From patchwork Tue Jun 20 07:12:36 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jing Zhang X-Patchwork-Id: 13285236 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 068CCEB64DB for ; Tue, 20 Jun 2023 07:13:20 +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=56uJ8uCr/Jmh51n53EdgDFdujFMZmWKmdG/IQio2Cy0=; b=tlH+4nTMMy0xpo CdulNpPAfEpNHhwseFcUJ+gwWW5fseRYzthwtqrXqD70FmKBWnBARXBcl3J+8zLtEMtTnUcU8qZvv DGy2RELyq7+N4TK2Do9euLqI+6wWt7OUOr7wmuyzHEQcpT5h6x8BagZNVET2zADOONeM+qmBEMVfZ 4nQQ8g5UTWHPwjYI0dAeLpNNDSKm44GeVKK51rnWh+56YKUBOjuhV++jWhxkOTp1FFyekWgFxEy4b KvcEdwl74bkm/iPsTBQo//6a4V6oMAiX7q4Vy6H6OsBEt75qNqBvF0WVgr+1ebJMcL6ZINSsf7N6P 1D9eOn3GH6zr5q9YEWrQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.96 #2 (Red Hat Linux)) id 1qBVXv-00ALun-3B; Tue, 20 Jun 2023 07:12:59 +0000 Received: from out30-118.freemail.mail.aliyun.com ([115.124.30.118]) by bombadil.infradead.org with esmtps (Exim 4.96 #2 (Red Hat Linux)) id 1qBVXp-00ALqt-31 for linux-arm-kernel@lists.infradead.org; Tue, 20 Jun 2023 07:12:57 +0000 X-Alimail-AntiSpam: AC=PASS;BC=-1|-1;BR=01201311R951e4;CH=green;DM=||false|;DS=||;FP=0|-1|-1|-1|0|-1|-1|-1;HT=ay29a033018046059;MF=renyu.zj@linux.alibaba.com;NM=1;PH=DS;RN=21;SR=0;TI=SMTPD_---0Vlamlc3_1687245167; Received: from srmbuffer011165236051.sqa.net(mailfrom:renyu.zj@linux.alibaba.com fp:SMTPD_---0Vlamlc3_1687245167) by smtp.aliyun-inc.com; Tue, 20 Jun 2023 15:12:48 +0800 From: Jing Zhang To: Will Deacon , Mark Rutland , Jonathan Corbet , John Garry , Shuai Xue , Ian Rogers Cc: Robin Murphy , James Clark , Mike Leach , Leo Yan , Ilkka Koskinen , Alexander Shishkin , Jiri Olsa , Namhyung Kim , Adrian Hunter , 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 Subject: [PATCH v4 4/4] docs: perf: Update metric usage for Alibaba's T-Head PMU driver Date: Tue, 20 Jun 2023 15:12:36 +0800 Message-Id: <1687245156-61215-5-git-send-email-renyu.zj@linux.alibaba.com> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1687245156-61215-1-git-send-email-renyu.zj@linux.alibaba.com> References: <1687245156-61215-1-git-send-email-renyu.zj@linux.alibaba.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20230620_001254_341963_925141B5 X-CRM114-Status: UNSURE ( 7.55 ) 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