From nobody Tue Feb 10 04:12:39 2026 Received: from mail-dy1-f202.google.com (mail-dy1-f202.google.com [74.125.82.202]) (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 CF30A35FF52 for ; Tue, 27 Jan 2026 18:45:38 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=74.125.82.202 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1769539540; cv=none; b=r4t1K6pezIS5eHLA5gCO5TmthcaJ6n0NYsvEjhbc7+oUPj/agza5M0vF2Vpzj74TqJPGj/Z6QOPn5zJV8tIIa/yCeRc/06VSlpMrxOzMAJi8bSgtl1QFQFM58+YNYGfXWiq1HxA6Hab/mDs8n7joYXTOoPxotT2Iy4e9jF598Rs= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1769539540; c=relaxed/simple; bh=6ngkG0km3yB5xxyOrjatuk4rtbR7Z+mDw14r54hwsFQ=; h=Date:In-Reply-To:Mime-Version:References:Message-ID:Subject:From: To:Content-Type; b=u77n3muQ6F4XK05/LeMPD9SEDO8HI7gL+YLZhHhpQ4wd7GB8+FqGLnC1AuZEWZE47/maQ3Kh7aTuMzOHKJoW4XHf+Gy0isUCb7/6hCicsj3tUrynQsdW6lFUePkR0aJ9jKKZScfbewIWlbt0Npwye0bNQyFoIgoaD22IOfZoQyo= 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=ignUx1/z; arc=none smtp.client-ip=74.125.82.202 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="ignUx1/z" Received: by mail-dy1-f202.google.com with SMTP id 5a478bee46e88-2b74aff34efso4921704eec.1 for ; Tue, 27 Jan 2026 10:45:38 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20230601; t=1769539538; x=1770144338; 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=8CoVpu9C7kwqCyjP7uTz46EcKVk9Lj7iUFKEqIBdIZM=; b=ignUx1/zsO9C19k9Pd/ywY9PKaqtYeKxvn0TNGsjfZRQHpqAsOIHz1lfjwxfHMIggi o9EIJWUybBAJpYFUWslOWDoBOfbL6ftxgsGtSFcUJ8RdcDmyeVi3z5GEqKfg6ugohxtF SlZUPuzItNUqLx79Rl+o2Rfc3yV54Go8qovdV2XqS+K1hh3nrA1udMTFEJoklSEGwnHq C/kzsNUHhimsDcFrLPcxhV/5EHZD2k0m03qYNI8milY2R6HQAPJlVydbEmnzlZw+fSZR MApaMm5miSrCNulHTjLqmaJYnHpfVm6vlDf2HuH12EyK2wGqMXArCOd/FwaUPmkX6Jut 7IaQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1769539538; x=1770144338; 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=8CoVpu9C7kwqCyjP7uTz46EcKVk9Lj7iUFKEqIBdIZM=; b=iZqrfWRCSeHRAZ+QAdMllIn52++x8Nm++nEQ3YcpDOqMA2kd9TiDeOb+gN8C2tSD+5 V//v39M7IgPHAyeNOqlF7/PXtcRFugMMp6SxNikbfSOzP/nma83PlPiwL5IDVr2i/+xu JpWZpCuquyrj5gQYiRF5dQROo16He25cxuEXVwe/as5wTAnLEfTHBTlVwm0s7iNnfnRG /BUzK8nYENSqmXh62rGxax0taj9GPOmsRFRc6kV6vP+ffrZFflK6S5k7ZifDKpKTcQaE JXbf+GymUvKvMuECdqArpZkOkqLJKJsT2Kcif4GMsCUHQ+JA+tzEU7/rW09YM8LurOtx QPtQ== X-Forwarded-Encrypted: i=1; AJvYcCXnd7C4fYBhNAaPvRRt+TPFDX/hz1vMNKtbUKnPDy+iprw9KvSBVPUwTF/nyLHsv6WhWzYScU0qxvj4BeE=@vger.kernel.org X-Gm-Message-State: AOJu0YwOi1S0cYG+kN5yeg27grWd4GVoYuQVXQnS7nf/6fhXN7uMRA/V XyumKrZMlsQmtAE3jvrWGy0XIa4VC/p8DPO2IHMHbsWUyDyH7lZgXNoBQEJBSgKucHfCRTB6r9I VtkE/LDqZkQ== X-Received: from dybdr31.prod.google.com ([2002:a05:7300:b29f:b0:2b6:bdce:fb0]) (user=irogers job=prod-delivery.src-stubby-dispatcher) by 2002:a05:7300:72c5:b0:2b0:51a7:509a with SMTP id 5a478bee46e88-2b78da12271mr1505624eec.33.1769539537837; Tue, 27 Jan 2026 10:45:37 -0800 (PST) Date: Tue, 27 Jan 2026 10:44:37 -0800 In-Reply-To: <20260127184506.3059493-1-irogers@google.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <20260127184506.3059493-1-irogers@google.com> X-Mailer: git-send-email 2.52.0.457.g6b5491de43-goog Message-ID: <20260127184506.3059493-7-irogers@google.com> Subject: [PATCH v11 06/35] perf jevents: Add br metric group for branch statistics on AMD From: Ian Rogers To: Adrian Hunter , Alexander Shishkin , Arnaldo Carvalho de Melo , Benjamin Gray , Caleb Biggers , Edward Baker , Ian Rogers , Ingo Molnar , James Clark , Jing Zhang , Jiri Olsa , John Garry , Leo Yan , Namhyung Kim , Perry Taylor , Peter Zijlstra , Sandipan Das , Thomas Falcon , Weilin Wang , Xu Yang , linux-kernel@vger.kernel.org, linux-perf-users@vger.kernel.org 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. The lack of conditional events on anything but zen2 means this category is lacking on zen1, zen3 and zen4. Reviewed-by: Sandipan Das Signed-off-by: Ian Rogers --- tools/perf/pmu-events/amd_metrics.py | 105 +++++++++++++++++++++++++++ 1 file changed, 105 insertions(+) diff --git a/tools/perf/pmu-events/amd_metrics.py b/tools/perf/pmu-events/a= md_metrics.py index 42e46b33334d..38948f63cb52 100755 --- a/tools/perf/pmu-events/amd_metrics.py +++ b/tools/perf/pmu-events/amd_metrics.py @@ -18,6 +18,110 @@ cycles =3D Event("cycles") smt_cycles =3D Select(cycles / 2, Literal("#smt_on"), cycles) =20 =20 +def AmdBr(): + def Total() -> MetricGroup: + br =3D Event("ex_ret_brn") + br_m_all =3D Event("ex_ret_brn_misp") + br_clr =3D Event("ex_ret_brn_cond_misp", + "ex_ret_msprd_brnch_instr_dir_msmtch", + "ex_ret_brn_resync") + + br_r =3D d_ratio(br, interval_sec) + ins_r =3D d_ratio(ins, br) + misp_r =3D d_ratio(br_m_all, br) + clr_r =3D d_ratio(br_clr, interval_sec) + + 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, t= hat were " + "not correctly predicted as a percentage of all branch ins= trucions.", + misp_r, "100%"), + Metric("lpm_br_total_insn_between_branches", + "The number of instructions divided by the number of br= anches.", + ins_r, "insn"), + Metric("lpm_br_total_insn_fe_resteers", + "The number of resync branches per second.", clr_r, "re= q/s") + ]) + + def Taken() -> MetricGroup: + br =3D Event("ex_ret_brn_tkn") + br_m_tk =3D Event("ex_ret_brn_tkn_misp") + br_r =3D d_ratio(br, interval_sec) + ins_r =3D d_ratio(ins, br) + misp_r =3D d_ratio(br_m_tk, br) + return MetricGroup("lpm_br_taken", [ + Metric("lpm_br_taken_retired", + "The number of taken branches that were retired per sec= ond.", + 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.", mis= p_r, + "100%"), + Metric( + "lpm_br_taken_insn_between_branches", + "The number of instructions divided by the number of taken= branches.", + ins_r, "insn"), + ]) + + def Conditional() -> Optional[MetricGroup]: + global _zen_model + br =3D Event("ex_ret_brn_cond", "ex_ret_cond") + br_r =3D d_ratio(br, interval_sec) + ins_r =3D d_ratio(ins, br) + + metrics =3D [ + Metric("lpm_br_cond_retired", "Retired conditional branch inst= ructions.", + br_r, "insn/s"), + Metric("lpm_br_cond_insn_between_branches", + "The number of instructions divided by the number of co= nditional " + "branches.", ins_r, "insn"), + ] + if _zen_model =3D=3D 2: + br_m_cond =3D Event("ex_ret_cond_misp") + misp_r =3D d_ratio(br_m_cond, br) + metrics +=3D [ + Metric("lpm_br_cond_mispred", + "Retired conditional branch instructions mispredict= ed as a " + "percentage of all conditional branches.", misp_r, = "100%"), + ] + + return MetricGroup("lpm_br_cond", metrics) + + def Fused() -> MetricGroup: + br =3D Event("ex_ret_fused_instr", "ex_ret_fus_brnch_inst") + br_r =3D d_ratio(br, interval_sec) + ins_r =3D d_ratio(ins, br) + return MetricGroup("lpm_br_cond", [ + Metric("lpm_br_fused_retired", + "Retired fused branch instructions per second.", br_r, = "insn/s"), + Metric( + "lpm_br_fused_insn_between_branches", + "The number of instructions divided by the number of fused= " + "branches.", ins_r, "insn"), + ]) + + def Far() -> MetricGroup: + br =3D Event("ex_ret_brn_far") + br_r =3D d_ratio(br, interval_sec) + ins_r =3D d_ratio(ins, br) + return MetricGroup("lpm_br_far", [ + Metric("lpm_br_far_retired", "Retired far control transfers pe= r second.", + br_r, "insn/s"), + Metric( + "lpm_br_far_insn_between_branches", + "The number of instructions divided by the number of far b= ranches.", + ins_r, "insn"), + ]) + + return MetricGroup("lpm_br", [Total(), Taken(), Conditional(), Fused()= , Far()], + description=3D"breakdown of retired branch instruct= ions") + + def AmdUpc() -> Metric: ops =3D Event("ex_ret_ops", "ex_ret_cops") upc =3D d_ratio(ops, smt_cycles) @@ -83,6 +187,7 @@ def main() -> None: _zen_model =3D int(_args.model[6:]) =20 all_metrics =3D MetricGroup("", [ + AmdBr(), AmdUpc(), Idle(), Rapl(), --=20 2.52.0.457.g6b5491de43-goog