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=-2.3 required=3.0 tests=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 C0063C2D0C8 for ; Tue, 17 Dec 2019 09:43:08 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 95B7820716 for ; Tue, 17 Dec 2019 09:43:08 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726959AbfLQJnH (ORCPT ); Tue, 17 Dec 2019 04:43:07 -0500 Received: from 8bytes.org ([81.169.241.247]:57632 "EHLO theia.8bytes.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725870AbfLQJnG (ORCPT ); Tue, 17 Dec 2019 04:43:06 -0500 Received: by theia.8bytes.org (Postfix, from userid 1000) id 921C4286; Tue, 17 Dec 2019 10:43:05 +0100 (CET) Date: Tue, 17 Dec 2019 10:43:04 +0100 From: Joerg Roedel To: Cong Wang Cc: iommu@lists.linux-foundation.org, linux-kernel@vger.kernel.org, Robin Murphy Subject: Re: [Patch v2 0/3] iommu: reduce spinlock contention on fast path Message-ID: <20191217094304.GF8689@8bytes.org> References: <20191129004855.18506-1-xiyou.wangcong@gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20191129004855.18506-1-xiyou.wangcong@gmail.com> User-Agent: Mutt/1.10.1 (2018-07-13) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, Nov 28, 2019 at 04:48:52PM -0800, Cong Wang wrote: > This patchset contains three small optimizations for the global spinlock > contention in IOVA cache. Our memcache perf test shows this reduced its > p999 latency down by 45% on AMD when IOMMU is enabled. Sounds nice. Can you please re-send with Robin Murphy on Cc? Robin, can you have a look at these IOVA changes please? Thanks, Joerg 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=-2.3 required=3.0 tests=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 2984FC2D0C5 for ; Tue, 17 Dec 2019 09:43:11 +0000 (UTC) Received: from silver.osuosl.org (smtp3.osuosl.org [140.211.166.136]) (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 E18E020716 for ; Tue, 17 Dec 2019 09:43:10 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org E18E020716 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=8bytes.org Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=iommu-bounces@lists.linux-foundation.org Received: from localhost (localhost [127.0.0.1]) by silver.osuosl.org (Postfix) with ESMTP id BA010204C9; Tue, 17 Dec 2019 09:43:10 +0000 (UTC) X-Virus-Scanned: amavisd-new at osuosl.org Received: from silver.osuosl.org ([127.0.0.1]) by localhost (.osuosl.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 9tdANam2WEjd; Tue, 17 Dec 2019 09:43:09 +0000 (UTC) Received: from lists.linuxfoundation.org (lf-lists.osuosl.org [140.211.9.56]) by silver.osuosl.org (Postfix) with ESMTP id 88C1E20481; Tue, 17 Dec 2019 09:43:09 +0000 (UTC) Received: from lf-lists.osuosl.org (localhost [127.0.0.1]) by lists.linuxfoundation.org (Postfix) with ESMTP id 79158C1D7D; Tue, 17 Dec 2019 09:43:09 +0000 (UTC) Received: from silver.osuosl.org (smtp3.osuosl.org [140.211.166.136]) by lists.linuxfoundation.org (Postfix) with ESMTP id 07594C077D for ; Tue, 17 Dec 2019 09:43:08 +0000 (UTC) Received: from localhost (localhost [127.0.0.1]) by silver.osuosl.org (Postfix) with ESMTP id E13CA204C9 for ; Tue, 17 Dec 2019 09:43:07 +0000 (UTC) X-Virus-Scanned: amavisd-new at osuosl.org Received: from silver.osuosl.org ([127.0.0.1]) by localhost (.osuosl.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 2YgW4oI2VduR for ; Tue, 17 Dec 2019 09:43:07 +0000 (UTC) X-Greylist: from auto-whitelisted by SQLgrey-1.7.6 Received: from theia.8bytes.org (8bytes.org [81.169.241.247]) by silver.osuosl.org (Postfix) with ESMTPS id 4A8AD20481 for ; Tue, 17 Dec 2019 09:43:07 +0000 (UTC) Received: by theia.8bytes.org (Postfix, from userid 1000) id 921C4286; Tue, 17 Dec 2019 10:43:05 +0100 (CET) Date: Tue, 17 Dec 2019 10:43:04 +0100 From: Joerg Roedel To: Cong Wang Subject: Re: [Patch v2 0/3] iommu: reduce spinlock contention on fast path Message-ID: <20191217094304.GF8689@8bytes.org> References: <20191129004855.18506-1-xiyou.wangcong@gmail.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20191129004855.18506-1-xiyou.wangcong@gmail.com> User-Agent: Mutt/1.10.1 (2018-07-13) Cc: iommu@lists.linux-foundation.org, Robin Murphy , linux-kernel@vger.kernel.org X-BeenThere: iommu@lists.linux-foundation.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Development issues for Linux IOMMU support List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: iommu-bounces@lists.linux-foundation.org Sender: "iommu" On Thu, Nov 28, 2019 at 04:48:52PM -0800, Cong Wang wrote: > This patchset contains three small optimizations for the global spinlock > contention in IOVA cache. Our memcache perf test shows this reduced its > p999 latency down by 45% on AMD when IOMMU is enabled. Sounds nice. Can you please re-send with Robin Murphy on Cc? Robin, can you have a look at these IOVA changes please? Thanks, Joerg _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu