From nobody Tue Sep 16 06:41:25 2025 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 278E8C5479D for ; Fri, 6 Jan 2023 15:06:11 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235430AbjAFPGI (ORCPT ); Fri, 6 Jan 2023 10:06:08 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:55772 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234982AbjAFPFt (ORCPT ); Fri, 6 Jan 2023 10:05:49 -0500 Received: from out30-44.freemail.mail.aliyun.com (out30-44.freemail.mail.aliyun.com [115.124.30.44]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 214F35E0BE; Fri, 6 Jan 2023 07:05:46 -0800 (PST) X-Alimail-AntiSpam: AC=PASS;BC=-1|-1;BR=01201311R131e4;CH=green;DM=||false|;DS=||;FP=0|-1|-1|-1|0|-1|-1|-1;HT=ay29a033018046050;MF=renyu.zj@linux.alibaba.com;NM=1;PH=DS;RN=21;SR=0;TI=SMTPD_---0VZ-UXmq_1673017540; Received: from srmbuffer011165236051.sqa.eu95(mailfrom:renyu.zj@linux.alibaba.com fp:SMTPD_---0VZ-UXmq_1673017540) by smtp.aliyun-inc.com; Fri, 06 Jan 2023 23:05:41 +0800 From: Jing Zhang To: John Garry , Ian Rogers Cc: Xing Zhengjun , Will Deacon , James Clark , Mike Leach , Leo Yan , linux-arm-kernel@lists.infradead.org, linux-perf-users@vger.kernel.org, linux-kernel@vger.kernel.org, Peter Zijlstra , Ingo Molnar , Arnaldo Carvalho de Melo , Mark Rutland , Alexander Shishkin , Jiri Olsa , Namhyung Kim , Andrew Kilroy , Shuai Xue , Zhuo Song , Jing Zhang Subject: [PATCH v6 2/7] perf vendor events arm64: Add topdown L1 metrics for neoverse-n2-v2 Date: Fri, 6 Jan 2023 23:05:24 +0800 Message-Id: <1673017529-1429208-3-git-send-email-renyu.zj@linux.alibaba.com> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1673017529-1429208-1-git-send-email-renyu.zj@linux.alibaba.com> References: <1673017529-1429208-1-git-send-email-renyu.zj@linux.alibaba.com> Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Due to the wrong count of stall_slot and stall_slot_frontend on neoverse-n2, the real stall_slot and real stall_slot_frontend need to subtract cpu_cycles, so overwrite the "MetricExpr" for neoverse-n2. Reference from ARM neoverse-n2 errata notice [0], D117. Since neoverse-n2/neoverse-v2 does not yet support topdown L2, metric groups such as Cache, TLB, Branch, InstructionsMix and PEutilization will be added to further analysis of performance bottlenecks in the following patches. Reference from ARM PMU guide [1][2]. [0] https://documentation-service.arm.com/static/636a66a64e6cf12278ad89cb?t= oken=3D [1] https://documentation-service.arm.com/static/628f8fa3dfaf015c2b76eae8?t= oken=3D [2] https://documentation-service.arm.com/static/62cfe21e31ea212bb6627393?t= oken=3D Signed-off-by: Jing Zhang Acked-by: Ian Rogers --- .../arch/arm64/arm/neoverse-n2-v2/metrics.json | 17 +++++++++++++= ++++ 1 file changed, 17 insertions(+) create mode 100644 tools/perf/pmu-events/arch/arm64/arm/neoverse-n2-v2/met= rics.json diff --git a/tools/perf/pmu-events/arch/arm64/arm/neoverse-n2-v2/metrics.js= on b/tools/perf/pmu-events/arch/arm64/arm/neoverse-n2-v2/metrics.json new file mode 100644 index 0000000..4e7417f --- /dev/null +++ b/tools/perf/pmu-events/arch/arm64/arm/neoverse-n2-v2/metrics.json @@ -0,0 +1,17 @@ +[ + { + "ArchStdEvent": "FRONTEND_BOUND", + "MetricExpr": "((stall_slot_frontend) if (#slots - 5) else (stall_= slot_frontend - cpu_cycles)) / (#slots * cpu_cycles)" + }, + { + "ArchStdEvent": "BAD_SPECULATION", + "MetricExpr": "(1 - op_retired / op_spec) * (1 - (stall_slot if (#= slots - 5) else (stall_slot - cpu_cycles)) / (#slots * cpu_cycles))" + }, + { + "ArchStdEvent": "RETIRING", + "MetricExpr": "(op_retired / op_spec) * (1 - (stall_slot if (#slot= s - 5) else (stall_slot - cpu_cycles)) / (#slots * cpu_cycles))" + }, + { + "ArchStdEvent": "BACKEND_BOUND" + } +] --=20 1.8.3.1