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=-9.5 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE, SPF_PASS,URIBL_BLOCKED,USER_AGENT_SANE_1 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 7CD5EC433E2 for ; Fri, 28 Aug 2020 10:30:47 +0000 (UTC) Received: from merlin.infradead.org (merlin.infradead.org [205.233.59.134]) (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 35AB42086A for ; Fri, 28 Aug 2020 10:30:47 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="QXiXc8GX"; dkim=fail reason="signature verification failed" (1024-bit key) header.d=kernel.org header.i=@kernel.org header.b="zUNtDENk" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 35AB42086A Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=kernel.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+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=merlin.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=VEHZBaBmQaFX/eNzz9VjUD+cTR81dWr5/dVIoIYxYaQ=; b=QXiXc8GXWHqKMXyyUFIzcwQ98 KJJoH/i8ZoxMPRTekcV49lA3xRN6uN3MwoJ4l+8qAnOEQH54BUq+TZT3KAXsbUfcScPZWYKPWqdlW vXSxul4Ro5hazugSmKDqNkeAROgFFdkqrUlk+wPPZC7gFDqwjkqI0dGSASI2c2CafKsoOg7DSJELO SmljGOmkbOVD3178exeKYyqJcBymzNWColS28LolAFozLHRPL6gq7iPOkpkcK8MHBGSI00KazhvVM x32jh/EWpj9S4Ixh3b66XM474hNL6b80ENQ1V/J4kWSriUFGg4utC+qmQNvzdP9cKf3/TgBysxZ0X ypFBZV9Rg==; Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1kBbdY-0006X8-GH; Fri, 28 Aug 2020 10:29:36 +0000 Received: from mail.kernel.org ([198.145.29.99]) by merlin.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1kBbdV-0006WM-RT for linux-arm-kernel@lists.infradead.org; Fri, 28 Aug 2020 10:29:34 +0000 Received: from willie-the-truck (236.31.169.217.in-addr.arpa [217.169.31.236]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 11BCE2080C; Fri, 28 Aug 2020 10:29:30 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1598610572; bh=OM0xDviExPMs25X2djcfNEdWDnV1PejufaV7fIDxStc=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=zUNtDENk4ICQ8nLWM16O2yclgqOzaKohnholRoFV5bpNLhnMucSqN7r68fxxZUXi0 OJxHoK0mbSbxdpsVucJwPxRYKdUF/AaeMFVMkedUbEoFfz0Y8/5CgGchloDeiuGSrX Ryqe/7AuLbZdxTKaD+gXilydDho1fJi+m9JeTzaU= Date: Fri, 28 Aug 2020 11:29:27 +0100 From: Will Deacon To: Barry Song Subject: Re: [PATCH] iommu/arm-smmu-v3: add tracepoints for cmdq_issue_cmdlist Message-ID: <20200828102927.GA30391@willie-the-truck> References: <20200827093351.15244-1-song.bao.hua@hisilicon.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20200827093351.15244-1-song.bao.hua@hisilicon.com> User-Agent: Mutt/1.10.1 (2018-07-13) X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200828_062933_979386_14AA826B X-CRM114-Status: GOOD ( 12.21 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: iommu@lists.linux-foundation.org, robin.murphy@arm.com, joro@8bytes.org, linux-arm-kernel@lists.infradead.org, linuxarm@huawei.com Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Thu, Aug 27, 2020 at 09:33:51PM +1200, Barry Song wrote: > cmdq_issue_cmdlist() is the hotspot that uses a lot of time. This patch > adds tracepoints for it to help debug. > > Signed-off-by: Barry Song > --- > * can furthermore develop an eBPF program to benchmark using this trace Hmm, don't these things have a history of becoming ABI? If so, I don't really want them in the driver at all, sorry. Do other drivers overcome this somehow? Will _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel