Hi,
This is probably nothing... but I was testing something else and I wondered why
there are so many calls to getrlimit about the size of the stack...
These are the "top 10" calls from one second dump of strace for the xulrunner
process (first field is the count):
$ (strace -p 10762 2>&1 & sleep 1 && pkill strace) | awk '{a[$0]+=1} END {for
(k in a) {print a[k],k}}' | sort -k 1 -rn | head
58498 getrlimit(RLIMIT_STACK, {rlim_cur=8192*1024, rlim_max=RLIM_INFINITY}) = 0
53 read(13, 0xb4d65058, 4096) = -1 EAGAIN (Resource temporarily
unavailable)
26 poll([{fd=4, events=POLLIN}, {fd=13, events=POLLIN}, {fd=6, events=POLLIN}],
3, 0) = 0 (Timeout)
16 poll([{fd=4, events=POLLIN}, {fd=13, events=POLLIN}], 2, 0) = 0 (Timeout)
12 semop(131073, {{0, -1, SEM_UNDO}}, 1) = 0
12 semop(131073, {{0, 1, SEM_UNDO}}, 1) = 0
6 poll([{fd=4, events=POLLIN}, {fd=13, events=POLLIN}, {fd=6, events=POLLIN}],
3, 9) = 0 (Timeout)
5 write(7, "!", 1) = 1
5 read(6, "!", 1) = 1
5 poll([{fd=4, events=POLLIN}, {fd=13, events=POLLIN}, {fd=6, events=POLLIN}],
3, 0) = 1 ([{fd=6, revents=POLLIN}])
so there are almost 60.000 calls per second (min:53.000 max:64.000) to
RLIMIT_STACK ...
I must be missing something...
I could trim it down to this pages:
http://www.merriam-webster.com/dictionary/xul - 10.058 calls per second (pretty
stable +/- 2) video there was off
When starting the video it spiked to 55.000 and remained there while loading
(even after the video was paused). The plugin crashed soon afterwards.
A second try showed the same numbers. When the video finished loading it
remained at ~60.000 and after it stopped it remained the same.
This only stops if the tab is closed.
Some data:
$ iceweasel -v
Mozilla Iceweasel 10.0.6
$ ps ux | grep xulrunner
user 14065 5.7 0.5 228076 43484 ? SLl 14:56 0:29
/usr/lib/xulrunner-10.0/plugin-container
/usr/lib/flashplayer-mozilla/libflashplayer.so -greomni
/usr/lib/xulrunner-10.0/omni.ja 13625 plugin
$ uname -a
Linux tux104 2.6.32-5-686-bigmem #1 SMP Sun May 6 04:39:05 UTC 2012 i686
GNU/Linux
$ lsb_release -d
Description: Debian GNU/Linux 6.0.5 (squeeze)
flash player: 11.2.202.236
probably is nothing but it does look awkward to me...
Cheers,
Estani
--
Estanislao Gonzalez
Institute of Meteorology
Freie Universität Berlin
Climate System Modeling Working Group
Carl-Heinrich-Becker Weg 6-10, Room 079 AB/1
D-12165 Berlin
Phone: +49 30 838-71116
Mail: estanislao.gonza...@met.fu-berlin.de
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