From nobody Thu Sep 18 05:41:26 2025 Received: from mail-pf1-f202.google.com (mail-pf1-f202.google.com [209.85.210.202]) (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 AE119238C10 for ; Thu, 4 Sep 2025 04:47:11 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.210.202 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1756961233; cv=none; b=qAtCn0xZj5FoojyV+FmhgCy80rUjBRVjIA3ngGkefn2VVBzAxCPW2ZITYUhiMU2IxiUnmPBWSiPUNabNGwmxpw3CEk74yMq2j8AYdswT6BED3Uqw99/JadgzXgwyjO/CRZqEE3ufJtzHrM2/LXVAU2xypmZhLCSKSsAG0GNsweE= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1756961233; c=relaxed/simple; bh=hKncWC1+jOuJpYM18phIZ2V0cd6uiJueX7lFB7eDbNI=; h=Date:In-Reply-To:Mime-Version:References:Message-ID:Subject:From: To:Content-Type; b=QlOHx1ldkgAs4A2oYztI6dvvLmXP/BPeMBAT8VFBq8ttRz7+N5YOvHy2OT444KBxss+mzI+a4D4FbEn08sgFOHXfIrTd4Gm1fi0Jf0DCa6LIuZJTScyLTPXKh/SMOzjhEU5Yl5RlS8hR48TEjZ0Yz+/MrunI/FNveNHthzdxJUI= 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=cbqsjezq; arc=none smtp.client-ip=209.85.210.202 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="cbqsjezq" Received: by mail-pf1-f202.google.com with SMTP id d2e1a72fcca58-7724688833bso664110b3a.2 for ; Wed, 03 Sep 2025 21:47:11 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20230601; t=1756961231; x=1757566031; 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=bpXSfxqJuF7aaOwysDVqZNPh4NQdI3HR21+/0eUXRKQ=; b=cbqsjezqxz5pxZcOWk9gpoPI5X6Ggu3qe5NBAVVl/EWvhlYb58h4iQjr2ruwwREzM9 m98z0WTSVSVZ92YiBPXyhf4+3DnSaSVuROk5TyhF0HT0DHUvlqAj9NSzZu/JgY8CskuU GuG51gnwiFJp/jMXZkfo/VtuGI9iH0/gZEw6rIn6h1v5lY0wPvDUO6TPD4zbYZYXuVFE fAw2ylxg38sFG44Pw+hq3L0tsq9lEjBBnYtUcOff7VimIsnHS0y4PK9V3LKzKcg5TKPs l1LDvIUdGwCWGDJNhSWCid3J2ATOI9gQcdW83f0DAuIfgyF4yehmSNRNRbcJSz9bbbzS G1FA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1756961231; x=1757566031; 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=bpXSfxqJuF7aaOwysDVqZNPh4NQdI3HR21+/0eUXRKQ=; b=QesL6VJ2p3KBTTi2iXGmSNg3V7YBF984CcD5prhl3uOvTxxPRtcm9bGzNxkrX2D0o1 /aooY1bQayrypIH6K8a1sZ2qf6tt2zLs8NlZPb4rh32vg+uRw3/yNVpud4ydw2Ss0LIn fTuApMFlIyiFV6MKygcyTcPVPSDrzMP5+PX6pZP2NXBfsVOFrFpzirrcpYb7wSTgwuys xkUoJsLKpcZ7640qxoSVgnGN4KB4ejvvyH2fRk5y74ozEI9isoLVwJnJ5gYL8QOYtYSN Tv8tUw+iSCbuRpLEg0WlgFn5k6wMAlZFddG+o62EeyQocscKkWvEvVYvfD4gfu0OeyfI o1bQ== X-Forwarded-Encrypted: i=1; AJvYcCVYSzdaVDloiQlTeMOUjvU/DiYXojb17Cw6AlV93KMvd/n2qply298+fl/SP8NUUptrdQNmn1CvkS4ahgg=@vger.kernel.org X-Gm-Message-State: AOJu0Yxdgmhtocc+5FWAEK0tco8T0Q8tnBDqv+0nJJgaFGcz//LVkmNT 902zMJNbv8pSV6Uz37KGyaMsWmUQsjMZ8lZWQ4DjklXoWgll8aSBIiM/xdN3eKmoA2gy6kCHqT+ RlwEvTAQ94Q== X-Google-Smtp-Source: AGHT+IE3WF8uKyH/i78+XWYnMrtoROSsHBvKnIJOoUSzDL3290slXmHj3n1sXU953SKxKOItieAgnNlY7Mfe X-Received: from pjbpq12.prod.google.com ([2002:a17:90b:3d8c:b0:327:be52:966d]) (user=irogers job=prod-delivery.src-stubby-dispatcher) by 2002:a05:6a20:734a:b0:243:afbb:c9ee with SMTP id adf61e73a8af0-243d6dce669mr27385305637.7.1756961230725; Wed, 03 Sep 2025 21:47:10 -0700 (PDT) Date: Wed, 3 Sep 2025 21:46:38 -0700 In-Reply-To: <20250904044653.1002362-1-irogers@google.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <20250904044653.1002362-1-irogers@google.com> X-Mailer: git-send-email 2.51.0.338.gd7d06c2dae-goog Message-ID: <20250904044653.1002362-8-irogers@google.com> Subject: [PATCH v6 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 6d29d9ff0a48..dfee782596e8 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 2.51.0.338.gd7d06c2dae-goog