.shishkin@linux.intel.com>,
<jolsa@redhat.com>, <namhyung@kernel.org>, <will@kernel.org>,
<mathieu.poirier@linaro.org>, <leo.yan@linaro.org>,
<irogers@google.com>
Cc: <qiangqing.zhang@nxp.com>, <kjain@linux.ibm.com>,
<linux-kernel@vger.kernel.org>, <zhangshaokun@hisilicon.com>,
<linux-arm-kernel@lists.infradead.org>, <linuxarm@huawei.com>,
<kan.liang@linux.intel.com>, <kim.phillips@amd.com>,
<ak@linux.intel.com>, John Garry <john.garry@huawei.com>
Subject: [PATCH v6 06/10] perf metricgroup: Fix metrics using aliases covering multiple PMUs
Date: Fri, 4 Dec 2020 19:10:12 +0800 [thread overview]
Message-ID: <1607080216-36968-7-git-send-email-john.garry@huawei.com> (raw)
In-Reply-To: <1607080216-36968-1-git-send-email-john.garry@huawei.com>
Support for metric expressions using aliases which cover multiple PMUs is
broken. Consider the following test metric expression:
"MetricExpr": "UNC_CBO_XSNP_RESPONSE.MISS_XCORE * UNC_CBO_XSNP_RESPONSE.MISS_EVICTION"
When used on my broadwell, "perf stat" gives:
unc_cbo_xsnp_response.miss_eviction -> uncore_cbox_1/umask=0x81,event=0x22/
unc_cbo_xsnp_response.miss_eviction -> uncore_cbox_0/umask=0x81,event=0x22/
unc_cbo_xsnp_response.miss_xcore -> uncore_cbox_1/umask=0x41,event=0x22/
unc_cbo_xsnp_response.miss_xcore -> uncore_cbox_0/umask=0x41,event=0x22/
Control descriptor is not initialized
unc_cbo_xsnp_response.miss_eviction: 3645925 1000850523 1000850523
unc_cbo_xsnp_response.miss_xcore: 106850 1000850523 1000850523
Performance counter stats for 'system wide':
3,645,925 unc_cbo_xsnp_response.miss_eviction # 389567086250.00 test_metric_inc
106,850 unc_cbo_xsnp_response.miss_xcore
1.000883096 seconds time elapsed
Notice that only the results from one PMU are included. Fix the logic of
find_evsel_group() to enable events which apply to multiple PMUs, by
checking if the event pmu_name matches that of the metric event.
With that, "perf stat" now gives:
unc_cbo_xsnp_response.miss_eviction -> uncore_cbox_1/umask=0x81,event=0x22/
unc_cbo_xsnp_response.miss_eviction -> uncore_cbox_0/umask=0x81,event=0x22/
unc_cbo_xsnp_response.miss_xcore -> uncore_cbox_1/umask=0x41,event=0x22/
unc_cbo_xsnp_response.miss_xcore -> uncore_cbox_0/umask=0x41,event=0x22/
Control descriptor is not initialized
unc_cbo_xsnp_response.miss_eviction: 4237983 1000904100 1000904100
unc_cbo_xsnp_response.miss_xcore: 218643 1000904100 1000904100
unc_cbo_xsnp_response.miss_eviction: 4254148 1000902629 1000902629
unc_cbo_xsnp_response.miss_xcore: 213352 1000902629 1000902629
Performance counter stats for 'system wide':
4,237,983 unc_cbo_xsnp_response.miss_eviction # 3668558131345.00 test_metric_inc
218,643 unc_cbo_xsnp_response.miss_xcore
4,254,148 unc_cbo_xsnp_response.miss_eviction
213,352 unc_cbo_xsnp_response.miss_xcore
1.000938151 seconds time elapsed
Signed-off-by: John Garry <john.garry@huawei.com>
Acked-by: Kajol Jain <kjain@linux.ibm.com>
---
tools/perf/util/metricgroup.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/tools/perf/util/metricgroup.c b/tools/perf/util/metricgroup.c
index 81d201c8b833..b89160718c04 100644
--- a/tools/perf/util/metricgroup.c
+++ b/tools/perf/util/metricgroup.c
@@ -279,7 +279,9 @@ static struct evsel *find_evsel_group(struct evlist *perf_evlist,
* when then group is left.
*/
if (!has_constraint &&
- ev->leader != metric_events[i]->leader)
+ ev->leader != metric_events[i]->leader &&
+ !strcmp(ev->leader->pmu_name,
+ metric_events[i]->leader->pmu_name))
break;
if (!strcmp(metric_events[i]->name, ev->name)) {
set_bit(ev->idx, evlist_used);
--
2.26.2
next prev parent reply other threads:[~2020-12-04 11:16 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-12-04 11:10 [PATCH v6 00/10] perf pmu-events: Support event aliasing for system PMUs John Garry
2020-12-04 11:10 ` [PATCH v6 01/10] perf jevents: Add support for an extra directory level John Garry
2020-12-04 11:10 ` [PATCH v6 02/10] perf jevents: Add support for system events tables John Garry
2020-12-04 11:10 ` [PATCH v6 03/10] perf pmu: Add pmu_id() John Garry
2020-12-04 11:10 ` [PATCH v6 04/10] perf pmu: Add pmu_add_sys_aliases() John Garry
2020-12-04 11:10 ` [PATCH v6 05/10] perf evlist: Change perf_evlist__splice_list_tail() ordering John Garry
2020-12-04 11:10 ` John Garry [this message]
2020-12-07 17:19 ` [PATCH v6 06/10] perf metricgroup: Fix metrics using aliases covering multiple PMUs Arnaldo Carvalho de Melo
2020-12-07 18:02 ` John Garry
2020-12-04 11:10 ` [PATCH v6 07/10] perf metricgroup: Split up metricgroup__print() John Garry
2020-12-04 11:10 ` [PATCH v6 08/10] perf metricgroup: Support printing metric groups for system PMUs John Garry
2020-12-07 17:23 ` Arnaldo Carvalho de Melo
2020-12-07 18:04 ` John Garry
2020-12-04 11:10 ` [PATCH v6 09/10] perf metricgroup: Support adding metrics " John Garry
2020-12-04 11:10 ` [PATCH v6 10/10] perf vendor events: Add JSON metrics for imx8mm DDR Perf John Garry
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