GNU bug report logs - #51692
29.0.50; High CPU in c++ mode. Type finder?

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From: help-debbugs <at> gnu.org (GNU bug Tracking System)
To: David Koppelman <koppel <at> ece.lsu.edu>
Subject: bug#51692: closed (Re: bug#51692: 29.0.50; High CPU in c++ mode.
 Type finder?)
Date: Sat, 13 Nov 2021 12:11:02 +0000

[Message part 1 (text/plain, inline)]

Your bug report

#51692: 29.0.50; High CPU in c++ mode. Type finder?

which was filed against the emacs package, has been closed.

The explanation is attached below, along with your original report.
If you require more details, please reply to 51692 <at> debbugs.gnu.org.

-- 
51692: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=51692
GNU Bug Tracking System
Contact help-debbugs <at> gnu.org with problems

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From: Alan Mackenzie <acm <at> muc.de>
To: Zhiwei Chen <condy0919 <at> gmail.com>
Cc: Yuri D'Elia <wavexx <at> thregr.org>, Lars Ingebrigtsen <larsi <at> gnus.org>,
 David Koppelman <koppel <at> ece.lsu.edu>, 51692-done <at> debbugs.gnu.org
Subject: Re: bug#51692: 29.0.50; High CPU in c++ mode. Type finder?
Date: Sat, 13 Nov 2021 12:10:07 +0000

Hello, Zhiwei, David, Yuri, and Lars.

On Sat, Nov 13, 2021 at 17:24:22 +0800, Zhiwei Chen wrote:
> Alan Mackenzie <acm <at> muc.de> writes:

> > Thanks!  That's good to hear.  I'll just give Zhiwei Chen a little time
> > to reply, and assuming (s)he doesn't find problems, I'll commit the fix.

> It solves the issue after applied the patch on Emacs trunk. Thanks.

Thanks to everybody for the testing.  I have now committed the fix to
the master branch, and am closing the bug with this post.

> -- 
> Zhiwei Chen

-- 
Alan Mackenzie (Nuremberg, Germany).

[Message part 3 (message/rfc822, inline)]

From: David Koppelman <koppel <at> ece.lsu.edu>
To: bug-gnu-emacs <at> gnu.org
Subject: 29.0.50; High CPU in c++ mode. Type finder?
Date: Mon, 08 Nov 2021 13:00:06 -0600

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Load the attached file into a buffer:

./src/emacs --no-init d.cc

Emacs will use 100% CPU on a core while the buffer is visible. CPU usage
goes to normal when switching to another buffer. The attached file is a
reduced version of a much larger file. (The larger file experiences the
high CPU usage only while a certain portion of the code is visible.)

[d.cc (text/plain, attachment)]

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In GNU Emacs 29.0.50 (build 2, x86_64-pc-linux-gnu, GTK+ Version 3.22.30, cairo version 1.15.12)
 of 2021-11-08 built on cyc.ece.lsu.edu
Repository revision: 5861b8d027382ecbd4c0d3dffc283b8ac95b5692
Repository branch: master
Windowing system distributor 'The X.Org Foundation', version 11.0.12010000
System Description: Red Hat Enterprise Linux 8.4 (Ootpa)

Configured using:
 'configure
 PATH=/opt/gnu/gcc11/bin:/bin:/usr/bin:/opt/local/bin:/usr/local/bin:/home/faculty/koppel/scripts:/home/faculty/koppel/r/ga/simtools/bin:/home/faculty/koppel/lbin:/home/apps/bin:/usr/kerberos/bin:/usr/X11R6/bin:/usr/local/cuda/bin:/usr/sbin:/apps/linux/cadence/GENUS211/bin:/apps/linux/cadence/SPECTRE211/tools/bin:/apps/linux/cadence/SPECTRE211/bin:/apps/linux/cadence/SPECTRE191/tools/bin:/apps/linux/cadence/SPECTRE191/bin:/apps/linux/cadence/XCELIUM2103/tools/bin/64bit:/apps/linux/cadence/XCELIUM2103/tools/bin:/apps/linux/cadence/XCELIUM2103/bin:/apps/linux/cadence/IC618/tools/bin:/apps/linux/cadence/IC618/bin:/opt/torque/bin:/extra/localpri/build/depot_tools:/usr/lib64/openmpi/bin:/apps/linux/Mathematica/Executables:/opt/gnu/gcc11/bin:/opt/pgi/linux86-64/17.10/bin
 LD_LIBRARY_PATH=/opt/gnu/gcc11/lib:/opt/gnu/gcc11/lib64:
 CC=/opt/gnu/gcc11/bin/gcc 'CFLAGS=-march=native -O2' --without-pop
 --with-native-compilation'

Configured features:
ACL CAIRO DBUS FREETYPE GIF GLIB GMP GNUTLS GPM GSETTINGS HARFBUZZ JPEG
JSON LCMS2 LIBSELINUX LIBSYSTEMD LIBXML2 MODULES NATIVE_COMP NOTIFY
INOTIFY PDUMPER PNG RSVG SECCOMP SOUND THREADS TIFF TOOLKIT_SCROLL_BARS
WEBP X11 XDBE XIM XPM GTK3 ZLIB

Important settings:
  value of $LC_COLLATE: C
  value of $LC_TIME: C
  value of $LANG: en_US.UTF-8
  locale-coding-system: utf-8-unix

Major mode: C++//l

Minor modes in effect:
  tooltip-mode: t
  global-eldoc-mode: t
  show-paren-mode: t
  electric-indent-mode: t
  mouse-wheel-mode: t
  tool-bar-mode: t
  menu-bar-mode: t
  file-name-shadow-mode: t
  global-font-lock-mode: t
  font-lock-mode: t
  blink-cursor-mode: t
  auto-composition-mode: t
  auto-encryption-mode: t
  auto-compression-mode: t
  line-number-mode: t
  indent-tabs-mode: t
  transient-mark-mode: t
  abbrev-mode: t

Load-path shadows:
None found.

Features:
(shadow sort mail-extr emacsbug comp comp-cstr warnings rx cl-extra
message mailcap yank-media rmc puny dired dired-loaddefs rfc822 mml
mml-sec epa derived epg rfc6068 epg-config gnus-util rmail
rmail-loaddefs auth-source cl-seq eieio eieio-core cl-macs
eieio-loaddefs password-cache json map text-property-search time-date
seq gv subr-x byte-opt bytecomp byte-compile cconv mm-decode mm-bodies
mm-encode mail-parse rfc2231 mailabbrev gmm-utils mailheader sendmail
rfc2047 rfc2045 ietf-drums mm-util mail-prsvr mail-utils vc-git
diff-mode easy-mmode vc-dispatcher cc-mode cc-fonts cc-guess cc-menus
cc-cmds cc-styles cc-align cc-engine cc-vars cc-defs help-mode
cl-loaddefs cl-lib iso-transl tooltip eldoc paren electric uniquify
ediff-hook vc-hooks lisp-float-type elisp-mode mwheel term/x-win x-win
term/common-win x-dnd tool-bar dnd fontset image regexp-opt fringe
tabulated-list replace newcomment text-mode lisp-mode prog-mode register
page tab-bar menu-bar rfn-eshadow isearch easymenu timer select
scroll-bar mouse jit-lock font-lock syntax font-core term/tty-colors
frame minibuffer cl-generic cham georgian utf-8-lang misc-lang
vietnamese tibetan thai tai-viet lao korean japanese eucjp-ms cp51932
hebrew greek romanian slovak czech european ethiopic indian cyrillic
chinese composite emoji-zwj charscript charprop case-table epa-hook
jka-cmpr-hook help simple abbrev obarray cl-preloaded nadvice button
loaddefs faces cus-face macroexp files window text-properties overlay
sha1 md5 base64 format env code-pages mule custom widget
hashtable-print-readable backquote threads dbusbind inotify lcms2
dynamic-setting system-font-setting font-render-setting cairo
move-toolbar gtk x-toolkit x multi-tty make-network-process
native-compile emacs)

Memory information:
((conses 16 129683 8659)
 (symbols 48 10727 1)
 (strings 32 32890 2419)
 (string-bytes 1 1161589)
 (vectors 16 20723)
 (vector-slots 8 397379 17246)
 (floats 8 42 38)
 (intervals 56 413 0)
 (buffers 992 14))

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