From nobody Wed Dec 10 20:15:14 2025 Received: from mail-pg1-f202.google.com (mail-pg1-f202.google.com [209.85.215.202]) (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 4871B30BBB9 for ; Thu, 13 Nov 2025 03:21:29 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.215.202 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1763004092; cv=none; b=bA3DFmxbI/NCsiIKd5S7JPrsfZ5TcHHPWZpjHdM4nVqMZsUk+UwwtCGVJEb2fFYPIwNOK81xXxBgiII8CS8lQ/ttlp1vUefXgXWBIBlViP7UtXBHNFeG1ksVWcizX6nzEmjF07u5cZ5gasy/UVvegmlqVgGzbhMQ127BMoUOaxY= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1763004092; c=relaxed/simple; bh=MTpvxNQIsbhE+YweGRvxHhdlQZZ2uFXAAWC1hzEIqfY=; h=Date:In-Reply-To:Mime-Version:References:Message-ID:Subject:From: To:Content-Type; b=aGCbmX9xcbEK+L/d3ApysGqfUjUB+O1YrKMVB+1zCjKbsaDWlIoB0xo/jYF/SZB0EcnW7F805b8NqdXG7pzk2UtQkm92ez4QkHGuBXgaJDOAYQnQUaJUOYg2oIa7UBwDph2kRzQvSpuWkasPSB15k8tyl/cBunMK7UQams12L/A= 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=QQMHA3kt; arc=none smtp.client-ip=209.85.215.202 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="QQMHA3kt" Received: by mail-pg1-f202.google.com with SMTP id 41be03b00d2f7-b99f6516262so917763a12.3 for ; Wed, 12 Nov 2025 19:21:29 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20230601; t=1763004089; x=1763608889; 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=46tAwbQ8f//xN3Ry13qDNDr4Q30XuGVyKpDV1Wax+Xg=; b=QQMHA3ktMfiU+vMrw84poHbX/5TBe1W2ZbjIbibCAx1281clSt0YOY4Hgt80bZccwW eZhyg7XFk0JOB3LvgFyasUqrXZa7W8Mix4Kea9zktSDg2Hha1LPRmPYsHlJp7FF5Bk2Y xlkt8yftD8EirW+9LiCc2oT3chhn6Z/FAp5qtoZK4opiy0X0Lcst39dIZ+QnmND6/UM6 4EVSy84JPBuKZGd58fJM5Ro16MBwHDJfeYGjFORMYaRiUcUOvtOpt/hCnfIjVnjVdW7U FU2WbKt5ezx6lm8pCsH+fGgDKc2y91oQR/NgXc835V5SnHSyzRJSf964nP0eL4nel6bX iWxw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1763004089; x=1763608889; 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=46tAwbQ8f//xN3Ry13qDNDr4Q30XuGVyKpDV1Wax+Xg=; b=ZHkZlHhkU7SIpHEf1IKHXyc/aLSGMDTwW5S44sFcthkkRfvYLJRWB2GZSWUK1x2Pm+ KA3ksH1QVoGu4Xo5B+HEB+vr8PW+7L1OP2a0mivddWKPBIKboQpgHFJ6yfIgwXg7OhXi IiZjiGMhRbW+jWfYauNiM6vDzxehxp5Tq7ZNqufJ8uyPNqVz37ubLUJ+qxbRiPQ6qz/1 uTOPcSZcnJabLU70WhTXyktUS3ZxCvf4wTSkgIAsVUCNEZpZcFyhNmQmULaWvWNGRniS v9O19kE54dqftvEKlAC8W7g6ftiQwXBY3WN1OuooyeQCaRfb/9ElsafujWjCUyDpN5Zw rDXg== X-Forwarded-Encrypted: i=1; AJvYcCX1n6OlUUF8+YnIiltg0n6JBIZ+G1tx0SsOhc3gl+nMaxlQh6cRI9VY7vc41z4JHO+Dycky18yURny6X2s=@vger.kernel.org X-Gm-Message-State: AOJu0Yy/5RzXE9VWFjFBmKihU2kK+xQuaSpCeNcv9AahJyXrAuAkQHB9 5j32Bb4U6QKgimq9eohpB2iFu5Elw4dhxqvwsNh+ZW/AiZYv3YHz+syT86Oe7S7T03/AZy3DNsZ wUSEaBWq9sg== X-Google-Smtp-Source: AGHT+IFxjDiSEA9vnZn0vC4yoKImGg7+gOZ9Xm6w4b9Ab+vLCsp/wcSbIBstaW7u8IZXDNuQ5mIrUqa4yYk2 X-Received: from dybmw23.prod.google.com ([2002:a05:7300:cd97:b0:2a4:4bd0:6ed8]) (user=irogers job=prod-delivery.src-stubby-dispatcher) by 2002:a05:6a21:8906:b0:32b:7220:8536 with SMTP id adf61e73a8af0-35909399efemr6057032637.16.1763004088709; Wed, 12 Nov 2025 19:21:28 -0800 (PST) Date: Wed, 12 Nov 2025 19:20:06 -0800 In-Reply-To: <20251113032040.1994090-1-irogers@google.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <20251113032040.1994090-1-irogers@google.com> X-Mailer: git-send-email 2.51.2.1041.gc1ab5b90ca-goog Message-ID: <20251113032040.1994090-19-irogers@google.com> Subject: [PATCH v8 18/52] 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 , Samantha Alt , 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. Signed-off-by: Ian Rogers --- tools/perf/pmu-events/amd_metrics.py | 104 +++++++++++++++++++++++++++ 1 file changed, 104 insertions(+) diff --git a/tools/perf/pmu-events/amd_metrics.py b/tools/perf/pmu-events/a= md_metrics.py index 42e46b33334d..1880ccf9c6fc 100755 --- a/tools/perf/pmu-events/amd_metrics.py +++ b/tools/perf/pmu-events/amd_metrics.py @@ -18,6 +18,109 @@ 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_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_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 +186,7 @@ def main() -> None: _zen_model =3D int(_args.model[6:]) =20 all_metrics =3D MetricGroup("", [ + AmdBr(), AmdUpc(), Idle(), Rapl(), --=20 2.51.2.1041.gc1ab5b90ca-goog