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
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