From patchwork Fri Jul 28 07:09:35 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jing Zhang X-Patchwork-Id: 13331307 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 AC6E9C001E0 for ; Fri, 28 Jul 2023 07:10:22 +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=5AlbHKsAFk9B+nhU0sg8aEsfew6EVqP96yqT3Oo68dY=; b=JxQIJ8LSZCPwzA uJkiCBpV956o3T9l3/ydfxpsDk77qsLWi0ncJKUD7rw6V0R8605bzq5yg0lB9e+txOEEyI3KQTM6d zQ1tBh194Qvr4AAJuF4ufuIIDHC0IX+ulRRUX13Tg+ylPS52yFqRjNxOVCkn9aIUPJqPuSQTg1sgI vPOlnYJettXgdjCP73qQ7EW2d7d85CT64u2j3cVoyCRi7IeFzAsa4rkAGXYfH9CoKalLauW2no/3M yJeYz+6OHwf5YTqa0tskIqS6L4TJ/EwEl1k9Sfif4QHbxhRlAzlySHVc/F2MQ89rM4fUvaIDPX+km ik8MNbio81HuGTdsAwfQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.96 #2 (Red Hat Linux)) id 1qPHbv-0023pz-0E; Fri, 28 Jul 2023 07:10:03 +0000 Received: from out30-132.freemail.mail.aliyun.com ([115.124.30.132]) by bombadil.infradead.org with esmtps (Exim 4.96 #2 (Red Hat Linux)) id 1qPHbi-0023lC-1u for linux-arm-kernel@lists.infradead.org; Fri, 28 Jul 2023 07:09:53 +0000 X-Alimail-AntiSpam: AC=PASS;BC=-1|-1;BR=01201311R201e4;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=12;SR=0;TI=SMTPD_---0VoP1ovS_1690528184; Received: from srmbuffer011165236051.sqa.net(mailfrom:renyu.zj@linux.alibaba.com fp:SMTPD_---0VoP1ovS_1690528184) by smtp.aliyun-inc.com; Fri, 28 Jul 2023 15:09:45 +0800 From: Jing Zhang To: Namhyung Kim , Arnaldo Carvalho de Melo , Will Deacon Cc: John Garry , Ian Rogers , linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-perf-users@vger.kernel.org, linux-doc@vger.kernel.org, Zhuo Song , Jing Zhang , Shuai Xue Subject: [PATCH v5 3/3] docs: perf: Update metric usage for Alibaba's T-Head PMU driver Date: Fri, 28 Jul 2023 15:09:35 +0800 Message-Id: <1690528175-2499-4-git-send-email-renyu.zj@linux.alibaba.com> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1690528175-2499-1-git-send-email-renyu.zj@linux.alibaba.com> References: <1690528175-2499-1-git-send-email-renyu.zj@linux.alibaba.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20230728_000950_819031_AB7C2B9E X-CRM114-Status: UNSURE ( 7.79 ) X-CRM114-Notice: Please train this message. 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 Alibaba's T-Head ali_drw PMU supports DDR bandwidth metrics. Update its usage in the documentation. Signed-off-by: Jing Zhang Acked-by: Ian Rogers Reviewed-by: John Garry --- Documentation/admin-guide/perf/alibaba_pmu.rst | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/Documentation/admin-guide/perf/alibaba_pmu.rst b/Documentation/admin-guide/perf/alibaba_pmu.rst index 11de998..7d84002 100644 --- a/Documentation/admin-guide/perf/alibaba_pmu.rst +++ b/Documentation/admin-guide/perf/alibaba_pmu.rst @@ -88,6 +88,11 @@ data bandwidth:: -e ali_drw_27080/hif_rmw/ \ -e ali_drw_27080/cycle/ -- sleep 10 +Example usage of counting all memory read/write bandwidth by metric:: + + perf stat -M ddr_read_bandwidth.all -- sleep 10 + perf stat -M ddr_write_bandwidth.all -- sleep 10 + The average DRAM bandwidth can be calculated as follows: - Read Bandwidth = perf_hif_rd * DDRC_WIDTH * DDRC_Freq / DDRC_Cycle