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 43675C4360F for ; Fri, 5 Apr 2019 14:39:24 +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 152A021855 for ; Fri, 5 Apr 2019 14:39:24 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="nfnlsoGu" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 152A021855 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=4SHMaVHYrNPpOoXvL5Zgzca6sJzWsxyPjKrObPeq89Q=; b=nfnlsoGuKIo7tF /SBWuog8rQGesTfYxovLgFolaWN17fEG7+jY6rrM7d8uyVrjeA6ynnsA+XgVWCRgBEZxIpPNc++jv lqdapogEWCR3Z7SPg2UAexLxmZPEr7EFFvSE/W+mVGVwYTa+jUWGlMZwW0WyTSOVlzcznUceRVSNh JLVm/KWGIWmyxluD/Hk1egV9TqU5cgSxpn/ZRTErG0pKY+mBuL9DRBa8toz3/o1Q11aubW1I2cTg+ awQVvyKVkb9DJcPt5JCyUssfjvuntWw4rToFwc3GD6pHbKK3LMNopku1Hgfvpca+znz760FyB+CL/ Zdc0q3gNRQXRs7/+6ISw==; 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 1hCPzx-0008BN-4S; Fri, 05 Apr 2019 14:39:17 +0000 Received: from foss.arm.com ([217.140.101.70]) by bombadil.infradead.org with esmtp (Exim 4.90_1 #2 (Red Hat Linux)) id 1hCPzY-0007fq-2X for linux-arm-kernel@lists.infradead.org; Fri, 05 Apr 2019 14:38:56 +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 7D58D16A3; Fri, 5 Apr 2019 07:38:51 -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 67C2E3F68F; Fri, 5 Apr 2019 07:38:49 -0700 (PDT) Date: Fri, 5 Apr 2019 15:38:46 +0100 From: Will Deacon To: Zhi Li Subject: Re: [PATCH V4 2/4] drivers/perf: imx_ddr: Add ddr performance counter support Message-ID: <20190405143846.GB7313@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> <20190404111714.GA26392@fuggles.cambridge.arm.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.11.1+86 (6f28e57d73f2) () X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190405_073852_569533_E9405741 X-CRM114-Status: GOOD ( 14.46 ) 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" , "festevam@gmail.com" , "s.hauer@pengutronix.de" , Frank Li , "robh+dt@kernel.org" , dl-linux-imx , "kernel@pengutronix.de" , "shawnguo@kernel.org" , "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 On Fri, Apr 05, 2019 at 09:34:38AM -0500, Zhi Li wrote: > On Thu, Apr 4, 2019 at 6:17 AM Will Deacon wrote: > > > > 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! > > I have not find better method to do that. > bit 0-15: AXIID > bit 16-31: AXID_MASK > > Check condition AxID && AXI_MASKING == AXI_ID && AXI_MASKING Hmm, that doesn't really answer my second question :( What happens if I specify two simultaneous events with different values in config1? Will _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel