From patchwork Thu Nov 24 17:14:43 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jing Zhang X-Patchwork-Id: 13055202 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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 959B5C433FE for ; Thu, 24 Nov 2022 17:16:21 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:MIME-Version:List-Subscribe:List-Help: List-Post:List-Archive:List-Unsubscribe:List-Id:References:In-Reply-To: Message-Id:Date:Subject:Cc:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=5qz6Mk6s0Znlx5ysSS4xJq3Pl5zjkCXNaW/HgTHRcIw=; b=FmRicFb2Mb+xvM 5g2Wb+kEdYhtse5TKig7ffYkWZph7Me0ot4y6BN0/ooNspumobnKQGEgsxsnXbC9VWNRjhfK8JCFi YkVOc3XfdelZ1RDpDKXNWTlYlLPrQ/DOiz5SdZ9FfRdet7akO09Vg/t2+89mtUdxKJMgwGfvjDDan 3T4la3PSYZwCSzF8X21UHw6B524uiOnvykCHiWeYRb2L03KWgNj9AHf9iU+S4HzQmUGNuvN0qIGYC Drpk7+z/46Ck+lg+hYwO3fQc5mDCvz14DpzHUVcS7spn5VNpDZ62pi2VSx1P1B7lEk6U63lQNUNrn GFcoNELt1ihBpCg8zDGw==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1oyFoj-00AMnd-RW; Thu, 24 Nov 2022 17:15:17 +0000 Received: from out30-57.freemail.mail.aliyun.com ([115.124.30.57]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1oyFoY-00AMcS-E3 for linux-arm-kernel@lists.infradead.org; Thu, 24 Nov 2022 17:15:10 +0000 X-Alimail-AntiSpam: AC=PASS;BC=-1|-1;BR=01201311R271e4;CH=green;DM=||false|;DS=||;FP=0|-1|-1|-1|0|-1|-1|-1;HT=ay29a033018045168;MF=renyu.zj@linux.alibaba.com;NM=1;PH=DS;RN=21;SR=0;TI=SMTPD_---0VVbtc6r_1669310097; Received: from j66e01291.sqa.eu95.tbsite.net(mailfrom:renyu.zj@linux.alibaba.com fp:SMTPD_---0VVbtc6r_1669310097) by smtp.aliyun-inc.com; Fri, 25 Nov 2022 01:14:58 +0800 From: Jing Zhang To: John Garry , Ian Rogers , Xing Zhengjun , Will Deacon , James Clark , Mike Leach , Leo Yan Cc: 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 v3 1/6] perf vendor events arm64: Add topdown L1 metrics for neoverse-n2 Date: Fri, 25 Nov 2022 01:14:43 +0800 Message-Id: <1669310088-13482-2-git-send-email-renyu.zj@linux.alibaba.com> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1669310088-13482-1-git-send-email-renyu.zj@linux.alibaba.com> References: <1669310088-13482-1-git-send-email-renyu.zj@linux.alibaba.com> In-Reply-To: <1668411720-3581-1-git-send-email-renyu.zj@linux.alibaba.com> References: <1668411720-3581-1-git-send-email-renyu.zj@linux.alibaba.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20221124_091506_674209_1769BC5E X-CRM114-Status: GOOD ( 12.39 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org The formula of topdown L1 on neoverse-n2 is from ARM sbsa7.0 platform design document [0], D37-38. However, 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 correct the expression of topdown metrics. Reference from ARM neoverse-n2 errata notice [1], D117. Since neoverse-n2 does not yet support topdown L2, metricgroups 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 [2][3]. [0] https://documentation-service.arm.com/static/60250c7395978b529036da86?token= [1] https://documentation-service.arm.com/static/636a66a64e6cf12278ad89cb?token= [2] https://documentation-service.arm.com/static/628f8fa3dfaf015c2b76eae8?token= [3] https://documentation-service.arm.com/static/62cfe21e31ea212bb6627393?token= Signed-off-by: Jing Zhang --- .../arch/arm64/arm/neoverse-n2/metrics.json | 34 ++++++++++++++++++++++ 1 file changed, 34 insertions(+) create mode 100644 tools/perf/pmu-events/arch/arm64/arm/neoverse-n2/metrics.json diff --git a/tools/perf/pmu-events/arch/arm64/arm/neoverse-n2/metrics.json b/tools/perf/pmu-events/arch/arm64/arm/neoverse-n2/metrics.json new file mode 100644 index 0000000..8628140 --- /dev/null +++ b/tools/perf/pmu-events/arch/arm64/arm/neoverse-n2/metrics.json @@ -0,0 +1,34 @@ +[ + { + "MetricExpr": "(stall_slot_frontend - cpu_cycles) / (5 * cpu_cycles)", + "PublicDescription": "Frontend bound L1 topdown metric", + "BriefDescription": "Frontend bound L1 topdown metric", + "MetricGroup": "TopdownL1", + "MetricName": "frontend_bound", + "ScaleUnit": "100%" + }, + { + "MetricExpr": "(1 - op_retired / op_spec) * (1 - (stall_slot - cpu_cycles) / (5 * cpu_cycles))", + "PublicDescription": "Bad speculation L1 topdown metric", + "BriefDescription": "Bad speculation L1 topdown metric", + "MetricGroup": "TopdownL1", + "MetricName": "bad_speculation", + "ScaleUnit": "100%" + }, + { + "MetricExpr": "(op_retired / op_spec) * (1 - (stall_slot - cpu_cycles) / (5 * cpu_cycles))", + "PublicDescription": "Retiring L1 topdown metric", + "BriefDescription": "Retiring L1 topdown metric", + "MetricGroup": "TopdownL1", + "MetricName": "retiring", + "ScaleUnit": "100%" + }, + { + "MetricExpr": "stall_slot_backend / (5 * cpu_cycles)", + "PublicDescription": "Backend Bound L1 topdown metric", + "BriefDescription": "Backend Bound L1 topdown metric", + "MetricGroup": "TopdownL1", + "MetricName": "backend_bound", + "ScaleUnit": "100%" + } +]