All,
For some time i am experiencing the high cpu rate on Firefox (2.0.0.14,
Fedora 8) with some sites (sites with flash are always high on cpu and
crash sometimes). I have done the following to find out what is going on
when firefox is high on cpu.
# ps -p 27727 -mlfFL
F S UID PID PPID LWP C NLWP PRI NI ADDR SZ WCHAN RSS PSR
STIME TTY TIME CMD
0 - srikanth 27727 27722 - 5 13 - - - 99974 - 132048 -
15:43 ? 00:19:31 /usr/lib/firefox-2.0.0.14/firefox-bin
0 S srikanth - - 27727 4 - 80 0 - - - - 1
15:43 - 00:14:41 -
1 S srikanth - - 27728 0 - 80 0 - - - - 0
15:43 - 00:00:00 -
1 S srikanth - - 27729 0 - 80 0 - - - - 0
15:43 - 00:00:08 -
1 S srikanth - - 27731 0 - 80 0 - - - - 0
15:43 - 00:00:00 -
1 S srikanth - - 27732 0 - 80 0 - - - - 0
15:43 - 00:00:00 -
1 S srikanth - - 27733 0 - 80 0 - - - - 0
15:43 - 00:00:00 -
1 S srikanth - - 27827 0 - 80 0 - - - - 0
15:43 - 00:00:00 -
1 S srikanth - - 5540 0 - 80 0 - - - - 0
19:40 - 00:00:00 -
1 S srikanth - - 15572 68 - 80 0 - - - - 1
21:37 - 00:04:02 -
1 S srikanth - - 15573 0 - 80 0 - - - - 0
21:37 - 00:00:00 -
1 S srikanth - - 15574 0 - 80 0 - - - - 0
21:37 - 00:00:00 -
1 S srikanth - - 15702 0 - 80 0 - - - - 1
21:39 - 00:00:00 -
1 S srikanth - - 15775 0 - 80 0 - - - - 1
21:41 - 00:00:00 -
As per the above output the thread with LWP 15572 has the following from
pstack output.
Thread 7 (Thread 164613008 (LWP 15572)):
#0 0x00110402 in __kernel_vsyscall ()
#1 0x00be95d5 in pthread_cond_wait@@GLIBC_2.3.2 () from
/lib/libpthread.so.0
#2 0x08196ff8 in __cxa_pure_virtual ()
#3 0x08291438 in __cxa_pure_virtual ()
#4 0x0819734d in __cxa_pure_virtual ()
#5 0x00be550b in start_thread () from /lib/libpthread.so.0
#6 0x00b26b2e in clone () from /lib/libc.so.6
It appears that "pthread_cond_wait@@GLIBC_2.3.2 ()" could be the cause
for high percentage of CPU but don't know how to go further with this.
Any help would be appreciated.
Thanks
Srikanth
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