Messages in this thread Patch in this message | | | Date | Wed, 13 Mar 2024 22:59:11 -0700 | Subject | [PATCH v3 12/20] perf jevents: Add context switch metrics for Intel | From | Ian Rogers <> |
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Metrics break down context switches for different kinds of instruction.
Signed-off-by: Ian Rogers <irogers@google.com> --- tools/perf/pmu-events/intel_metrics.py | 55 ++++++++++++++++++++++++++ 1 file changed, 55 insertions(+)
diff --git a/tools/perf/pmu-events/intel_metrics.py b/tools/perf/pmu-events/intel_metrics.py index d15f9ac05204..387981d58320 100755 --- a/tools/perf/pmu-events/intel_metrics.py +++ b/tools/perf/pmu-events/intel_metrics.py @@ -266,6 +266,60 @@ def IntelBr(): description="breakdown of retired branch instructions") +def IntelCtxSw() -> MetricGroup: + cs = Event("context\-switches") + metrics = [ + Metric("cs_rate", "Context switches per second", d_ratio(cs, interval_sec), "ctxsw/s") + ] + + ev = Event("instructions") + metrics.append(Metric("cs_instr", "Instructions per context switch", + d_ratio(ev, cs), "instr/cs")) + + ev = Event("cycles") + metrics.append(Metric("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("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("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("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("cs_l2_misses", "L2 misses per context switch", + d_ratio(l2_misses, cs), "l2_misses/cs")) + except: + pass + + return MetricGroup("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/") @@ -648,6 +702,7 @@ def main() -> None: Smi(), Tsx(), IntelBr(), + IntelCtxSw(), IntelIlp(), IntelL2(), IntelLdSt(), -- 2.44.0.278.ge034bb2e1d-goog
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