From nobody Thu Sep 18 04:02:51 2025 Received: from mail-pl1-f201.google.com (mail-pl1-f201.google.com [209.85.214.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id D605523C4F3 for ; Fri, 29 Aug 2025 04:11:42 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.214.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1756440704; cv=none; b=Tvi7WscB00CuWOzpDp4XuO1e3qpHjUwmVJepj4X/gvMgrX3LS1j1SWEE3LzKU33laMdQQ9MwTj/C0MzS590zT5Nhs1g0mEGQygE25j1YZmLZArFoq9KRBRbBxO7d2XUzjGuX+FmpyJqsgc7mLdlfN+oPnr/kIG/qaQdDS73THrs= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1756440704; c=relaxed/simple; bh=I5+OKq7qSksLoa9NxJiPDaTGBoDHLGP1QKRZKrM7N08=; h=Date:In-Reply-To:Mime-Version:References:Message-ID:Subject:From: To:Content-Type; b=OHWNCNjyIu2in4+lXKEnPxWUl9vsD1U6OxmSkNbTPoC/THvFTdf9y22y0erY1LJx0ge3M7glJVgGea7wAg1mRdEXTVJO2uCpnwG+VlQVABoQ5Bhfem/rHN1m4kgmcr4BQPcLDJLNjiLl54dvEu8fmVEMnFpAKuMgIaoHAankTmc= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com; spf=pass smtp.mailfrom=flex--irogers.bounces.google.com; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b=NasL4Fuv; arc=none smtp.client-ip=209.85.214.201 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=flex--irogers.bounces.google.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="NasL4Fuv" Received: by mail-pl1-f201.google.com with SMTP id d9443c01a7336-2487543a4f9so33715075ad.1 for ; Thu, 28 Aug 2025 21:11:42 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20230601; t=1756440702; x=1757045502; darn=vger.kernel.org; h=to:from:subject:message-id:references:mime-version:in-reply-to:date :from:to:cc:subject:date:message-id:reply-to; bh=fQzzxVRb28+WKh4KU7BgWk34NSL03IvXJbHJ+fplBFM=; b=NasL4Fuv4W2uibJBIHFxSEHZkCjhmdqnyMEw+veUvS4a/1GaNldE+5dMFLRmsXfmCr vOsScAMVt74LMc9tgAn4dUMIoYuVPHM16GEFD73eilwG2KP8APfq1llxbL8WbdQX+UB1 sqcijUea6mLgeq7zsH9DQQw36xLGugNm37sxURATA61l1DR9Uh2fOhtm9liSyH1e/z1Y Fxn0QVmvM86z6vT12soWOx/osVEyQgiZyfOal10jco58AtHVLIXexTnU+cMOtdt8h29M vz9CxcUgUc+TSmZcGkKA6LLaTC4UMmvSy4c+2ykdSzk44HcscHPDAQl/adjbf46oBFlh qdKQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1756440702; x=1757045502; h=to:from:subject:message-id:references:mime-version:in-reply-to:date :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=fQzzxVRb28+WKh4KU7BgWk34NSL03IvXJbHJ+fplBFM=; b=TapXByQQkqVDX/nQOdGSmKNzs0N+gqLcLgZydbcHPW/iavucNQnIVC7w3p0HK1PcMI 2AsuI+0pF/SCN4EBGFoJV99bzkmLtATMa1/X1aKo33RmdspbZfs0X8TFPPC09xHL/5On Xvv20xk9WL6QvFDWipSGxP3y9JB6t49nRbDdAbnQ7tI4/qbQkKw9KP+rMLZy8OfvoBkH 2qq1tFq3GVwFls/3IcvAav6T5tG74AXYRRm5fx56MOoGl0V/cyJyhSE/zfWcVAhmwjuT x0G6ZJr+sWn+9utGuFt7/YvMXAOBXY7SLZFq6dMsaKW7zUKUG4XevlbWf8nbiSwDfCtO WCXQ== X-Forwarded-Encrypted: i=1; AJvYcCWs3l1QC9clwrNMI4HLspFJZ7t6Iu3Jxx/DaRPrpo2xOfnK2LtUpzACNKT9rEhvtjZK7WAV7+xppZevqYo=@vger.kernel.org X-Gm-Message-State: AOJu0YzRmswoDtWelW3rrmTyeOxR2y2EhWxUZlr8wh9zUWhFMUWgmf7P KKUg4D5QNl1fPGtQdr5Z2eSPFcE3uYh5J548fYD2CExOccqBceu7lnVbgUM0EN4PBEWBvaR3Oo3 27Te/Ht9wZg== X-Google-Smtp-Source: AGHT+IGo665Ew+lDhjsYx4+ikVjCW3asVY4ETWxT3+Qseq7vels4sVkpbO2ooqh/IMHXavmdP8kgSA0KOmA1 X-Received: from plmd12.prod.google.com ([2002:a17:903:ecc:b0:248:c91f:34f3]) (user=irogers job=prod-delivery.src-stubby-dispatcher) by 2002:a17:902:e945:b0:246:b157:5e01 with SMTP id d9443c01a7336-246b157697dmr224023085ad.61.1756440702262; Thu, 28 Aug 2025 21:11:42 -0700 (PDT) Date: Thu, 28 Aug 2025 21:10:48 -0700 In-Reply-To: <20250829041104.4186320-1-irogers@google.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <20250829041104.4186320-1-irogers@google.com> X-Mailer: git-send-email 2.51.0.318.gd7df087d1a-goog Message-ID: <20250829041104.4186320-8-irogers@google.com> Subject: [PATCH v5 07/22] perf jevents: Add br metric group for branch statistics on Intel From: Ian Rogers To: Peter Zijlstra , Ingo Molnar , Arnaldo Carvalho de Melo , Namhyung Kim , Mark Rutland , Alexander Shishkin , Jiri Olsa , Ian Rogers , Adrian Hunter , Kan Liang , James Clark , Xu Yang , linux-kernel@vger.kernel.org, linux-perf-users@vger.kernel.org, John Garry , Jing Zhang , Sandipan Das , Benjamin Gray , Perry Taylor , Samantha Alt , Caleb Biggers , Weilin Wang , Edward Baker , Thomas Falcon Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" The br metric group for branches itself comprises metric groups for total, taken, conditional, fused and far metric groups using json events. Conditional taken and not taken metrics are specific to Icelake and later generations, so the presence of the event is used to determine whether the metric should exist. Signed-off-by: Ian Rogers --- tools/perf/pmu-events/intel_metrics.py | 138 +++++++++++++++++++++++++ 1 file changed, 138 insertions(+) diff --git a/tools/perf/pmu-events/intel_metrics.py b/tools/perf/pmu-events= /intel_metrics.py index a353e682df96..53b9606ef1a2 100755 --- a/tools/perf/pmu-events/intel_metrics.py +++ b/tools/perf/pmu-events/intel_metrics.py @@ -124,6 +124,143 @@ def Tsx() -> Optional[MetricGroup]: ], description=3D"Breakdown of transactional memory statistics") =20 =20 +def IntelBr(): + ins =3D Event("instructions") + + def Total() -> MetricGroup: + br_all =3D Event ("BR_INST_RETIRED.ALL_BRANCHES", "BR_INST_RETIRED.ANY= ") + br_m_all =3D Event("BR_MISP_RETIRED.ALL_BRANCHES", + "BR_INST_RETIRED.MISPRED", + "BR_MISP_EXEC.ANY") + br_clr =3D None + try: + br_clr =3D Event("BACLEARS.ANY", "BACLEARS.ALL") + except: + pass + + br_r =3D d_ratio(br_all, interval_sec) + ins_r =3D d_ratio(ins, br_all) + misp_r =3D d_ratio(br_m_all, br_all) + clr_r =3D d_ratio(br_clr, interval_sec) if br_clr else None + + return MetricGroup("lpm_br_total", [ + Metric("lpm_br_total_retired", + "The number of branch instructions retired per second.", br= _r, + "insn/s"), + Metric( + "lpm_br_total_mispred", + "The number of branch instructions retired, of any type, that = were " + "not correctly predicted as a percentage of all branch instruc= ions.", + misp_r, "100%"), + Metric("lpm_br_total_insn_between_branches", + "The number of instructions divided by the number of branch= es.", + ins_r, "insn"), + Metric("lpm_br_total_insn_fe_resteers", + "The number of resync branches per second.", clr_r, "req/s" + ) if clr_r else None + ]) + + def Taken() -> MetricGroup: + br_all =3D Event("BR_INST_RETIRED.ALL_BRANCHES", "BR_INST_RETIRED.ANY") + br_m_tk =3D None + try: + br_m_tk =3D Event("BR_MISP_RETIRED.NEAR_TAKEN", + "BR_MISP_RETIRED.TAKEN_JCC", + "BR_INST_RETIRED.MISPRED_TAKEN") + except: + pass + br_r =3D d_ratio(br_all, interval_sec) + ins_r =3D d_ratio(ins, br_all) + misp_r =3D d_ratio(br_m_tk, br_all) if br_m_tk else None + return MetricGroup("lpm_br_taken", [ + Metric("lpm_br_taken_retired", + "The number of taken branches that were retired per second.= ", + br_r, "insn/s"), + Metric( + "lpm_br_taken_mispred", + "The number of retired taken branch instructions that were " + "mispredicted as a percentage of all taken branches.", misp_r, + "100%") if misp_r else None, + Metric( + "lpm_br_taken_insn_between_branches", + "The number of instructions divided by the number of taken bra= nches.", + ins_r, "insn"), + ]) + + def Conditional() -> Optional[MetricGroup]: + try: + br_cond =3D Event("BR_INST_RETIRED.COND", + "BR_INST_RETIRED.CONDITIONAL", + "BR_INST_RETIRED.TAKEN_JCC") + br_m_cond =3D Event("BR_MISP_RETIRED.COND", + "BR_MISP_RETIRED.CONDITIONAL", + "BR_MISP_RETIRED.TAKEN_JCC") + except: + return None + + br_cond_nt =3D None + br_m_cond_nt =3D None + try: + br_cond_nt =3D Event("BR_INST_RETIRED.COND_NTAKEN") + br_m_cond_nt =3D Event("BR_MISP_RETIRED.COND_NTAKEN") + except: + pass + br_r =3D d_ratio(br_cond, interval_sec) + ins_r =3D d_ratio(ins, br_cond) + misp_r =3D d_ratio(br_m_cond, br_cond) + taken_metrics =3D [ + Metric("lpm_br_cond_retired", "Retired conditional branch instruct= ions.", + br_r, "insn/s"), + Metric("lpm_br_cond_insn_between_branches", + "The number of instructions divided by the number of condit= ional " + "branches.", ins_r, "insn"), + Metric("lpm_br_cond_mispred", + "Retired conditional branch instructions mispredicted as a " + "percentage of all conditional branches.", misp_r, "100%"), + ] + if not br_m_cond_nt: + return MetricGroup("lpm_br_cond", taken_metrics) + + br_r =3D d_ratio(br_cond_nt, interval_sec) + ins_r =3D d_ratio(ins, br_cond_nt) + misp_r =3D d_ratio(br_m_cond_nt, br_cond_nt) + + not_taken_metrics =3D [ + Metric("lpm_br_cond_retired", "Retired conditional not taken branc= h instructions.", + br_r, "insn/s"), + Metric("lpm_br_cond_insn_between_branches", + "The number of instructions divided by the number of not ta= ken conditional " + "branches.", ins_r, "insn"), + Metric("lpm_br_cond_mispred", + "Retired not taken conditional branch instructions mispredi= cted as a " + "percentage of all not taken conditional branches.", misp_r= , "100%"), + ] + return MetricGroup("lpm_br_cond", [ + MetricGroup("lpm_br_cond_nt", not_taken_metrics), + MetricGroup("lpm_br_cond_tkn", taken_metrics), + ]) + + def Far() -> Optional[MetricGroup]: + try: + br_far =3D Event("BR_INST_RETIRED.FAR_BRANCH") + except: + return None + + br_r =3D d_ratio(br_far, interval_sec) + ins_r =3D d_ratio(ins, br_far) + return MetricGroup("lpm_br_far", [ + Metric("lpm_br_far_retired", "Retired far control transfers per se= cond.", + br_r, "insn/s"), + Metric( + "lpm_br_far_insn_between_branches", + "The number of instructions divided by the number of far branc= hes.", + ins_r, "insn"), + ]) + + return MetricGroup("lpm_br", [Total(), Taken(), Conditional(), Far()], + description=3D"breakdown of retired branch instructio= ns") + + def main() -> None: global _args =20 @@ -151,6 +288,7 @@ def main() -> None: Rapl(), Smi(), Tsx(), + IntelBr(), ]) =20 =20 --=20 2.51.0.318.gd7df087d1a-goog