X-Recipient: archive-cygwin AT delorie DOT com X-Original-To: cygwin AT cygwin DOT com Delivered-To: cygwin AT cygwin DOT com DMARC-Filter: OpenDMARC Filter v1.4.1 sourceware.org 7DFE53857C66 Authentication-Results: sourceware.org; dmarc=none (p=none dis=none) header.from=emmenlauer.de Authentication-Results: sourceware.org; spf=fail smtp.mailfrom=emmenlauer.de To: Ken Brown , cygwin AT cygwin DOT com References: <41A583E1-C8E7-42AB-9F24-EEC33A41EC60 AT house DOT org> <20210825201845 DOT 07b6400b79dc5558a7761efe AT nifty DOT ne DOT jp> From: Mario Emmenlauer Message-ID: Date: Wed, 25 Aug 2021 22:33:26 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.11.0 MIME-Version: 1.0 In-Reply-To: Content-Language: en-CA X-SA-Exim-Connect-IP: 188.194.28.182 X-SA-Exim-Mail-From: mario AT emmenlauer DOT de X-Spam-Checker-Version: SpamAssassin 3.4.4 (2020-01-24) on server2.sourceware.org X-Spam-Level: X-Spam-Status: No, score=-3.9 required=5.0 tests=BAYES_00, KAM_DMARC_STATUS, NICE_REPLY_A, SPF_HELO_NONE, TXREP, T_SPF_PERMERROR autolearn=ham autolearn_force=no version=3.4.4 Subject: Re: cygrunsrv + sshd + rsync = 20 times too slow -- throttled? X-SA-Exim-Version: 4.2.1 (built Sat, 08 Feb 2020 21:53:50 +0000) X-SA-Exim-Scanned: Yes (on aldebaran.he1ix.org) X-BeenThere: cygwin AT cygwin DOT com X-Mailman-Version: 2.1.29 Precedence: list List-Id: General Cygwin discussions and problem reports List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="utf-8"; Format="flowed" Errors-To: cygwin-bounces+archive-cygwin=delorie DOT com AT cygwin DOT com Sender: "Cygwin" Content-Transfer-Encoding: 8bit X-MIME-Autoconverted: from base64 to 8bit by delorie.com id 17PKZDYS020631 On 25.08.21 19:52, Ken Brown via Cygwin wrote: > A couple years ago I had an idea for changing the pipe implementation to avoid overlapped I/O: > >   https://cygwin.com/pipermail/cygwin-patches/2019q2/009393.html >   https://cygwin.com/pipermail/cygwin-patches/2019q2/009423.html > > I never followed up on it.  But if you think it might help with this problem, I could dust it off and try to finish it. This sounds quite interesting! Do I assume correctly that these changes may likely lead to a general improvement also in other situations if the impact of the pipe is so big for this specific case? Pipes are most likely used in quite a lot of scenarios?! All the best, Mario Emmenlauer -- Problem reports: https://cygwin.com/problems.html FAQ: https://cygwin.com/faq/ Documentation: https://cygwin.com/docs.html Unsubscribe info: https://cygwin.com/ml/#unsubscribe-simple