From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Philip Kaludercic Newsgroups: gmane.emacs.devel Subject: Re: Multithread or multiprocess in emacs?? Date: Mon, 17 Apr 2023 13:37:41 +0000 Message-ID: <87354yiq8q.fsf@posteo.net> References: <7w4yjuxtu6rm325oeddtl3fu4oe64fsarru3s4fnh7on5m7udl.ref@wzxqo5pm6es7> <7w4yjuxtu6rm325oeddtl3fu4oe64fsarru3s4fnh7on5m7udl@wzxqo5pm6es7> Mime-Version: 1.0 Content-Type: text/plain Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="11588"; mail-complaints-to="usenet@ciao.gmane.io" Cc: emacs-devel@gnu.org To: Ergus Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane-mx.org@gnu.org Mon Apr 17 15:38:03 2023 Return-path: Envelope-to: ged-emacs-devel@m.gmane-mx.org Original-Received: from lists.gnu.org ([209.51.188.17]) by ciao.gmane.io with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1poP3S-0002nX-Uw for ged-emacs-devel@m.gmane-mx.org; Mon, 17 Apr 2023 15:38:02 +0200 Original-Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1poP2p-0005nL-Hl; Mon, 17 Apr 2023 09:37:23 -0400 Original-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 1poP2i-0005ho-Nw for emacs-devel@gnu.org; Mon, 17 Apr 2023 09:37:16 -0400 Original-Received: from mout01.posteo.de ([185.67.36.65]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1poP2g-0004Ki-U2 for emacs-devel@gnu.org; Mon, 17 Apr 2023 09:37:16 -0400 Original-Received: from submission (posteo.de [185.67.36.169]) by mout01.posteo.de (Postfix) with ESMTPS id F00E1240101 for ; Mon, 17 Apr 2023 15:37:11 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=posteo.net; s=2017; t=1681738632; bh=Fa2Hk1b6at8Oau23qryQC1l10Ng94FMWKQuXXBUsc/M=; h=From:To:Cc:Subject:Autocrypt:Date:From; b=SMEyYSE8fjINeuXTox3GuYD2fecCYFj3YQyVaix+OpXd2vGQWf5pyRdqiE6nmtDIP kMHa7FCMk7BE9EVc+T+aarthUBsx+60KwjH6/nIjbiiqj9/c2ZC2zS2gMiTm5GgwVz vjuU8RYzERTYOR4xDPhgFtfpbsnoEik5kPZ2VLtHxZvJwbn988XiHU/TYIhes4Edfa BF5gkQS41rHkE67gyrcRgqfqtx4pcu1AjZ+IiAIkLKkYwDTkp9pKOnhF/uWt0UTqv6 lXvr2O/uXCm4d5xivtzjob5iZ8KXzlTkCwGw4YTTlQ2ZMtyOYO2xHJT+emg46NzHy9 94AQKlhidhM5Q== Original-Received: from customer (localhost [127.0.0.1]) by submission (posteo.de) with ESMTPSA id 4Q0SlW1vCTz6tsB; Mon, 17 Apr 2023 15:37:11 +0200 (CEST) In-Reply-To: <7w4yjuxtu6rm325oeddtl3fu4oe64fsarru3s4fnh7on5m7udl@wzxqo5pm6es7> (Ergus's message of "Sun, 16 Apr 2023 22:50:24 +0200") Autocrypt: addr=philipk@posteo.net; keydata= mDMEZBBQQhYJKwYBBAHaRw8BAQdAHJuofBrfqFh12uQu0Yi7mrl525F28eTmwUDflFNmdui0QlBo aWxpcCBLYWx1ZGVyY2ljIChnZW5lcmF0ZWQgYnkgYXV0b2NyeXB0LmVsKSA8cGhpbGlwa0Bwb3N0 ZW8ubmV0PoiWBBMWCAA+FiEEDg7HY17ghYlni8XN8xYDWXahwukFAmQQUEICGwMFCQHhM4AFCwkI BwIGFQoJCAsCBBYCAwECHgECF4AACgkQ8xYDWXahwulikAEA77hloUiSrXgFkUVJhlKBpLCHUjA0 mWZ9j9w5d08+jVwBAK6c4iGP7j+/PhbkxaEKa4V3MzIl7zJkcNNjHCXmvFcEuDgEZBBQQhIKKwYB BAGXVQEFAQEHQI5NLiLRjZy3OfSt1dhCmFyn+fN/QKELUYQetiaoe+MMAwEIB4h+BBgWCAAmFiEE Dg7HY17ghYlni8XN8xYDWXahwukFAmQQUEICGwwFCQHhM4AACgkQ8xYDWXahwukm+wEA8cml4JpK NeAu65rg+auKrPOP6TP/4YWRCTIvuYDm0joBALw98AMz7/qMHvSCeU/hw9PL6u6R2EScxtpKnWof z4oM Received-SPF: pass client-ip=185.67.36.65; envelope-from=philipk@posteo.net; helo=mout01.posteo.de X-Spam_score_int: -43 X-Spam_score: -4.4 X-Spam_bar: ---- X-Spam_report: (-4.4 / 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, RCVD_IN_DNSWL_MED=-2.3, RCVD_IN_MSPIKE_H2=-0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: emacs-devel@gnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: "Emacs development discussions." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: emacs-devel-bounces+ged-emacs-devel=m.gmane-mx.org@gnu.org Original-Sender: emacs-devel-bounces+ged-emacs-devel=m.gmane-mx.org@gnu.org Xref: news.gmane.io gmane.emacs.devel:305365 Archived-At: Ergus writes: > Hi: > > Very recently I have seen a code in an elpa package that starts async > subprocesses; but instead of using make-process the package uses > make-thread + process-file. This was to reduce the latency and some > lagging (not evident in my system, but apparently it annoyed the > package's author). > > So, my question is now: Has anyone measured the overhead created by > make-process in critical parts of the code like flymake checkers, or > ispell? and compared with creating new threads? > > If this is somehow significant maybe we may consider adding a helper > thread or thread-pool for some purposes as now the C11 standard has the > threads.h header. Note that C11 threads are controversial[0], but also optional. Also, I might be mistaken, but shouldn't Pthreads in some form be available on platforms that Emacs runs on? Also, see (elisp) C Dialect. There was an article[1] on the topic last year, which might be helpful. [0] https://gustedt.wordpress.com/2012/10/14/c11-defects-c-threads-are-not-realizable-with-posix-threads/ [1] https://coredumped.dev/2022/05/19/a-vision-of-a-multi-threaded-emacs/. > Is there any work already in this direction? How does Elisp handles > multithreading? > > Best, > Ergus