github-mirror/linux
1
0
Fork 0
mirror of https://github.com/torvalds/linux.git synced 2026-09-22 04:34:03 +02:00
Code Issues Actions Packages Projects Releases Wiki Activity Graph

perf jevents: Add context switch metrics for Intel

Browse Source 
Metrics break down context switches for different kinds of
instruction.

Signed-off-by: Ian Rogers <irogers@google.com>
Tested-by: Thomas Falcon <thomas.falcon@intel.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Benjamin Gray <bgray@linux.ibm.com>
Cc: Caleb Biggers <caleb.biggers@intel.com>
Cc: Edward Baker <edward.baker@intel.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: James Clark <james.clark@linaro.org>
Cc: Jing Zhang <renyu.zj@linux.alibaba.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: John Garry <john.g.garry@oracle.com>
Cc: Leo Yan <leo.yan@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Perry Taylor <perry.taylor@intel.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Sandipan Das <sandipan.das@amd.com>
Cc: Weilin Wang <weilin.wang@intel.com>
Cc: Xu Yang <xu.yang_2@nxp.com>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Ian Rogers 2026-01-27 10:44:55 -08:00 committed by Arnaldo Carvalho de Melo
parent 59341f4e17
commit 2f3d6ea05d
1 changed files with 58 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

58
tools/perf/pmu-events/intel_metrics.py
View File

@ -263,6 +263,63 @@ def IntelBr():
description="breakdown of retired branch instructions")
def IntelCtxSw() -> MetricGroup:
cs = Event("context\\-switches")
metrics = [
Metric("lpm_cs_rate", "Context switches per second",
d_ratio(cs, interval_sec), "ctxsw/s")
]
ev = Event("instructions")
metrics.append(Metric("lpm_cs_instr", "Instructions per context switch",
d_ratio(ev, cs), "instr/cs"))
ev = Event("cycles")
metrics.append(Metric("lpm_cs_cycles", "Cycles per context switch",
d_ratio(ev, cs), "cycles/cs"))
try:
ev = Event("MEM_INST_RETIRED.ALL_LOADS", "MEM_UOPS_RETIRED.ALL_LOADS")
metrics.append(Metric("lpm_cs_loads", "Loads per context switch",
d_ratio(ev, cs), "loads/cs"))
except:
pass
try:
ev = Event("MEM_INST_RETIRED.ALL_STORES",
"MEM_UOPS_RETIRED.ALL_STORES")
metrics.append(Metric("lpm_cs_stores", "Stores per context switch",
d_ratio(ev, cs), "stores/cs"))
except:
pass
try:
ev = Event("BR_INST_RETIRED.NEAR_TAKEN", "BR_INST_RETIRED.TAKEN_JCC")
metrics.append(Metric("lpm_cs_br_taken", "Branches taken per context switch",
d_ratio(ev, cs), "br_taken/cs"))
except:
pass
try:
l2_misses = (Event("L2_RQSTS.DEMAND_DATA_RD_MISS") +
Event("L2_RQSTS.RFO_MISS") +
Event("L2_RQSTS.CODE_RD_MISS"))
try:
l2_misses += Event("L2_RQSTS.HWPF_MISS",
"L2_RQSTS.L2_PF_MISS", "L2_RQSTS.PF_MISS")
except:
pass
metrics.append(Metric("lpm_cs_l2_misses", "L2 misses per context switch",
d_ratio(l2_misses, cs), "l2_misses/cs"))
except:
pass
return MetricGroup("lpm_cs", metrics,
description=("Number of context switches per second, instructions "
"retired & core cycles between context switches"))
def IntelIlp() -> MetricGroup:
tsc = Event("msr/tsc/")
c0 = Event("msr/mperf/")
@ -678,6 +735,7 @@ def main() -> None:
Smi(),
Tsx(),
IntelBr(),
IntelCtxSw(),
IntelIlp(),
IntelL2(),
IntelLdSt(),