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content-type:date:from:message-id:mime-version:reply-to:subject: to; b=CI058R4IbxG7fzCkqLG0Esf2gJmXMjCXGWsNrHqqE9SUWVGfk5el+7kPbsgtQI0+ 4k4BQBB0iFBUuj8ySSnCppbm4hh+RwSk5W59xGxIyBU+ZUVTZzzyJ3vx+0FbB38b2 UmO+Jen59GFqjNkY4AdA9FWADHjCOtTg/wlrtq2tJQ8JjLup27eQ0PyUJZXW58Gp6 UM1eRlY3eDEopIhXmAkY0ulbf80tzwW4xt3zjALUaGzadi8cv79vjztdokyix0aA2 M/LqmE/mN2nX3GCkDbOKY2JivETKb+tPZu8autX7Dhi4xYnBovPGBswf5Bqv50+xk WtJvR8LEjonuji3H+w== X-UI-Sender-Class: 724b4f7f-cbec-4199-ad4e-598c01a50d3a Received: from gandalf.gmx.de ([185.89.37.61]) by mail.gmx.net (mrgmx005 [212.227.17.190]) with ESMTPSA (Nemesis) id 1N5mGH-1v1gfB0FRr-0148HY; Thu, 22 May 2025 13:22:26 +0200 From: Michael Albinus <michael.albinus@HIDDEN> To: Daniel Colascione <dancol@HIDDEN> Subject: Re: bug#78499: tramp-accept-process-output busy-waits In-Reply-To: <B4EA7C51-2E6E-4D3E-A9A1-7F50C0E7ACD0@HIDDEN> References: <m1tt5gqnwz.fsf@HIDDEN> <874ixepfr1.fsf@HIDDEN> <B4EA7C51-2E6E-4D3E-A9A1-7F50C0E7ACD0@HIDDEN> Date: Thu, 22 May 2025 13:22:24 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List-Id: <debbugs-submit.debbugs.gnu.org> List-Unsubscribe: <https://debbugs.gnu.org/cgi-bin/mailman/options/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=unsubscribe> List-Archive: <https://debbugs.gnu.org/cgi-bin/mailman/private/debbugs-submit/> List-Post: <mailto:debbugs-submit <at> debbugs.gnu.org> List-Help: <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=help> List-Subscribe: <https://debbugs.gnu.org/cgi-bin/mailman/listinfo/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=subscribe> Errors-To: debbugs-submit-bounces <at> debbugs.gnu.org Sender: "Debbugs-submit" <debbugs-submit-bounces <at> debbugs.gnu.org> X-Spam-Score: -1.7 (-) Daniel Colascione <dancol@HIDDEN> writes: Hi Daniel, >>tramp-accept-process-output has seen several implementation iterations >>ove the years. I'm happy, that it looks stable now. >> >>Could you please show a problem with the current implementation, which >>needs to be fixed? > . > 100% CPU use while we're waiting to receive bytes from the peer is a > priori a problem that needs to be fixed. Good software doesn't busy > wait. We have a perfectly good mechanism for waiting for something to > happen with timeouts and we shouldn't avoid them on account of years > of accumulated changes or compatibility with ancient and irrelevant > bugs. "A priori" isn't a bug recipe. Pls show me a recipe indicating a misbehavior, which needs to be fixed. Best regards, Michael.
bug-gnu-emacs@HIDDEN:bug#78499; Package emacs.
Full text available.Received: (at 78499) by debbugs.gnu.org; 22 May 2025 07:43:30 +0000 From debbugs-submit-bounces <at> debbugs.gnu.org Thu May 22 03:43:29 2025 Received: from localhost ([127.0.0.1]:59395 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <debbugs-submit-bounces <at> debbugs.gnu.org>) id 1uI0aP-0002p3-FL for submit <at> debbugs.gnu.org; Thu, 22 May 2025 03:43:29 -0400 Received: from dancol.org ([2600:3c01:e000:3d8::1]:42204) by debbugs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.84_2) (envelope-from <dancol@HIDDEN>) id 1uI0aM-0002ot-EH for 78499 <at> debbugs.gnu.org; Thu, 22 May 2025 03:43:27 -0400 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=dancol.org; s=x; h=Content-Transfer-Encoding:Content-Type:MIME-Version:Message-ID: References:In-Reply-To:Subject:CC:To:From:Date:Sender:Reply-To:Content-ID: Content-Description:Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc :Resent-Message-ID:List-Id:List-Help:List-Unsubscribe:List-Subscribe: List-Post:List-Owner:List-Archive; bh=gISQeCj3UAChzFN96xcB7umJUF5+Ry4xp+VEPIH7ZEY=; b=oDH5zXucVN+GYwVmQDkGPoTV+4 q5nrruis4/GE5Ftehp5F8zRZ2jjHLxfzcQ8K8Uuo/xU5N+yEtrTYoyyquI1rL3uJjW6N161zK+SAj tH4nLKqb3//GNeD8LRBH3AncQCCOhSygslTqv0Le9/jTL48gsuGEKHdJnRLt8SuPWCd5jKPRsjh9x d3XlWMzGJx8PbP3uwQUIc7yroPk/eVc3YVeBC6gFHSwVtrVXNR2UOSzrSyhBtKOUGdeTYITb0/Zgx b6JcZYlOKMPk0Q9BAOqvhFBw91M21yV/cy1UcdGxZyOvTUG4WZIQymXf89B52iqIUI9jHvV2XpdhJ avFmredQ==; Received: from 2603-9001-4203-1ab2-a4db-cc40-dc15-f259.inf6.spectrum.com ([2603:9001:4203:1ab2:a4db:cc40:dc15:f259]:54814 helo=[IPv6:::1]) by dancol.org with esmtpsa (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256 (Exim 4.96) (envelope-from <dancol@HIDDEN>) id 1uI0ZH-00AE8N-1n; Thu, 22 May 2025 03:42:19 -0400 Date: Thu, 22 May 2025 03:43:24 -0400 From: Daniel Colascione <dancol@HIDDEN> To: Michael Albinus <michael.albinus@HIDDEN> Subject: Re: bug#78499: tramp-accept-process-output busy-waits User-Agent: K-9 Mail for Android In-Reply-To: <874ixepfr1.fsf@HIDDEN> References: <m1tt5gqnwz.fsf@HIDDEN> <874ixepfr1.fsf@HIDDEN> Message-ID: <B4EA7C51-2E6E-4D3E-A9A1-7F50C0E7ACD0@HIDDEN> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable X-Spam-Score: -0.0 (/) X-Debbugs-Envelope-To: 78499 Cc: 78499 <at> debbugs.gnu.org X-BeenThere: debbugs-submit <at> debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: <debbugs-submit.debbugs.gnu.org> List-Unsubscribe: <https://debbugs.gnu.org/cgi-bin/mailman/options/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=unsubscribe> List-Archive: <https://debbugs.gnu.org/cgi-bin/mailman/private/debbugs-submit/> List-Post: <mailto:debbugs-submit <at> debbugs.gnu.org> List-Help: <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=help> List-Subscribe: <https://debbugs.gnu.org/cgi-bin/mailman/listinfo/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=subscribe> Errors-To: debbugs-submit-bounces <at> debbugs.gnu.org Sender: "Debbugs-submit" <debbugs-submit-bounces <at> debbugs.gnu.org> X-Spam-Score: -1.0 (-) On May 21, 2025 3:47:14 AM EDT, Michael Albinus <michael=2Ealbinus@gmx=2Ed= e> wrote: >Daniel Colascione <dancol@dancol=2Eorg> writes: > >Hi Daniel, > >> tramp-accept-process-output should wait for something to actually happe= n >> to the process from which we're trying to accept output, not just retur= n >> immediately after specifying a zero timeout and rely on the caller >> to poll=2E > >tramp-accept-process-output has seen several implementation iterations >ove the years=2E I'm happy, that it looks stable now=2E > >Could you please show a problem with the current implementation, which >needs to be fixed? =2E 100% CPU use while we're waiting to receive bytes from the peer is a prior= i a problem that needs to be fixed=2E Good software doesn't busy wait=2E We= have a perfectly good mechanism for waiting for something to happen with t= imeouts and we shouldn't avoid them on account of years of accumulated chan= ges or compatibility with ancient and irrelevant bugs=2E=20
bug-gnu-emacs@HIDDEN:bug#78499; Package emacs.
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content-type:date:from:message-id:mime-version:reply-to:subject: to; b=f6v9reqtYgjOM/R0DbmtPe7S3z2cIcPySm5ZjimypCNTbWI8NCFQSvnPiBWXdqwX S98XpRpCKmgo9zM1AiQNi03kEAvfrrzmIK8tjdRgavd/M0wlCO1TdO8baJ68NsMxU b+lZ/zfITApcpIbWMnXfHZKYWTNDYckNWROXRNhbvscv2wTmU+rs9VsSesjWgsj7x vpI5wqpvAzsTyN4D47CklvW1j5XNajwR3wfP4Wwx758islc0y6sQuIFjzIqyw1kDZ ZJcHkicmu3jiZG7YQ9gNbb542aCxzdtyAmB8jjTgYJnju4uVl4PYzdTmbQSMhRDNs 2l6dDM6rRuc4tPlz2w== X-UI-Sender-Class: 724b4f7f-cbec-4199-ad4e-598c01a50d3a Received: from gandalf.gmx.de ([185.89.37.61]) by mail.gmx.net (mrgmx105 [212.227.17.168]) with ESMTPSA (Nemesis) id 1MXp9Y-1uRfgW0beu-00NGDy; Wed, 21 May 2025 09:47:16 +0200 From: Michael Albinus <michael.albinus@HIDDEN> To: Daniel Colascione <dancol@HIDDEN> Subject: Re: bug#78499: tramp-accept-process-output busy-waits In-Reply-To: <m1tt5gqnwz.fsf@HIDDEN> References: <m1tt5gqnwz.fsf@HIDDEN> Date: Wed, 21 May 2025 09:47:14 +0200 Message-ID: <874ixepfr1.fsf@HIDDEN> User-Agent: Gnus/5.13 (Gnus v5.13) MIME-Version: 1.0 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<https://debbugs.gnu.org/cgi-bin/mailman/options/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=unsubscribe> List-Archive: <https://debbugs.gnu.org/cgi-bin/mailman/private/debbugs-submit/> List-Post: <mailto:debbugs-submit <at> debbugs.gnu.org> List-Help: <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=help> List-Subscribe: <https://debbugs.gnu.org/cgi-bin/mailman/listinfo/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=subscribe> Errors-To: debbugs-submit-bounces <at> debbugs.gnu.org Sender: "Debbugs-submit" <debbugs-submit-bounces <at> debbugs.gnu.org> X-Spam-Score: -1.7 (-) Daniel Colascione <dancol@HIDDEN> writes: Hi Daniel, > tramp-accept-process-output should wait for something to actually happen > to the process from which we're trying to accept output, not just return > immediately after specifying a zero timeout and rely on the caller > to poll. tramp-accept-process-output has seen several implementation iterations ove the years. I'm happy, that it looks stable now. Could you please show a problem with the current implementation, which needs to be fixed? Best regards, Michael.
bug-gnu-emacs@HIDDEN:bug#78499; Package emacs.
Full text available.Received: (at submit) by debbugs.gnu.org; 19 May 2025 21:41:15 +0000 From debbugs-submit-bounces <at> debbugs.gnu.org Mon May 19 17:41:15 2025 Received: from localhost ([127.0.0.1]:46537 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <debbugs-submit-bounces <at> debbugs.gnu.org>) id 1uH8EV-0007vz-Gq for submit <at> debbugs.gnu.org; Mon, 19 May 2025 17:41:15 -0400 Received: from lists.gnu.org ([2001:470:142::17]:43082) by debbugs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.84_2) (envelope-from <dancol@HIDDEN>) id 1uH8ET-0007vD-2J for submit <at> debbugs.gnu.org; Mon, 19 May 2025 17:41:13 -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 <dancol@HIDDEN>) id 1uH8EN-0003aV-1R for bug-gnu-emacs@HIDDEN; Mon, 19 May 2025 17:41:07 -0400 Received: from dancol.org ([2600:3c01:e000:3d8::1]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from <dancol@HIDDEN>) id 1uH8EJ-0007mV-G9 for bug-gnu-emacs@HIDDEN; Mon, 19 May 2025 17:41:06 -0400 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=dancol.org; s=x; h=Content-Type:MIME-Version:Message-ID:Date:Subject:To:From:Sender: Reply-To:Cc:Content-Transfer-Encoding:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: In-Reply-To:References:List-Id:List-Help:List-Unsubscribe:List-Subscribe: List-Post:List-Owner:List-Archive; bh=t6rleTB4/sx1GH19+GUQNqM7X4Xs4AXw0p9g9A60xM0=; b=DiBWQ2qXSgQcyickPf3H14edmS G4/r8UAyoAqzwBT7I4V9wvxOXqXftHl5cQF4OpWicta/VW7I5BBC2HsVGcao3Vg+2Gs+hfP/BZfXt d+VxuYnks/sIgTbHoVw2kzwyWnQm3d5kanmH6jDS6TqlTvqYePgoMCDenSubtjxSxLBkfGrRVYuvZ iS3v3ge/FiOZPbMT7FA1ZaS/Xj0GNNNfg0uaynCJ1X5eaIM7q7pBUnJi+mmP/Y8cX+a55xTq2ON7X tumv09/4R+AC2FXrLqSiH23wgSforJSnz+Ft5LtaowfGC62txvaPn3Lva19/Km1ELuGiFCXml76KU l8NvC27w==; Received: from dancol by dancol.org with local (Exim 4.96) (envelope-from <dancol@HIDDEN>) id 1uH8DF-00A4VE-2N for bug-gnu-emacs@HIDDEN; Mon, 19 May 2025 17:39:57 -0400 From: Daniel Colascione <dancol@HIDDEN> To: bug-gnu-emacs@HIDDEN Subject: tramp-accept-process-output busy-waits User-Agent: mu4e 1.12.10; emacs 31.0.50 Date: Mon, 19 May 2025 17:41:00 -0400 Message-ID: <m1tt5gqnwz.fsf@HIDDEN> MIME-Version: 1.0 Content-Type: text/plain Received-SPF: pass client-ip=2600:3c01:e000:3d8::1; envelope-from=dancol@HIDDEN; helo=dancol.org X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-Spam-Score: 0.9 (/) X-Debbugs-Envelope-To: submit X-BeenThere: debbugs-submit <at> debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: <debbugs-submit.debbugs.gnu.org> List-Unsubscribe: <https://debbugs.gnu.org/cgi-bin/mailman/options/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=unsubscribe> List-Archive: <https://debbugs.gnu.org/cgi-bin/mailman/private/debbugs-submit/> List-Post: <mailto:debbugs-submit <at> debbugs.gnu.org> List-Help: <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=help> List-Subscribe: <https://debbugs.gnu.org/cgi-bin/mailman/listinfo/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=subscribe> Errors-To: debbugs-submit-bounces <at> debbugs.gnu.org Sender: "Debbugs-submit" <debbugs-submit-bounces <at> debbugs.gnu.org> X-Spam-Score: -0.1 (/) tramp-accept-process-output should wait for something to actually happen to the process from which we're trying to accept output, not just return immediately after specifying a zero timeout and rely on the caller to poll.
Daniel Colascione <dancol@HIDDEN>:bug-gnu-emacs@HIDDEN.
Full text available.bug-gnu-emacs@HIDDEN:bug#78499; Package emacs.
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