From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Eli Zaretskii Newsgroups: gmane.emacs.help Subject: Re: How to debug high CPU usage -> hang Date: Thu, 12 Jan 2023 09:36:43 +0200 Message-ID: <83v8lckxv8.fsf@gnu.org> References: <831qo2o1p2.fsf@gnu.org> Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="24409"; mail-complaints-to="usenet@ciao.gmane.io" To: help-gnu-emacs@gnu.org Original-X-From: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane-mx.org@gnu.org Thu Jan 12 08:36:52 2023 Return-path: Envelope-to: geh-help-gnu-emacs@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 1pFs8p-0006BT-O5 for geh-help-gnu-emacs@m.gmane-mx.org; Thu, 12 Jan 2023 08:36:51 +0100 Original-Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1pFs8F-0001LS-NV; Thu, 12 Jan 2023 02:36:15 -0500 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 1pFs8D-0001Hk-MK for help-gnu-emacs@gnu.org; Thu, 12 Jan 2023 02:36:13 -0500 Original-Received: from fencepost.gnu.org ([2001:470:142:3::e]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1pFs8B-00025Z-Df for help-gnu-emacs@gnu.org; Thu, 12 Jan 2023 02:36:13 -0500 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=gnu.org; s=fencepost-gnu-org; h=References:Subject:In-Reply-To:To:From:Date: mime-version; bh=mKg+r8mdBzHWbukcO2UNapk2AIbvi8Tz9UzeIbhfivk=; b=poFyVLcpOcEC xjWL7/+TC/EJ+9cUe94TUg0g+wEHlmVUkaLDt4bRtADyGD851IkJI9s4fimVqnlPfxr7zEszFrrjS Sdt5nL4CuCzJBVhwTlsiaXmY4n0jQEctvckrtW2YO4Y6vtvH0tBmyfHMnaUq1Yf+yuS9q5WrIGDP1 pvf+taqLgwQImnXkDLTjV5TUOl1Fw1QPC3Ou0U0rgtcKRijDE7lJdOpac78jV1TYR/6YNuCxNVvd9 E0QpKXIirYayJ812PYHjUvIv78F6RlAAW6xyl1xJ8y67JxmEc9XDSuxHRQ/iSlxT7urg8L80ABXmX m/UX3XqQPExizVE2pSkGhw==; Original-Received: from [87.69.77.57] (helo=home-c4e4a596f7) by fencepost.gnu.org with esmtpsa (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1pFs8A-0004pQ-Im for help-gnu-emacs@gnu.org; Thu, 12 Jan 2023 02:36:10 -0500 In-Reply-To: (message from Ken Goldman on Wed, 11 Jan 2023 15:24:53 -0500) X-BeenThere: help-gnu-emacs@gnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Users list for the GNU Emacs text editor List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane-mx.org@gnu.org Original-Sender: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane-mx.org@gnu.org Xref: news.gmane.io gmane.emacs.help:142210 Archived-At: > From: Ken Goldman > Date: Wed, 11 Jan 2023 15:24:53 -0500 > > On 1/10/2023 10:21 AM, Eli Zaretskii wrote: > >> From: Ken Goldman > >> Date: Tue, 10 Jan 2023 09:58:58 -0500 > >> > >> I'm editing in ReST mode, Windows 11, emacs 28.1. > >> > >> Occasionally, I want to jump (search, etc.) and the CPU usage jumps and > >> emacs hangs. I suspect a font-lock issue. > >> > >> I fixed one by bisecting the text, then changing a table type. Now I > >> have another. > >> > >> Is there a general way to debug? > > > > I can suggest profiling and/or attaching a debugger. > > > > Attaching a debugger to the lisp major mode, or building emacs from > source? Attaching a debugger (GDB) to Emacs when its CPU usage jumps. This requires Emacs built with debug info, or installing the separate debug info from your distro.