From nobody Thu Sep 11 21:22:25 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 4FC14C41513 for ; Wed, 16 Aug 2023 11:52:44 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S244808AbjHPLwN (ORCPT ); Wed, 16 Aug 2023 07:52:13 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:59184 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S244860AbjHPLv4 (ORCPT ); Wed, 16 Aug 2023 07:51:56 -0400 Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id C642B1FDE; Wed, 16 Aug 2023 04:51:53 -0700 (PDT) Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 944981063; Wed, 16 Aug 2023 04:52:34 -0700 (PDT) Received: from e127643.arm.com (unknown [10.57.4.137]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id 030A13F64C; Wed, 16 Aug 2023 04:51:49 -0700 (PDT) From: James Clark To: linux-perf-users@vger.kernel.org, irogers@google.com, john.g.garry@oracle.com, renyu.zj@linux.alibaba.com, acme@kernel.org Cc: James Clark , Will Deacon , Mike Leach , Leo Yan , Peter Zijlstra , Ingo Molnar , Mark Rutland , Alexander Shishkin , Jiri Olsa , Namhyung Kim , Adrian Hunter , Kajol Jain , Kan Liang , Haixin Yu , Nick Forrington , Eduard Zingerman , Sohom Datta , Rob Herring , linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org Subject: [PATCH v6 3/6] perf vendor events arm64: Update scale units and descriptions of common topdown metrics Date: Wed, 16 Aug 2023 12:47:45 +0100 Message-Id: <20230816114841.1679234-4-james.clark@arm.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230816114841.1679234-1-james.clark@arm.com> References: <20230816114841.1679234-1-james.clark@arm.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" Metrics will be published here [1] going forwards, but they have slightly different scale units. To allow autogenerated metrics to be added more easily, update the scale units to match. The more detailed descriptions have also been taken and added to the common file. [1]: https://gitlab.arm.com/telemetry-solution/telemetry-solution/-/tree/ma= in/data/pmu/cpu/ Acked-by: Ian Rogers Reviewed-by: John Garry Signed-off-by: James Clark --- tools/perf/pmu-events/arch/arm64/sbsa.json | 24 +++++++++++----------- 1 file changed, 12 insertions(+), 12 deletions(-) diff --git a/tools/perf/pmu-events/arch/arm64/sbsa.json b/tools/perf/pmu-ev= ents/arch/arm64/sbsa.json index f90b338261ac..4eed79a28f6e 100644 --- a/tools/perf/pmu-events/arch/arm64/sbsa.json +++ b/tools/perf/pmu-events/arch/arm64/sbsa.json @@ -1,34 +1,34 @@ [ { - "MetricExpr": "stall_slot_frontend / (#slots * cpu_cycles)", - "BriefDescription": "Frontend bound L1 topdown metric", + "MetricExpr": "100 * (stall_slot_frontend / (#slots * cpu_cycles))= ", + "BriefDescription": "This metric is the percentage of total slots = that were stalled due to resource constraints in the frontend of the proces= sor.", "DefaultMetricgroupName": "TopdownL1", "MetricGroup": "Default;TopdownL1", "MetricName": "frontend_bound", - "ScaleUnit": "100%" + "ScaleUnit": "1percent of slots" }, { - "MetricExpr": "(1 - op_retired / op_spec) * (1 - stall_slot / (#sl= ots * cpu_cycles))", - "BriefDescription": "Bad speculation L1 topdown metric", + "MetricExpr": "100 * ((1 - op_retired / op_spec) * (1 - stall_slot= / (#slots * cpu_cycles)))", + "BriefDescription": "This metric is the percentage of total slots = that executed operations and didn't retire due to a pipeline flush.\nThis i= ndicates cycles that were utilized but inefficiently.", "DefaultMetricgroupName": "TopdownL1", "MetricGroup": "Default;TopdownL1", "MetricName": "bad_speculation", - "ScaleUnit": "100%" + "ScaleUnit": "1percent of slots" }, { - "MetricExpr": "(op_retired / op_spec) * (1 - stall_slot / (#slots = * cpu_cycles))", - "BriefDescription": "Retiring L1 topdown metric", + "MetricExpr": "100 * ((op_retired / op_spec) * (1 - stall_slot / (= #slots * cpu_cycles)))", + "BriefDescription": "This metric is the percentage of total slots = that retired operations, which indicates cycles that were utilized efficien= tly.", "DefaultMetricgroupName": "TopdownL1", "MetricGroup": "Default;TopdownL1", "MetricName": "retiring", - "ScaleUnit": "100%" + "ScaleUnit": "1percent of slots" }, { - "MetricExpr": "stall_slot_backend / (#slots * cpu_cycles)", - "BriefDescription": "Backend Bound L1 topdown metric", + "MetricExpr": "100 * (stall_slot_backend / (#slots * cpu_cycles))", + "BriefDescription": "This metric is the percentage of total slots = that were stalled due to resource constraints in the backend of the process= or.", "DefaultMetricgroupName": "TopdownL1", "MetricGroup": "Default;TopdownL1", "MetricName": "backend_bound", - "ScaleUnit": "100%" + "ScaleUnit": "1percent of slots" } ] --=20 2.34.1