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 092CEC433DF for ; Tue, 13 Oct 2020 14:11:16 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id BFE2C247D1 for ; Tue, 13 Oct 2020 14:11:15 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2388311AbgJMOLP (ORCPT ); Tue, 13 Oct 2020 10:11:15 -0400 Received: from out20-99.mail.aliyun.com ([115.124.20.99]:43418 "EHLO out20-99.mail.aliyun.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2388308AbgJMOLP (ORCPT ); Tue, 13 Oct 2020 10:11:15 -0400 X-Alimail-AntiSpam: AC=CONTINUE;BC=0.1553294|-1;CH=green;DM=|CONTINUE|false|;DS=CONTINUE|ham_regular_dialog|0.0274543-0.00126902-0.971277;FP=12781844343017034617|3|2|3|0|-1|-1|-1;HT=ay29a033018047204;MF=wangyugui@e16-tech.com;NM=1;PH=DS;RN=1;RT=1;SR=0;TI=SMTPD_---.Iih1ZlF_1602598270; Received: from 192.168.2.112(mailfrom:wangyugui@e16-tech.com fp:SMTPD_---.Iih1ZlF_1602598270) by smtp.aliyun-inc.com(10.147.44.145); Tue, 13 Oct 2020 22:11:11 +0800 Date: Tue, 13 Oct 2020 22:11:13 +0800 From: Wang Yugui To: linux-xfs@vger.kernel.org Subject: dbench throughput on xfs over hardware limit(6Gb/s) Message-Id: <20201013221113.F0A0.409509F4@e16-tech.com> MIME-Version: 1.0 Content-Type: text/plain; charset="GB2312" 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, dbench throughput on xfs over hardware limit(6Gb/s=750MB/s). Is this a bug or some feature of performance optimization? Disk: TOSHIBA PX05SMQ040 This is a 12Gb/s SAS SSD disk, but connect to 6Gb/s SAS HBA, so it works with 6Gb/s. dbench -s -t 60 -D /xfs 32 #Throughput 884.406 MB/sec (sync open) dbench -s -t 60 -D /xfs 1 #Throughput 149.172 MB/sec (sync open) we test the same disk with ext4 filesystem, the throughput is very close to, but less than the hardware limit. dbench -s -t 60 -D /ext4 32 #Throughput 740.95 MB/sec (sync open) dbench -s -t 60 -D /ext4 1 #Throughput 124.67 MB/sec (sync open) linux kernel: 5.4.70, 5.9.0 Best Regards 王玉贵 2020/10/13 -------------------------------------- 北京京垓科技有限公司 王玉贵 wangyugui@e16-tech.com 电话：+86-136-71123776