From nobody Sun Feb 8 20:00:11 2026 Received: from mail-dl1-f73.google.com (mail-dl1-f73.google.com [74.125.82.73]) (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 BC797328B6E for ; Thu, 8 Jan 2026 19:11:38 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=74.125.82.73 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1767899500; cv=none; b=BTWeG4FHKAXueDiBbZoIafCAMJeU9f8FW/jL03cyAH7p0HDShxS98BXAyMRFADyu0oU0q6OHPE4HHXC9RdBRooRGKEcGzJEAILiPOsirgvuIR+Aixr+kYq9V8F46f9AFv7xpLRBTq96ZHGJ3eqdYgHensaxphs2D2uZbSSXGIOA= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1767899500; c=relaxed/simple; bh=6ngkG0km3yB5xxyOrjatuk4rtbR7Z+mDw14r54hwsFQ=; h=Date:In-Reply-To:Mime-Version:References:Message-ID:Subject:From: To:Content-Type; b=GYg8MNa/ABCns9/uO46fawzHnIZBzmeRDAf0o02oVHzm2np5OPH5CG+kec40zJ9QRPz70aA80yOBXqViWhKW2f0/FIfxSlPxy65z7QGk4qhxY5Vro96NQLKSaMEt6P8FdAP+8hYGztCk2KNE00vmk89/hqfizzkusaBP6eLxkcQ= 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=w2kZzWpL; arc=none smtp.client-ip=74.125.82.73 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="w2kZzWpL" Received: by mail-dl1-f73.google.com with SMTP id a92af1059eb24-1219f27037fso13558289c88.1 for ; Thu, 08 Jan 2026 11:11:38 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20230601; t=1767899497; x=1768504297; 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=w2kZzWpL/4TEokXa5KxMfcZTdecYdTK6jCvqoEBPDHPGhYHtxpBwMRjxyCOBn+Acdw KpdaXM/qFcXobY0Z/pFGhDeJJ8eDUvKq0oRLPzjjE5FJJVdnauqplwEIrOvMnJlEh+4x JfVR7FtMG/vYTXvfVupkx6iXChBSNcpmMMEYSC5JIGYqtDfCd9aOIUd5C1IEFtLL2K8H sGk1WeKWg08z28xffg0tbYK6Gxob34SnR7dTqa87TVd4xMbVvG9iOQocOsknyE/sI1ts e0LrgkP/5pU/Ys8gH7Hf6rWgMgKg0IoUe4nl8XZUKkiQ5amDof+/tswnNTcH5DcZ1txY rTNQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1767899497; x=1768504297; 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=HUCesRzHbSLwyllmP7RTIAEx2jljKPAoYEE4PSK/oEX58F16c/VEmURrXCrMnRqJeH XZsSJyRx8I39kY4Cjs92frVnVfsfujLQVf+2l1rbySTbhibm71SNT0Gt8sDtOGPLZzPg OQ7QuAGMKcE70P6HlIE4++wo1LJL+UvFPS3B/PTjRXcD6KynafxfM8d/4kR+ea1g3BUQ NMnsEVfuYcKVqZfQGgq2vD8Cqz36DhHCR9h1BbcG9KcRYODIpYpjCMNmie8LXbl4AnwZ K5DuvZyHsqvc5unjNZC7tWLEnWDbrTYy3DPRUB/t77rhfTv6UOn55Ug/SibtBr7KaJVZ vZqw== X-Forwarded-Encrypted: i=1; AJvYcCWDxxGwq1Bzq+gj8gQv0xPP5EnzS4t4ztNqd3y7WLcyyLIBBEdzw0uoRxgkCz3LXpAuBKyczBHO/471qTM=@vger.kernel.org X-Gm-Message-State: AOJu0YyJ6lwOznagJLdHy7JI8an/Iee2D1YsPuGaVCfKq7HX7ScFIGhS PlcXvex0iVY/kF7sHAYxXcnwLAwxLyqI0hJH1iyR9GkPDUsKSBJm99SxgQpBqyBK6PB4vp+Fudz OuoF7OdgmVg== X-Google-Smtp-Source: AGHT+IFmDL1/Jm7y3jYHlRr52x4gg+K4AT98rUY39BCT7nJZLphOsKZS1B0cPFaGHiw4JXVPve3oNUa7bDW+ X-Received: from dlbcm27.prod.google.com ([2002:a05:7022:689b:b0:122:8e:6ea4]) (user=irogers job=prod-delivery.src-stubby-dispatcher) by 2002:a05:7022:686:b0:11d:f440:b743 with SMTP id a92af1059eb24-121f8ab9d25mr5769708c88.7.1767899497358; Thu, 08 Jan 2026 11:11:37 -0800 (PST) Date: Thu, 8 Jan 2026 11:10:36 -0800 In-Reply-To: <20260108191105.695131-1-irogers@google.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <20260108191105.695131-1-irogers@google.com> X-Mailer: git-send-email 2.52.0.457.g6b5491de43-goog Message-ID: <20260108191105.695131-7-irogers@google.com> Subject: [PATCH v10 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 , 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. 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