From: Weilin Wang <weilin.wang@intel.com>
With this command line option, tpebs recording is turned off in perf stat on
default. It will only be turned on when this option is given in perf stat
command.
Exampe with --enable-tpebs-recording:
perf stat -M tma_dtlb_store -a --enable-tpebs-recording sleep 1
[ perf record: Woken up 1 times to write data ]
[ perf record: Captured and wrote 0.000 MB - ]
Performance counter stats for 'system wide':
181,047,168 cpu_core/TOPDOWN.SLOTS/ # 0.6 % tma_dtlb_store
3,195,608 cpu_core/topdown-retiring/
40,156,649 cpu_core/topdown-mem-bound/
3,550,925 cpu_core/topdown-bad-spec/
117,571,818 cpu_core/topdown-fe-bound/
57,118,087 cpu_core/topdown-be-bound/
69,179 cpu_core/EXE_ACTIVITY.BOUND_ON_STORES/
4,582 cpu_core/MEM_INST_RETIRED.STLB_HIT_STORES/
30,183,104 cpu_core/CPU_CLK_UNHALTED.DISTRIBUTED/
30,556,790 cpu_core/CPU_CLK_UNHALTED.THREAD/
168,486 cpu_core/DTLB_STORE_MISSES.WALK_ACTIVE/
0 MEM_INST_RETIRED.STLB_HIT_STORES:R
1.003105924 seconds time elapsed
Exampe without --enable-tpebs-recording:
perf stat -M tma_dtlb_store -a sleep 1
Performance counter stats for 'system wide':
181,047,168 cpu_core/TOPDOWN.SLOTS/ # 0.6 % tma_dtlb_store
3,195,608 cpu_core/topdown-retiring/
40,156,649 cpu_core/topdown-mem-bound/
3,550,925 cpu_core/topdown-bad-spec/
117,571,818 cpu_core/topdown-fe-bound/
57,118,087 cpu_core/topdown-be-bound/
69,179 cpu_core/EXE_ACTIVITY.BOUND_ON_STORES/
4,582 cpu_core/MEM_INST_RETIRED.STLB_HIT_STORES/
30,183,104 cpu_core/CPU_CLK_UNHALTED.DISTRIBUTED/
30,556,790 cpu_core/CPU_CLK_UNHALTED.THREAD/
168,486 cpu_core/DTLB_STORE_MISSES.WALK_ACTIVE/
0 MEM_INST_RETIRED.STLB_HIT_STORES:R
1.003105924 seconds time elapsed
Signed-off-by: Weilin Wang <weilin.wang@intel.com>
---
tools/perf/builtin-stat.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/tools/perf/builtin-stat.c b/tools/perf/builtin-stat.c
index b09cb2c6e9c2..4530e4caa417 100644
--- a/tools/perf/builtin-stat.c
+++ b/tools/perf/builtin-stat.c
@@ -1237,6 +1237,8 @@ static struct option stat_options[] = {
"disable adding events for the metric threshold calculation"),
OPT_BOOLEAN(0, "topdown", &topdown_run,
"measure top-down statistics"),
+ OPT_BOOLEAN(0, "enable-tpebs-recording", &tpebs_recording,
+ "enable recording for tpebs when retire_latency required"),
OPT_UINTEGER(0, "td-level", &stat_config.topdown_level,
"Set the metrics level for the top-down statistics (0: max level)"),
OPT_BOOLEAN(0, "smi-cost", &smi_cost,
--
2.43.0