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=-5.9 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_1 autolearn=no 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 BEFA8C07E9B for ; Fri, 9 Jul 2021 10:16:40 +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 6CA4C613D6 for ; Fri, 9 Jul 2021 10:16:40 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 6CA4C613D6 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=armlinux.org.uk Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-nvme-bounces+linux-nvme=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.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:In-Reply-To:MIME-Version:References: Message-ID:Subject:Cc: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=7OEmTjTkE56Ei1SVQyKJqfZNFZcIOKo3Myc3Ted3X00=; b=cFEeoFqlS2uk/A oClsTAOze452wvEkbVsSQyitJBFS4l/x8ovfBXS62QzChYLu0Yu74qH0heSkad7LcC1Si3Sn+oxCF dZCjxbava0oskDXRAZb3w+VDXmBh1twlm68TrVgNzKO1TcuLj+F/XV5estGaZPD0ZruoyOu/VZ9jX z/1nRz3WVg+Z1jEC+8C3w2anpbJVOtES+BB/IFjbhVmpD4lJii32RZ1d/okx4PIDKaLbIwDHuxx3l g2KhBH6bPi3lnSnA9nP0CXuN4myr8bwOR2rp8/3tT5ncrVhPUw9OrFFMRLNuj2iZ00/k5rkm6AAtE AIRevja/CNYqP6wc2V2A==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1m1nYc-001SlN-G4; Fri, 09 Jul 2021 10:16:30 +0000 Received: from pandora.armlinux.org.uk ([2001:4d48:ad52:32c8:5054:ff:fe00:142]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1m1nYR-001Skt-PG; Fri, 09 Jul 2021 10:16:21 +0000 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=armlinux.org.uk; s=pandora-2019; h=Sender:In-Reply-To:Content-Type: MIME-Version:References:Message-ID:Subject:Cc:To:From:Date:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Id: List-Help:List-Unsubscribe:List-Subscribe:List-Post:List-Owner:List-Archive; bh=+5TICEsa94xNlu+MZ0tydmQ+U5vWint8NY+YS0CgtLc=; b=W8AmzrPBw7iJxbKQeZ5eRqIIA 7cNn5zbRxcRp8/Bpt/6v0HIEDFr+LIQ7VSYSqujbtWV3MYYBlNe1KH+XLAKoasU5R03JgGF34bXAU F++yS6EC0aLTznbLp87HXkbuZFt93AnbhiQM3rnqe15JiK6etWyXxBgRz2h7f3ZdINkeS1idhQGUm aH+IMcLZJjB84ps5Elmh/bvEpmrWq+zS4mCCO0jdPynOGIgJbh3wh/2cnqt81+Kck1ELm4nzZnrYx ecZXDEab/e/8+bmdrhljGmC0j4L2Ciiet30zPajs6ytzj48B7VY6dtwP0xrvl7NjpKrfS6JF4cBc9 ur8ckvLGg==; Received: from shell.armlinux.org.uk ([fd8f:7570:feb6:1:5054:ff:fe00:4ec]:45908) by pandora.armlinux.org.uk with esmtpsa (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1m1nYO-0001ii-Ni; Fri, 09 Jul 2021 11:16:16 +0100 Received: from linux by shell.armlinux.org.uk with local (Exim 4.92) (envelope-from ) id 1m1nYM-0004st-Dy; Fri, 09 Jul 2021 11:16:14 +0100 Date: Fri, 9 Jul 2021 11:16:14 +0100 From: "Russell King (Oracle)" To: Ming Lei Cc: linux-nvme@lists.infradead.org, Will Deacon , linux-arm-kernel@lists.infradead.org, iommu@lists.linux-foundation.org, linux-kernel@vger.kernel.org Subject: Re: [bug report] iommu_dma_unmap_sg() is very slow then running IO from remote numa node Message-ID: <20210709101614.GZ22278@shell.armlinux.org.uk> References: MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: 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-20210709_031619_861998_1BFFC4B3 X-CRM114-Status: UNSURE ( 8.13 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-nvme@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "Linux-nvme" Errors-To: linux-nvme-bounces+linux-nvme=archiver.kernel.org@lists.infradead.org On Fri, Jul 09, 2021 at 04:38:09PM +0800, Ming Lei wrote: > I observed that NVMe performance is very bad when running fio on one > CPU(aarch64) in remote numa node compared with the nvme pci numa node. Have you checked the effect of running a memory-heavy process using memory from node 1 while being executed by CPUs in node 0? -- RMK's Patch system: https://www.armlinux.org.uk/developer/patches/ FTTP is here! 40Mbps down 10Mbps up. Decent connectivity at last! _______________________________________________ Linux-nvme mailing list Linux-nvme@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-nvme