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 Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 54BB8C7618D for ; Thu, 6 Apr 2023 11:22:04 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1pkNg1-0004hL-7l; Thu, 06 Apr 2023 07:21:14 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1pkNfw-0004gp-Jy for qemu-devel@nongnu.org; Thu, 06 Apr 2023 07:21:09 -0400 Received: from chamillionaire.breakpoint.cc ([2a0a:51c0:0:237:300::1]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1pkNfu-0007wb-6E for qemu-devel@nongnu.org; Thu, 06 Apr 2023 07:21:08 -0400 Received: from fw by Chamillionaire.breakpoint.cc with local (Exim 4.92) (envelope-from ) id 1pkNfl-0007J1-JS; Thu, 06 Apr 2023 13:20:57 +0200 Date: Thu, 6 Apr 2023 13:20:57 +0200 From: Florian Westphal To: =?iso-8859-15?B?THVr4ag=?= Doktor Cc: qemu-devel , Florian Westphal , Eric Blake , Kevin Wolf Subject: Re: qemu-nbd performance regression in bd2cd4a4 Message-ID: <20230406112057.GA22728@breakpoint.cc> References: <3ffec0e7-7a4e-f31f-9a80-43eff755d72b@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-15 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <3ffec0e7-7a4e-f31f-9a80-43eff755d72b@redhat.com> User-Agent: Mutt/1.10.1 (2018-07-13) Received-SPF: pass client-ip=2a0a:51c0:0:237:300::1; envelope-from=fw@strlen.de; helo=Chamillionaire.breakpoint.cc X-Spam_score_int: -41 X-Spam_score: -4.2 X-Spam_bar: ---- X-Spam_report: (-4.2 / 5.0 requ) BAYES_00=-1.9, RCVD_IN_DNSWL_MED=-2.3, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org LukᨠDoktor wrote: > Fio job (executed via pbench, let me know if you need simplified steps with fio only): That would be useful, thanks. I suspect revert is useless because upcoming TCP_NODELAY change will increase small packet rate too.