Package: emacs;
Reported by: Frank Winklmeier <frank.winklmeier <at> cern.ch>
Date: Wed, 2 Aug 2017 15:30:02 UTC
Severity: normal
Tags: moreinfo
Found in version 25.2.50
Done: Lars Ingebrigtsen <larsi <at> gnus.org>
Bug is archived. No further changes may be made.
View this message in rfc822 format
From: Frank Winklmeier <frank.winklmeier <at> cern.ch> To: 27918 <at> debbugs.gnu.org Subject: bug#27918: 25.2.50; Emacs slow opening files via sshfs Date: Wed, 2 Aug 2017 10:31:33 +0200
Switching from
GNU Emacs 24.5.1 (x86_64-pc-linux-gnu, GTK+ Version 3.18.9)
of 2016-04-17 on lgw01-04, modified by Debian
to
In GNU Emacs 25.2.50.2 (x86_64-pc-linux-gnu, GTK+ Version 3.18.9)
of 2017-07-03 built on lcy01-14
I noticed that opening files via an sshfs mounted remote has gotten
extremely slow (about 10 seconds vs 2 seconds for opening the same
file). If it helps, here are some straces showing that the time is spent
in read calls:
strace -CrTw emacs24 -nw -Q /path/to/my/sshfs/file.txt
% time seconds usecs/call calls errors syscall
------ ----------- ----------- --------- --------- ----------------
63.55 1.578241 263040 6 pselect6
23.11 0.574017 1232 466 1 read
10.39 0.258128 2607 99 77 faccessat
1.51 0.037418 411 91 51 stat
0.55 0.013633 14 972 806 open
0.17 0.004245 25 167 166 readlinkat
strace -CrTw emacs25 -nw -Q /path/to/my/sshfs/file.txt
% time seconds usecs/call calls errors syscall
------ ----------- ----------- --------- --------- ----------------
83.43 8.913163 16475 541 1 read
13.76 1.470122 183765 8 pselect6
2.19 0.233506 1962 119 88 faccessat
0.21 0.022881 13 1730 1520 open
0.16 0.016923 83 205 204 readlinkat
Please let me know if other information is useful to debug this.
Windowing system distributor 'The X.Org Foundation', version 11.0.11804000
System Description: Ubuntu 16.04.2 LTS
Configured using:
'configure --build=x86_64-linux-gnu --prefix=/usr
'--includedir=${prefix}/include' '--mandir=${prefix}/share/man'
'--infodir=${prefix}/share/info' --sysconfdir=/etc --localstatedir=/var
--disable-silent-rules '--libdir=${prefix}/lib/x86_64-linux-gnu'
'--libexecdir=${prefix}/lib/x86_64-linux-gnu' --disable-maintainer-mode
--disable-dependency-tracking --prefix=/usr --sharedstatedir=/var/lib
--program-suffix=25 --with-modules=yes --with-x=yes
--with-x-toolkit=gtk3 --with-xwidgets=yes 'CFLAGS=-g -O2
-fstack-protector-strong -Wformat -Werror=format-security'
'CPPFLAGS=-Wdate-time -D_FORTIFY_SOURCE=2'
'LDFLAGS=-Wl,-Bsymbolic-functions -Wl,-z,relro''
Configured features:
XPM JPEG TIFF GIF PNG RSVG IMAGEMAGICK SOUND GPM DBUS GCONF GSETTINGS
NOTIFY LIBSELINUX GNUTLS LIBXML2 FREETYPE M17N_FLT LIBOTF XFT ZLIB
TOOLKIT_SCROLL_BARS GTK3 X11 MODULES XWIDGETS
Important settings:
value of $LC_MONETARY: en_GB.UTF-8
value of $LC_NUMERIC: en_GB.UTF-8
value of $LC_TIME: en_GB.UTF-8
value of $LANG: en_US.UTF-8
value of $XMODIFIERS: @im=ibus
locale-coding-system: utf-8-unix
Major mode: Fundamental
Minor modes in effect:
global-company-mode: t
pyvenv-mode: t
shell-dirtrack-mode: t
recentf-mode: t
tooltip-mode: t
global-eldoc-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
blink-cursor-mode: t
auto-composition-mode: t
auto-encryption-mode: t
auto-compression-mode: t
buffer-read-only: t
line-number-mode: t
transient-mark-mode: t
Recent messages:
Loading /home/fwinkl/.recentf...done
Cleaning up the recentf list...done (0 removed)
Company backend ’company-ropemacs’ could not be initialized:
Symbol’s function definition is void: company-ropemacs
For information about GNU Emacs and the GNU system, type C-h C-a.
Note: file is write protected
View mode: type C-h for help, h for commands, q to quit.
Mark saved where search started [5 times]
Making completion list...
Load-path shadows:
/usr/share/emacs/site-lisp/dictionaries-common/flyspell hides
/usr/share/emacs/25.2.50/lisp/textmodes/flyspell
/usr/share/emacs/site-lisp/dictionaries-common/ispell hides
/usr/share/emacs/25.2.50/lisp/textmodes/ispell
Features:
(shadow sort mail-extr emacsbug message dired rfc822 mml mml-sec epg
mm-decode mm-bodies mm-encode mail-parse rfc2231 mailabbrev gmm-utils
mailheader sendmail rfc2047 rfc2045 ietf-drums mail-utils misearch
multi-isearch goto-addr thingatpt noutline outline easy-mmode view
vc-dispatcher vc-svn cc-mode cc-fonts cc-guess cc-menus cc-cmds
cc-styles cc-align cc-engine cc-vars cc-defs company-files
company-oddmuse company-keywords company-etags company-gtags
company-dabbrev-code company-dabbrev company-capf company-cmake
company-semantic company-eclim company-template company-css company-nxml
company-bbdb flymake company elpy pyvenv elpy-refactor python tramp-sh
tramp tramp-compat auth-source gnus-util mm-util help-fns mail-prsvr
password-cache tramp-loaddefs trampver ucs-normalize shell pcomplete
format-spec advice json map ido grep compile comint ansi-color files-x
etags xref cl-seq project eieio eieio-core cl-macs ring cus-edit
cus-start cus-load finder-inf info tex-site package epg-config seq
byte-opt gv bytecomp byte-compile cl-extra help-mode cconv edmacro
kmacro recentf tree-widget wid-edit cl-loaddefs pcase cl-lib easymenu
time-date mule-util tooltip eldoc electric uniquify ediff-hook vc-hooks
lisp-float-type mwheel x-win term/common-win x-dnd tool-bar dnd fontset
image regexp-opt fringe tabulated-list newcomment elisp-mode lisp-mode
prog-mode register page menu-bar rfn-eshadow timer select scroll-bar
mouse jit-lock font-lock syntax facemenu font-core frame 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 charscript case-table epa-hook
jka-cmpr-hook help simple abbrev minibuffer cl-preloaded nadvice
loaddefs button faces cus-face macroexp files text-properties overlay
sha1 md5 base64 format env code-pages mule custom widget
hashtable-print-readable backquote dbusbind inotify dynamic-setting
system-font-setting font-render-setting xwidget-internal move-toolbar
gtk x-toolkit x multi-tty make-network-process emacs)
Memory information:
((conses 16 364676 12088)
(symbols 48 34067 0)
(miscs 40 767 228)
(strings 32 70715 9792)
(string-bytes 1 2115980)
(vectors 16 51409)
(vector-slots 8 895437 7532)
(floats 8 324 144)
(intervals 56 340 0)
(buffers 976 19)
(heap 1024 38850 1495))
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Copyright (C) 1999 Darren O. Benham,
1997,2003 nCipher Corporation Ltd,
1994-97 Ian Jackson.