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authorKan Liang2020-02-24 13:59:24 -0800
committerArnaldo Carvalho de Melo2020-03-10 14:56:46 -0300
commitb95fcd2c1c25bd14f55d5d6ab268b3ab00b8a774 (patch)
tree7fc0f5e60193d252b91c5757d66c3ff7b00262ae /tools/perf
parentab483d8bc8acb83f0103bc38ef8f2c27d98ffd1b (diff)
perf vendor events intel: Add NO_NMI_WATCHDOG metric constraint
Add NO_NMI_WATCHDOG metric constraint to Page_Walks_Utilization for Sky Lake and Cascade Lake. Committer testing: On a Lenovo T480S, Intel(R) Core(TM) i7-8650U Kaby Lake, that looking at x86's mapfile.csv file is a: $ grep -w skylake tools/perf/pmu-events/arch/x86/mapfile.csv GenuineIntel-6-[4589]E,v24,skylake,core $ So uses the constraint added in this patch in this file: tools/perf/pmu-events/arch/x86/skylake/skl-metrics.json Before: # perf stat -a -M Page_Walks_Utilization sleep 2 Performance counter stats for 'system wide': <not counted> itlb_misses.walk_pending (0.00%) <not counted> dtlb_load_misses.walk_pending (0.00%) <not counted> dtlb_store_misses.walk_pending (0.00%) <not counted> ept.walk_pending (0.00%) <not counted> cycles (0.00%) 2.001750514 seconds time elapsed Some events weren't counted. Try disabling the NMI watchdog: echo 0 > /proc/sys/kernel/nmi_watchdog perf stat ... echo 1 > /proc/sys/kernel/nmi_watchdog The events in group usually have to be from the same PMU. Try reorganizing the group. # After: # perf stat -a -M Page_Walks_Utilization sleep 2 Splitting metric group Page_Walks_Utilization into standalone metrics. Try disabling the NMI watchdog to comply NO_NMI_WATCHDOG metric constraint: echo 0 > /proc/sys/kernel/nmi_watchdog perf stat ... echo 1 > /proc/sys/kernel/nmi_watchdog , Performance counter stats for 'system wide': 36,883,102 itlb_misses.walk_pending # 0.1 Page_Walks_Utilization (79.99%) 123,104,146 dtlb_load_misses.walk_pending (80.02%) 13,720,795 dtlb_store_misses.walk_pending (79.99%) 0 ept.walk_pending (79.99%) 1,519,948,400 cycles (80.01%) 2.002170780 seconds time elapsed # Before and after, if we disable the nmi_watchdog we get: # echo 0 > /proc/sys/kernel/nmi_watchdog # perf stat -a -M Page_Walks_Utilization sleep 2 Performance counter stats for 'system wide': 33,721,658 itlb_misses.walk_pending # 0.1 Page_Walks_Utilization 84,070,996 dtlb_load_misses.walk_pending 9,816,071 dtlb_store_misses.walk_pending 0 ept.walk_pending 704,920,899 cycles 2.002331670 seconds time elapsed # More information about the metric expressions: # perf stat -v -a -M Page_Walks_Utilization sleep 2 Using CPUID GenuineIntel-6-8E-A metric expr ( itlb_misses.walk_pending + dtlb_load_misses.walk_pending + dtlb_store_misses.walk_pending + ept.walk_pending ) / ( 2 * cycles ) for Page_Walks_Utilization found event itlb_misses.walk_pending found event dtlb_load_misses.walk_pending found event dtlb_store_misses.walk_pending found event ept.walk_pending found event cycles adding {itlb_misses.walk_pending,dtlb_load_misses.walk_pending,dtlb_store_misses.walk_pending,ept.walk_pending,cycles}:W -> cpu/umask=0x10,(null)=0x186a3,event=0x85/ -> cpu/umask=0x10,(null)=0x1e8483,event=0x8/ -> cpu/umask=0x10,(null)=0x1e8483,event=0x49/ -> cpu/umask=0x10,(null)=0x1e8483,event=0x4f/ itlb_misses.walk_pending: 8085772 16010162799 16010162799 dtlb_load_misses.walk_pending: 28134579 16010162799 16010162799 dtlb_store_misses.walk_pending: 7276535 16010162799 16010162799 ept.walk_pending: 2 16010162799 16010162799 cycles: 315140605 16010162799 16010162799 Performance counter stats for 'system wide': 8,085,772 itlb_misses.walk_pending # 0.1 Page_Walks_Utilization 28,134,579 dtlb_load_misses.walk_pending 7,276,535 dtlb_store_misses.walk_pending 2 ept.walk_pending 315,140,605 cycles 2.002333181 seconds time elapsed # Signed-off-by: Kan Liang <kan.liang@linux.intel.com> Acked-by: Jiri Olsa <jolsa@redhat.com> Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Andi Kleen <ak@linux.intel.com> Cc: Jin Yao <yao.jin@linux.intel.com> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Ravi Bangoria <ravi.bangoria@linux.ibm.com> Link: http://lore.kernel.org/lkml/1582581564-184429-6-git-send-email-kan.liang@linux.intel.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf')
-rw-r--r--tools/perf/pmu-events/arch/x86/cascadelakex/clx-metrics.json3
-rw-r--r--tools/perf/pmu-events/arch/x86/skylake/skl-metrics.json3
-rw-r--r--tools/perf/pmu-events/arch/x86/skylakex/skx-metrics.json3
3 files changed, 6 insertions, 3 deletions
diff --git a/tools/perf/pmu-events/arch/x86/cascadelakex/clx-metrics.json b/tools/perf/pmu-events/arch/x86/cascadelakex/clx-metrics.json
index f94653229dd4..a728c6e5119b 100644
--- a/tools/perf/pmu-events/arch/x86/cascadelakex/clx-metrics.json
+++ b/tools/perf/pmu-events/arch/x86/cascadelakex/clx-metrics.json
@@ -215,7 +215,8 @@
"BriefDescription": "Utilization of the core's Page Walker(s) serving STLB misses triggered by instruction/Load/Store accesses",
"MetricExpr": "( ITLB_MISSES.WALK_PENDING + DTLB_LOAD_MISSES.WALK_PENDING + DTLB_STORE_MISSES.WALK_PENDING + EPT.WALK_PENDING ) / ( 2 * cycles )",
"MetricGroup": "TLB",
- "MetricName": "Page_Walks_Utilization"
+ "MetricName": "Page_Walks_Utilization",
+ "MetricConstraint": "NO_NMI_WATCHDOG"
},
{
"BriefDescription": "Utilization of the core's Page Walker(s) serving STLB misses triggered by instruction/Load/Store accesses",
diff --git a/tools/perf/pmu-events/arch/x86/skylake/skl-metrics.json b/tools/perf/pmu-events/arch/x86/skylake/skl-metrics.json
index e7feb60f9fa9..f97e8316ad2f 100644
--- a/tools/perf/pmu-events/arch/x86/skylake/skl-metrics.json
+++ b/tools/perf/pmu-events/arch/x86/skylake/skl-metrics.json
@@ -215,7 +215,8 @@
"BriefDescription": "Utilization of the core's Page Walker(s) serving STLB misses triggered by instruction/Load/Store accesses",
"MetricExpr": "( ITLB_MISSES.WALK_PENDING + DTLB_LOAD_MISSES.WALK_PENDING + DTLB_STORE_MISSES.WALK_PENDING + EPT.WALK_PENDING ) / ( 2 * cycles )",
"MetricGroup": "TLB",
- "MetricName": "Page_Walks_Utilization"
+ "MetricName": "Page_Walks_Utilization",
+ "MetricConstraint": "NO_NMI_WATCHDOG"
},
{
"BriefDescription": "Utilization of the core's Page Walker(s) serving STLB misses triggered by instruction/Load/Store accesses",
diff --git a/tools/perf/pmu-events/arch/x86/skylakex/skx-metrics.json b/tools/perf/pmu-events/arch/x86/skylakex/skx-metrics.json
index 21d7a0c2c2e8..35f5db1786f7 100644
--- a/tools/perf/pmu-events/arch/x86/skylakex/skx-metrics.json
+++ b/tools/perf/pmu-events/arch/x86/skylakex/skx-metrics.json
@@ -215,7 +215,8 @@
"BriefDescription": "Utilization of the core's Page Walker(s) serving STLB misses triggered by instruction/Load/Store accesses",
"MetricExpr": "( ITLB_MISSES.WALK_PENDING + DTLB_LOAD_MISSES.WALK_PENDING + DTLB_STORE_MISSES.WALK_PENDING + EPT.WALK_PENDING ) / ( 2 * cycles )",
"MetricGroup": "TLB",
- "MetricName": "Page_Walks_Utilization"
+ "MetricName": "Page_Walks_Utilization",
+ "MetricConstraint": "NO_NMI_WATCHDOG"
},
{
"BriefDescription": "Utilization of the core's Page Walker(s) serving STLB misses triggered by instruction/Load/Store accesses",