From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from NAM10-MW2-obe.outbound.protection.outlook.com (mail-mw2nam10on2135.outbound.protection.outlook.com [40.107.94.135]) by sourceware.org (Postfix) with ESMTPS id 48ECC385841C for ; Fri, 27 Aug 2021 16:00:54 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.4.1 sourceware.org 48ECC385841C ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=c+zCeRtEvARFZlqRYCo5pJtnBLAc08qJjLMfdUCmqWkwIlY5TQKEasbMm59td3ZIIZ7KNexeNAjwOi3TkiYmsrMoch/E++n8mhLXYayXK2+OMCw6eugYg/P5BaAogt6fM2i7QTi9R/Qeld0e+9ehrAFEW+Jfj+MFePv+4u9SsT7ioVazaZzwVzrixENf7zJoqIDW8kq9wAYYJN6W28pyX2e41Z52lnNJh3f182c2tXFJtOMza60Oyv8nTzK+DwLBNTp1MoKb/j62xDqjPVho1AeVQA7pWCoizw6czxDlT/4XkzAPZKhTDUPNUqo94uxw8PDLZgiqd2wZTTzPMhFiIg== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=microsoft.com; s=arcselector9901; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=eF+4mi8BIIIiElyR5KYwrZABwMCQqwTKjKhrONLSBoA=; b=AmnliRP+lPTmpna3nfSpcAGPCN6Sx+Tw/jrRRGjTQXfZXcZpLhKsVV0m4Cb1bFNwetxcJklXwJ1UJSdPxFXBLIB5cSa5aU0wrswmq9clGxckNeFe2hxbrWxUQN6lCrxP5pl9XvbvCG4hhx7PARUJaYXHfBH9eqlj3pjWRU7yj6gX3tWxmuef/vkaxnn+FOPDlvYtYnvYXWAq+5KL/JD8BrYfZXuje3ykfp/yc2yBwQBypn+eBjDh3LXLTyDssoqulAPZht4J4LZ9ZrVskisUB6/CLfRpsZLrelFtWpAG8KSus8QfPcCGwECUfnpvKXsYi4bx5Lm5DQFSU/6JDIxyRg== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass smtp.mailfrom=cornell.edu; dmarc=pass action=none header.from=cornell.edu; dkim=pass header.d=cornell.edu; arc=none Received: from BN7PR04MB4388.namprd04.prod.outlook.com (2603:10b6:406:f8::19) by BN8PR04MB5617.namprd04.prod.outlook.com (2603:10b6:408:73::12) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.4436.22; Fri, 27 Aug 2021 16:00:51 +0000 Received: from BN7PR04MB4388.namprd04.prod.outlook.com ([fe80::38bd:b608:234f:9ec6]) by BN7PR04MB4388.namprd04.prod.outlook.com ([fe80::38bd:b608:234f:9ec6%7]) with mapi id 15.20.4457.023; Fri, 27 Aug 2021 16:00:51 +0000 Subject: Re: cygrunsrv + sshd + rsync = 20 times too slow -- throttled? To: Takashi Yano , cygwin@cygwin.com References: <41A583E1-C8E7-42AB-9F24-EEC33A41EC60@house.org> <20210825201845.07b6400b79dc5558a7761efe@nifty.ne.jp> <20210826062934.54f2f2216021c095bb7ba13b@nifty.ne.jp> <3b560051-ab27-f392-ca4b-d1fd9b5733b0@cornell.edu> <20210827202440.47706fc2fc07c5e9a1bc0047@nifty.ne.jp> From: Ken Brown Message-ID: <4f2cb5f3-ce9c-c617-f65f-841a5eca096e@cornell.edu> Date: Fri, 27 Aug 2021 12:00:50 -0400 User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:78.0) Gecko/20100101 Thunderbird/78.13.0 In-Reply-To: <20210827202440.47706fc2fc07c5e9a1bc0047@nifty.ne.jp> Content-Type: text/plain; charset=windows-1252; format=flowed Content-Language: en-US Content-Transfer-Encoding: 7bit X-ClientProxiedBy: CH0PR03CA0037.namprd03.prod.outlook.com (2603:10b6:610:b3::12) To BN7PR04MB4388.namprd04.prod.outlook.com (2603:10b6:406:f8::19) MIME-Version: 1.0 X-MS-Exchange-MessageSentRepresentingType: 1 Received: from [192.168.1.211] (74.69.128.111) by CH0PR03CA0037.namprd03.prod.outlook.com (2603:10b6:610:b3::12) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.4457.21 via Frontend Transport; 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I tested topic/pipe branch. > > [yano@cygwin-PC ~]$ scp test.dat yano@linux-server:. > yano@linux-server's password: > test.dat 100% 100MB 95.9MB/s 00:01 > [yano@cygwin-PC ~]$ scp yano@linux-server:test.dat . > yano@linux-server's password: > test.dat 100% 100MB 8.0MB/s 00:12 > > yano@linux-server:~$ scp yano@cygwin-PC:test.dat . > yano@cygwin-PC's password: > test.dat 100% 100MB 109.7MB/s 00:00 > yano@linux-server:~$ scp test.dat yano@cygwin-PC:. > yano@cygwin-PC's password: > test.dat 100% 100MB 31.4MB/s 00:03 > > As shown above, outgoing transfer-rate has been improved upto near > theoretical limit. However, incoming transfer-rate is not improved > much. > > I digged further and found the first patch attached solves the issue > as follows. > > [yano@cygwin-PC ~]$ scp yano@linux-server:test.dat . > yano@linux-server's password: > test.dat 100% 100MB 112.8MB/s 00:00 > > yano@linux-server2:~$ scp test.dat yano@cygwin-PC:. > yano@cygwin-PC's password: > test.dat 100% 100MB 102.5MB/s 00:00 Great! > I also tested the case: >>>> https://cygwin.com/pipermail/cygwin/2021-March/247987.html >>>> which seems to be the same issue with >>>> https://stackoverflow.com/questions/10385424/good-alternatives-to-cygwin-cygwin-doesnt-support-natively-support-win32-app > > Unfortunately, topic/pipe does not help. > > I confirmed that applying the second patch attached, which reverts > to create() rather than nt_create(), and setting CYGWIN=pipe_byte > fixes the problem. > > What do you think of this alternative implementation which does > not use nt_create()? Two years ago I thought I needed nt_create to avoid problems when calling set_pipe_non_blocking. Are you saying that's not an issue? Is set_pipe_non_blocking unnecessary? Is that the point of your modification to raw_read? Ken