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=-3.7 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, UNPARSEABLE_RELAY,URIBL_BLOCKED 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 B00FAC433E7 for ; Wed, 14 Oct 2020 22:43:40 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 6A4FD2223F for ; Wed, 14 Oct 2020 22:43:40 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727714AbgJNWnj convert rfc822-to-8bit (ORCPT ); Wed, 14 Oct 2020 18:43:39 -0400 Received: from out20-109.mail.aliyun.com ([115.124.20.109]:36168 "EHLO out20-109.mail.aliyun.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727387AbgJNWnj (ORCPT ); Wed, 14 Oct 2020 18:43:39 -0400 X-Alimail-AntiSpam: AC=CONTINUE;BC=0.08754819|-1;CH=green;DM=|CONTINUE|false|;DS=CONTINUE|ham_news_journal|0.2243-0.00424564-0.771454;FP=0|0|0|0|0|-1|-1|-1;HT=ay29a033018047187;MF=wangyugui@e16-tech.com;NM=1;PH=DS;RN=2;RT=2;SR=0;TI=SMTPD_---.IjLxN2I_1602715416; Received: from 192.168.2.112(mailfrom:wangyugui@e16-tech.com fp:SMTPD_---.IjLxN2I_1602715416) by smtp.aliyun-inc.com(10.147.42.22); Thu, 15 Oct 2020 06:43:36 +0800 Date: Thu, 15 Oct 2020 06:43:40 +0800 From: Wang Yugui To: Dave Chinner Subject: Re: dbench throughput on xfs over hardware limit(6Gb/s) Cc: linux-xfs@vger.kernel.org In-Reply-To: <20201014212458.GC7391@dread.disaster.area> References: <20201014113211.2372.409509F4@e16-tech.com> <20201014212458.GC7391@dread.disaster.area> Message-Id: <20201015064339.35D4.409509F4@e16-tech.com> MIME-Version: 1.0 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 8BIT X-Mailer: Becky! ver. 2.75.01 [en] Precedence: bulk List-ID: X-Mailing-List: linux-xfs@vger.kernel.org Hi, > Reads can still be served from the page cache without doing physical > IO. You are right. for ext4, with more clients(32->80), the Throughput of ext4 is over 6Gb/s too. the 'Throughput' of dbench include not only 'write', but also include 'read' in dbench too. And 'max_latency' include not only 'write', but also include others too. 1)dbench result example1 WriteX 365460 4.474 2279.808 ... Throughput 385.697 MB/sec (sync open) 32 clients 32 procs max_latency=2279.818 ms 2)dbench result example2 WriteX 741543 3.521 16.380 ... Throughput 779.972 MB/sec (sync open) 48 clients 48 procs max_latency=11.246 ms Thanks a lot. Best Regards Wang Yugui (wangyugui@e16-tech.com) 2020/10/15