https://bugs.kde.org/show_bug.cgi?id=243569
juha.heljora...@iki.fi changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |juha.heljora...@iki.fi
--- Comment #24 from <juha heljoranta iki fi> 2011-09-14 08:36:16 ---
kmail constantly eats 5-6 % cpu on my laptop. This is quite annoying because it
consumes battery quite fast.
I did some quick debugging.
$ kmail --version
Qt: 4.7.3
KDE Development Platform: 4.6.5 (4.6.5)
KMail: 1.13.7
$ cat /etc/system-release
Fedora release 15 (Lovelock)
$ strace -p $(pidof kmail) &> /tmp/kmail.strace ; (Ctrl-C after few seconds)
$ sort /tmp/kmail.strace | uniq -c | sort -n
1 poll([{fd=3, events=POLLIN}, {fd=9, events=POLLIN}, {fd=8,
events=POLLIN}, {fd=5, events=POLLIN}, {fd=14, events=POLLIN}, {fd=16,
events=POLLIN}, {fd=25, events=POLLIN}, {fd=26, events=POLLIN}, {fd=27,
events=POLLIN}, {fd=31, events=POLLIN}, {fd=33, events=POLLIN}, {fd=36,
events=POLLIN}, {fd=38, events=POLLIN}, {fd=37, events=POLLIN}, {fd=39,
events=POLLIN}], 15, 10) = 0 (Timeout)
1 poll([{fd=3, events=POLLIN}, {fd=9, events=POLLIN}, {fd=8,
events=POLLIN}, {fd=5, events=POLLIN}, {fd=14, events=POLLIN}, {fd=16,
events=POLLIN}, {fd=25, events=POLLIN}, {fd=26, events=POLLIN}, {fd=27,
events=POLLIN}, {fd=31, events=POLLIN}, {fd=33, events=POLLIN}, {fd=36,
events=POLLIN}, {fd=38, events=POLLIN}, {fd=37, events=POLLIN}, {fd=39,
events=POLLIN}], 15, 11) = 0 (Timeout)
1 poll([{fd=3, events=POLLIN}, {fd=9, events=POLLIN}, {fd=8,
events=POLLIN}, {fd=5, events=POLLIN}, {fd=14, events=POLLIN}, {fd=16,
events=POLLIN}, {fd=25, events=POLLIN}, {fd=26, events=POLLIN}, {fd=27,
events=POLLIN}, {fd=31, events=POLLIN}, {fd=33, events=POLLIN}, {fd=36,
events=POLLIN}, {fd=38, events=POLLIN}, {fd=37, events=POLLIN}, {fd=39,
events=POLLIN}], 15, 15 <unfinished ...>
1 poll([{fd=3, events=POLLIN}, {fd=9, events=POLLIN}, {fd=8,
events=POLLIN}, {fd=5, events=POLLIN}, {fd=14, events=POLLIN}, {fd=16,
events=POLLIN}, {fd=25, events=POLLIN}, {fd=26, events=POLLIN}, {fd=27,
events=POLLIN}, {fd=31, events=POLLIN}, {fd=33, events=POLLIN}, {fd=36,
events=POLLIN}, {fd=38, events=POLLIN}, {fd=37, events=POLLIN}, {fd=39,
events=POLLIN}], 15, 2) = 0 (Timeout)
1 poll([{fd=3, events=POLLIN}, {fd=9, events=POLLIN}, {fd=8,
events=POLLIN}, {fd=5, events=POLLIN}, {fd=14, events=POLLIN}, {fd=16,
events=POLLIN}, {fd=25, events=POLLIN}, {fd=26, events=POLLIN}, {fd=27,
events=POLLIN}, {fd=31, events=POLLIN}, {fd=33, events=POLLIN}, {fd=36,
events=POLLIN}, {fd=38, events=POLLIN}, {fd=37, events=POLLIN}, {fd=39,
events=POLLIN}], 15, 4) = 0 (Timeout)
1 Process 2079 detached
44 poll([{fd=3, events=POLLIN}, {fd=9, events=POLLIN}, {fd=8,
events=POLLIN}, {fd=5, events=POLLIN}, {fd=14, events=POLLIN}, {fd=16,
events=POLLIN}, {fd=25, events=POLLIN}, {fd=26, events=POLLIN}, {fd=27,
events=POLLIN}, {fd=31, events=POLLIN}, {fd=33, events=POLLIN}, {fd=36,
events=POLLIN}, {fd=38, events=POLLIN}, {fd=37, events=POLLIN}, {fd=39,
events=POLLIN}], 15, 0) = 0 (Timeout)
84 poll([{fd=3, events=POLLIN}, {fd=9, events=POLLIN}, {fd=8,
events=POLLIN}, {fd=5, events=POLLIN}, {fd=14, events=POLLIN}, {fd=16,
events=POLLIN}, {fd=25, events=POLLIN}, {fd=26, events=POLLIN}, {fd=27,
events=POLLIN}, {fd=31, events=POLLIN}, {fd=33, events=POLLIN}, {fd=36,
events=POLLIN}, {fd=38, events=POLLIN}, {fd=37, events=POLLIN}, {fd=39,
events=POLLIN}], 15, 15) = 0 (Timeout)
87 poll([{fd=3, events=POLLIN}, {fd=9, events=POLLIN}, {fd=8,
events=POLLIN}, {fd=5, events=POLLIN}, {fd=14, events=POLLIN}, {fd=16,
events=POLLIN}, {fd=25, events=POLLIN}, {fd=26, events=POLLIN}, {fd=27,
events=POLLIN}, {fd=31, events=POLLIN}, {fd=33, events=POLLIN}, {fd=36,
events=POLLIN}, {fd=38, events=POLLIN}, {fd=37, events=POLLIN}, {fd=39,
events=POLLIN}], 15, 14) = 0 (Timeout)
174 stat("/etc/localtime", {st_mode=S_IFREG|0644, st_size=1883, ...}) = 0
438 read(8, 0x1b94df4, 4096) = -1 EAGAIN (Resource
temporarily unavailable)
$ lsof -n -p $(pidof kmail) > /tmp/kmail.lsof
# select file descriptors from kmail strace
$ for fd in $(sort -u /tmp/kmail.strace | egrep -o 'fd=[[:digit:]]+' | sort -u
| sed -e 's/fd=//'); do egrep " $fd(u|r|w)" /tmp/kmail.lsof; done
kmail 2079 xxx 14u unix 0xffff8801fd17ad80 0t0 24968 socket
kmail 2079 xxx 16u unix 0xffff8801fd370680 0t0 23184
/tmp/ksocket-xxx/kmailGm2079.slave-socket
kmail 2079 xxx 25u unix 0xffff8801cf564ac0 0t0 27569 socket
kmail 2079 xxx 26r 0000 0,9 0 4063 anon_inode
kmail 2079 xxx 27u unix 0xffff8801f67e57c0 0t0 38315 socket
kmail 2079 xxx 3r FIFO 0,8 0t0 23983 pipe
kmail 2079 xxx 31u unix 0xffff8801cf55e800 0t0 44507
/tmp/ksocket-xxx/kmailfp2079.slave-socket
kmail 2079 xxx 33u unix 0xffff8801cf55f840 0t0 44511
/tmp/ksocket-xxx/kmailKU2079.slave-socket
kmail 2079 xxx 36u unix 0xffff8801f67e71c0 0t0 93677
/tmp/ksocket-xxx/kmailGS2079.slave-socket
kmail 2079 xxx 37u sock 0,6 0t0 135541 can't
identify protocol
kmail 2079 xxx 38u unix 0xffff8801cf55aa40 0t0 91663
/tmp/ksocket-xxx/kmailug2079.slave-socket
kmail 2079 xxx 39u unix 0xffff8801f3935480 0t0 135542 socket
kmail 2079 xxx 5u unix 0xffff88022d8a3a80 0t0 22970 socket
kmail 2079 xxx 8u unix 0xffff88020393f1c0 0t0 23985 socket
kmail 2079 xxx 9u unix 0xffff8801fd17de40 0t0 24801 socket
Hope this helps.
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