From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-2.5 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_PASS, URIBL_BLOCKED,USER_AGENT_MUTT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 0B97EC4360F for ; Thu, 4 Apr 2019 11:17:31 +0000 (UTC) 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 mail.kernel.org (Postfix) with ESMTPS id D122B20820 for ; Thu, 4 Apr 2019 11:17:30 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="J0+0MxAx" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org D122B20820 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=arm.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:Cc:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:In-Reply-To:MIME-Version:References: Message-ID:Subject:To:From:Date:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=89Lx4yC+M54Qitnb1ICl28fmWBx6G0Y6Ocz8c6soZfY=; b=J0+0MxAx3PBQ8G b0/nfO/YAe0lVNKGp1hj//nN9VKz7r/vSnfSAawvfx5vahXoq42f3q7+Pn1w3HTqDDekBn7+KxO4x PyEWEzN6v5K2AY3mG1FiFMA/JFne0shyjW+et3/nG+hTc6CWPR4V3qAYFu6QDkBzsV2J3MlktY9N2 QiFfoCs5y2VbgjgKIckz6i6xqgnf+zhoL8jX7+r31Slbk+snSQXU9UBFLQMTvhUry2Y3xR7li+hgp XGatM7HadOHE25XkRDwq47AQu2rNXMhPHKNIeoFzfoH0guNR+0/mGQfP2ApTBrNhnjnOrkGBaukem y3zmilcOy2WERO192row==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.90_1 #2 (Red Hat Linux)) id 1hC0N3-0003lZ-Gh; Thu, 04 Apr 2019 11:17:25 +0000 Received: from usa-sjc-mx-foss1.foss.arm.com ([217.140.101.70] helo=foss.arm.com) by bombadil.infradead.org with esmtp (Exim 4.90_1 #2 (Red Hat Linux)) id 1hC0N1-0003l3-6E for linux-arm-kernel@lists.infradead.org; Thu, 04 Apr 2019 11:17:24 +0000 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.72.51.249]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 8BFFEEBD; Thu, 4 Apr 2019 04:17:22 -0700 (PDT) Received: from fuggles.cambridge.arm.com (usa-sjc-imap-foss1.foss.arm.com [10.72.51.249]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 77A653F557; Thu, 4 Apr 2019 04:17:20 -0700 (PDT) Date: Thu, 4 Apr 2019 12:17:14 +0100 From: Will Deacon To: Frank Li Subject: Re: [PATCH V4 2/4] drivers/perf: imx_ddr: Add ddr performance counter support Message-ID: <20190404111714.GA26392@fuggles.cambridge.arm.com> References: <1550253761-26841-1-git-send-email-Frank.Li@nxp.com> <1550253761-26841-2-git-send-email-Frank.Li@nxp.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <1550253761-26841-2-git-send-email-Frank.Li@nxp.com> User-Agent: Mutt/1.11.1+86 (6f28e57d73f2) () X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190404_041723_230385_2DB64DD7 X-CRM114-Status: GOOD ( 12.20 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: "mark.rutland@arm.com" , Aisheng Dong , "devicetree@vger.kernel.org" , "shawnguo@kernel.org" , "s.hauer@pengutronix.de" , "robh+dt@kernel.org" , dl-linux-imx , "kernel@pengutronix.de" , "lznuaa@gmail.com" , "festevam@gmail.com" , "linux-arm-kernel@lists.infradead.org" Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org Hi Frank, On Fri, Feb 15, 2019 at 06:03:11PM +0000, Frank Li wrote: > Add ddr performance monitor support for iMX8QXP > > There are 4 counters for ddr perfomance events. > counter 0 is dedicated for cycles. > you choose any up to 3 no cycles events. > > for example: > > perf stat -a -e ddr0/read-access/,ddr0/write-access/,ddr0/precharge/ ls > perf stat -a -e ddr0/cycles/,ddr0/read-access/,ddr0/write-access/ ls Could you elaborate a bit on DDR_CAP_AXI_ID, please? Specifically, how does the COUNTER_DPCR1 register work and what happens if I specify two simultaneous events with different values in config1? I'm a little wary of taking raw user input and throwing it straight into a device register! Will _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel