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AJvYcCVBgh+mlMgyOmMPZt9h29Vds3Ep/sHXtxeDPqVXhI7TPi8jDOnxt8E5yln4IRz11aQBAkg868TyH8naBr8xgWdKFChmX6/vxiG9qwWj X-Gm-Message-State: AOJu0Yx0kACT8zrVA4mZWICpAjsDPXWqqymJRre3aKj/CLIg7UjD5Ent ytWRa+tYnSdnVrVxjMydinANbt/d777ongrxInMGaoyBOG/2DoifeAEG9hf1EgoEma2vxbNu6OW pEuHleA== X-Received: from irogers.svl.corp.google.com ([2620:15c:2a3:200:af4b:7fc1:b7be:fcb7]) (user=irogers job=sendgmr) by 2002:a05:6902:120a:b0:dc6:f877:ea7b with SMTP id s10-20020a056902120a00b00dc6f877ea7bmr540903ybu.9.1709319402300; Fri, 01 Mar 2024 10:56:42 -0800 (PST) Date: Fri, 1 Mar 2024 10:55:51 -0800 In-Reply-To: <20240301185559.2661241-1-irogers@google.com> Message-Id: <20240301185559.2661241-13-irogers@google.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <20240301185559.2661241-1-irogers@google.com> X-Mailer: git-send-email 2.44.0.278.ge034bb2e1d-goog Subject: [PATCH v2 12/20] perf jevents: Add context switch metrics for Intel From: Ian Rogers To: Perry Taylor , Samantha Alt , Caleb Biggers , Weilin Wang , Edward Baker , Peter Zijlstra , Ingo Molnar , Arnaldo Carvalho de Melo , Namhyung Kim , Mark Rutland , Alexander Shishkin , Jiri Olsa , Ian Rogers , Adrian Hunter , James Clark , John Garry , linux-perf-users@vger.kernel.org, linux-kernel@vger.kernel.org, Stephane Eranian X-getmail-retrieved-from-mailbox: INBOX X-GMAIL-THRID: 1792351517280356620 X-GMAIL-MSGID: 1792351517280356620 Metrics break down context switches for different kinds of instruction. Signed-off-by: Ian Rogers --- 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 6f6d1cdf6649..49e51c33c0f7 100755 --- a/tools/perf/pmu-events/intel_metrics.py +++ b/tools/perf/pmu-events/intel_metrics.py @@ -272,6 +272,60 @@ 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/") @@ -633,6 +687,7 @@ all_metrics = MetricGroup("", [ Smi(), Tsx(), IntelBr(), + IntelCtxSw(), IntelIlp(), IntelL2(), IntelLdSt(),