From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Stefan Monnier Newsgroups: gmane.emacs.devel Subject: Re: Memory usage report Date: Fri, 18 Sep 2020 11:15:02 -0400 Message-ID: References: <87lfh8kyot.fsf@gnus.org> <83k0ws5hzt.fsf@gnu.org> <87h7rwkxtk.fsf@gnus.org> <83imcb61p7.fsf@gnu.org> <871rizl5mf.fsf@gnus.org> <83r1qz48h3.fsf@gnu.org> <871rizjogr.fsf@gnus.org> <83pn6j45rr.fsf@gnu.org> <87wo0ri6kz.fsf@gnus.org> <83o8m34433.fsf@gnu.org> <87imcb43e3.fsf@localhost> <83k0wr4222.fsf@gnu.org> <87zh5nfa95.fsf@gnus.org> Mime-Version: 1.0 Content-Type: text/plain Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="3461"; mail-complaints-to="usenet@ciao.gmane.io" User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/28.0.50 (gnu/linux) Cc: Eli Zaretskii , Ihor Radchenko , emacs-devel@gnu.org To: Lars Ingebrigtsen Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane-mx.org@gnu.org Fri Sep 18 17:26:59 2020 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 1kJIHq-0000li-T7 for ged-emacs-devel@m.gmane-mx.org; Fri, 18 Sep 2020 17:26:58 +0200 Original-Received: from localhost ([::1]:55128 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1kJIHp-0004jU-UL for ged-emacs-devel@m.gmane-mx.org; Fri, 18 Sep 2020 11:26:57 -0400 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:50268) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1kJI6T-0008LK-6N for emacs-devel@gnu.org; Fri, 18 Sep 2020 11:15:13 -0400 Original-Received: from mailscanner.iro.umontreal.ca ([132.204.25.50]:53549) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1kJI6P-0002VC-Pg; Fri, 18 Sep 2020 11:15:12 -0400 Original-Received: from pmg1.iro.umontreal.ca (localhost.localdomain [127.0.0.1]) by pmg1.iro.umontreal.ca (Proxmox) with ESMTP id E9A29100234; Fri, 18 Sep 2020 11:15:05 -0400 (EDT) Original-Received: from mail01.iro.umontreal.ca (unknown [172.31.2.1]) by pmg1.iro.umontreal.ca (Proxmox) with ESMTP id 0F14810022B; Fri, 18 Sep 2020 11:15:04 -0400 (EDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=iro.umontreal.ca; s=mail; t=1600442104; bh=rvH4WxQ10Y50TbRqDB2zNmV/spipSeWuAfXRDPtaTXQ=; h=From:To:Cc:Subject:References:Date:In-Reply-To:From; b=BlBaE0ymfZKKDUKs+ILZG0U6AGgqMEpNbgWQ1Y+yQvaqSd5CLJ9uYlaUs2AET9GvC BUjBy7No+xhmumaHJpvRlfjF4dizeRLyHm3FkDQYmyfDSoBewsemKeBFsz2+2fnxB+ IxABReX9TTKOhvsDNA8v6atrUeWfuprogdRFA9S43olmhmfOjhx7FWrH1o7/rWYHxd CQI7qTx+rMj84qbkqRW9EJxSyDVQsMVIG/QJhOG2C/mFiJuycj0CFBFS+LDFUsDolE AP90Fy4e5LC3vYWGfbmz6bSSmv+P4D2fN4uyrV71GI4zKxg3jcaBwTBeCMNJY1Ypoc GyqtoM9ZdQeWQ== Original-Received: from alfajor (unknown [45.72.232.131]) by mail01.iro.umontreal.ca (Postfix) with ESMTPSA id B46721201D0; Fri, 18 Sep 2020 11:15:03 -0400 (EDT) In-Reply-To: <87zh5nfa95.fsf@gnus.org> (Lars Ingebrigtsen's message of "Fri, 18 Sep 2020 16:08:22 +0200") Received-SPF: pass client-ip=132.204.25.50; envelope-from=monnier@iro.umontreal.ca; helo=mailscanner.iro.umontreal.ca X-detected-operating-system: by eggs.gnu.org: First seen = 2020/09/18 11:15:06 X-ACL-Warn: Detected OS = Linux 2.2.x-3.x [generic] X-Spam_score_int: -42 X-Spam_score: -4.3 X-Spam_bar: ---- X-Spam_report: (-4.3 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, RCVD_IN_DNSWL_MED=-2.3, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: emacs-devel@gnu.org X-Mailman-Version: 2.1.23 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" Xref: news.gmane.io gmane.emacs.devel:256095 Archived-At: >> Well, Lars basically said the same, but neither of you explain _why_ >> would something like that be useful. Do tell, please. > > If you see that you've got 13GBs worth of cons cells, you might wonder > what variable that's holding on to them. The list of "largest > variables", with `some-stupid-mode-I'd-forgotten-about-cache' on top > will give you a hint. Eli's question boils down to: can you point to a concrete case where this would have been useful? I have done such digging once or twice when the Lisp heap was taking more space than I expected, but it's quite rare IME (and apparently in Eli's as well). So, while it might be nice to add it to `memory-usage` it's unlikely to help in the more common cases of excessive memory use where the memory is eaten up by objects allocated in the C part of the heap. Stefan