From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!.POSTED.blaine.gmane.org!not-for-mail From: Eli Zaretskii Newsgroups: gmane.emacs.bugs Subject: bug#38345: 27.0.50; Permanent increase in memory consumption after opening images (or pdfs) Date: Mon, 16 Dec 2019 18:30:07 +0200 Message-ID: <83y2vc44j4.fsf@gnu.org> References: <87sgme1ww7.fsf@yantar92-laptop.i-did-not-set--mail-host-address--so-tickle-me> <83o8x0rl6d.fsf@gnu.org> <87lfs2mzo8.fsf@yantar92-laptop.i-did-not-set--mail-host-address--so-tickle-me> <87lfs19shb.fsf@mail.linkov.net> <87a78gn5k5.fsf@yantar92-laptop.i-did-not-set--mail-host-address--so-tickle-me> <83sgm8ox3g.fsf@gnu.org> <87zhgflxmc.fsf@yantar92-laptop.i-did-not-set--mail-host-address--so-tickle-me> <83lfrzq1s1.fsf@gnu.org> <87d0d7w3tt.fsf@yantar92-laptop.i-did-not-set--mail-host-address--so-tickle-me> <83zhgaloc5.fsf@gnu.org> <87zhg7jmjg.fsf@yantar92-laptop.i-did-not-set--mail-host-address--so-tickle-me> <83h82ej03y.fsf@gnu.org> <87fthkokrx.fsf@yantar92-laptop.i-did-not-set--mail-host-address--so-tickle-me> Injection-Info: blaine.gmane.org; posting-host="blaine.gmane.org:195.159.176.226"; logging-data="48098"; mail-complaints-to="usenet@blaine.gmane.org" Cc: 38345@debbugs.gnu.org, juri@linkov.net To: Ihor Radchenko Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Mon Dec 16 18:16:04 2019 Return-path: Envelope-to: geb-bug-gnu-emacs@m.gmane.org Original-Received: from lists.gnu.org ([209.51.188.17]) by blaine.gmane.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.89) (envelope-from ) id 1igtyU-000CLz-7q for geb-bug-gnu-emacs@m.gmane.org; Mon, 16 Dec 2019 18:16:02 +0100 Original-Received: from localhost ([::1]:57260 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1igtyS-0005jW-L4 for geb-bug-gnu-emacs@m.gmane.org; Mon, 16 Dec 2019 12:16:00 -0500 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:58259) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1igtGx-0007in-R7 for bug-gnu-emacs@gnu.org; Mon, 16 Dec 2019 11:31:04 -0500 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1igtGw-0002do-HX for bug-gnu-emacs@gnu.org; Mon, 16 Dec 2019 11:31:03 -0500 Original-Received: from debbugs.gnu.org ([209.51.188.43]:34346) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_128_CBC_SHA1:16) (Exim 4.71) (envelope-from ) id 1igtGw-0002da-Dt for bug-gnu-emacs@gnu.org; Mon, 16 Dec 2019 11:31:02 -0500 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.84_2) (envelope-from ) id 1igtGw-0004Oc-8n for bug-gnu-emacs@gnu.org; Mon, 16 Dec 2019 11:31:02 -0500 X-Loop: help-debbugs@gnu.org Resent-From: Eli Zaretskii Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Mon, 16 Dec 2019 16:31:02 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 38345 X-GNU-PR-Package: emacs Original-Received: via spool by 38345-submit@debbugs.gnu.org id=B38345.157651383316863 (code B ref 38345); Mon, 16 Dec 2019 16:31:02 +0000 Original-Received: (at 38345) by debbugs.gnu.org; 16 Dec 2019 16:30:33 +0000 Original-Received: from localhost ([127.0.0.1]:40319 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1igtGS-0004Nu-S8 for submit@debbugs.gnu.org; Mon, 16 Dec 2019 11:30:33 -0500 Original-Received: from eggs.gnu.org ([209.51.188.92]:48858) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1igtGR-0004Ne-Lw for 38345@debbugs.gnu.org; Mon, 16 Dec 2019 11:30:32 -0500 Original-Received: from fencepost.gnu.org ([2001:470:142:3::e]:33699) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1igtGM-0001r5-8J; Mon, 16 Dec 2019 11:30:26 -0500 Original-Received: from [176.228.60.248] (port=4923 helo=home-c4e4a596f7) by fencepost.gnu.org with esmtpsa (TLS1.2:RSA_AES_256_CBC_SHA1:256) (Exim 4.82) (envelope-from ) id 1igtGJ-0003Ui-Ew; Mon, 16 Dec 2019 11:30:25 -0500 In-reply-to: <87fthkokrx.fsf@yantar92-laptop.i-did-not-set--mail-host-address--so-tickle-me> (message from Ihor Radchenko on Mon, 16 Dec 2019 14:18:58 +0800) X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 209.51.188.43 X-BeenThere: bug-gnu-emacs@gnu.org List-Id: "Bug reports for GNU Emacs, the Swiss army knife of text editors" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Original-Sender: "bug-gnu-emacs" Xref: news.gmane.org gmane.emacs.bugs:173444 Archived-At: > From: Ihor Radchenko > Cc: juri@linkov.net, 38345@debbugs.gnu.org > Date: Mon, 16 Dec 2019 14:18:58 +0800 > > In my earlier email, it described my trial to expunge the images from > cache more aggressively: > > >> also, I repeated my tests manually calling image-clear-cache every Nth > >> image. Every invocation of image-clear-cache does reduce the memory > >> consumption, but there is always some residual remaining unrealeased > >> (see the attached images). The residual seems to scale with the number > >> of images in the cache before clearing. > > You suggested to look at the C code. > > However, looking at the C code, I don't understand then why the > memory consumption is increasing. I can only see that too many images in > c->images array can cause extra memory consumption, which cannot cause > the observed memory leak. I guess that's because the freed memory is not at the end of the heap, and this cannot be returned to the OS. > Do you have any idea why even aggressive cache clearing causes memory > consumption increase? See above. You are talking about "memory consumption", but actually you trace the memory address space allocated to the Emacs process, and that includes memory we freed, but the underlying C library couldn't return back to the OS.