Your message dated Sat, 06 Sep 2014 11:11:06 +0800
with message-id <[email protected]>
and subject line Re: Bug#742642: gnome-shell I/O % due to swapin delay(?)
has caused the Debian Bug report #742642,
regarding iotop reports gnome-shell I/O% but no disk I/O being done
to be marked as done.
This means that you claim that the problem has been dealt with.
If this is not the case it is now your responsibility to reopen the
Bug report if necessary, and/or fix the problem forthwith.
(NB: If you are a system administrator and have no idea what this
message is talking about, this may indicate a serious mail system
misconfiguration somewhere. Please contact [email protected]
immediately.)
--
742642: http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=742642
Debian Bug Tracking System
Contact [email protected] with problems
--- Begin Message ---
Package: iotop
Version: 0.6-1
Severity: normal
Dear Maintainer,
*** Reporter, please consider answering these questions, where appropriate ***
* What led up to the situation?
iotop -o shows gnome-shell doing I/O (non-zero '%I/O' value) when in fact
no disk I/O is being done by gnome-shell.
* What exactly did you do (or not do) that was effective (or
ineffective)?
ran iotop -o to show tasks doing current I/O
* What was the outcome of this action?
A few threads show up in each screen, with gnome-shell consistently showing
at or near the top of the '%I/O' column, but no disk I/O was shown in the top
summary or any of the individual process lines.
* What outcome did you expect instead?
Investigation of the gnome-shell process via strace and /proc/<pid>/fd showed
the recvmsg and writev I/O being done to Unix sockets, not files on disk.
I think this may be a quirk (or maybe bug) in the netlink/taskstats interface
where Unix socket I/O is being counted as block I/O. I will try and write a
test program to loop doing socket I/O and see if iotop shows it doing a % of
I/O.
*** End of the template - remove these template lines ***
-- System Information:
Debian Release: jessie/sid
APT prefers testing
APT policy: (990, 'testing'), (500, 'unstable')
Architecture: i386 (i686)
Kernel: Linux 3.13.5-1inter04-686-pae (SMP w/2 CPU cores; PREEMPT)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8) (ignored: LC_ALL
set to en_US.UTF-8)
Shell: /bin/sh linked to /bin/dash
Versions of packages iotop depends on:
ii python 2.7.5-5
iotop recommends no packages.
iotop suggests no packages.
-- no debconf information
--- End Message ---
--- Begin Message ---
On Wed, 2014-09-03 at 11:53 -0400, Dominique Brazziel wrote:
> I think we can chalk this phenomenon up to blkio and/or swapin
> delay on behalf of gnome-shell and pat iotop on the back as having
> helped diagnose the problem.
Thanks for the analysis.
> Thanks for your work on iotop. OK to close.
Closing with this mail.
--
bye,
pabs
http://wiki.debian.org/PaulWise
signature.asc
Description: This is a digitally signed message part
--- End Message ---
