[ubuntu-us-mi] Firefox on Lucid

Robert Citek robert.citek at gmail.com
Thu Apr 15 20:28:21 BST 2010


I use Firefox almost all day long (and night, sometimes).  I would say
about twice a day Firefox gets really, really slow.  For example, I'll
be scrolling down a three-page website and Firefox will take in excess
of two minutes to get from the top to the bottom.  Switching between
tabs is also exceedingly slow.  However, I can switch between
applications.  When I switch back to Firefox it takes forever to
redraw the screen.  And the CPU fan kicks into high gear.  The only
solution that has worked so far has been to kill Firefox and then
restart it.  Once I do that, I can scroll up and down the same
three-page website in a split second.

Below are the first few lines of a top and a vmstat.

Has anyone else seen this kind of behaviour?  Any hint as to where the
problem might be: Firefox, Xorg, video driver, other?  Would like to
narrow it down before filing a bug report.

Regards,
- Robert

-----

top - 13:25:05 up 55 min,  2 users,  load average: 1.10, 0.89, 0.69
Tasks: 151 total,   2 running, 149 sleeping,   0 stopped,   0 zombie
Cpu0  :  3.7%us,  1.6%sy,  0.0%ni, 94.7%id,  0.0%wa,  0.0%hi,  0.0%si,  0.0%st
Cpu1  :100.0%us,  0.0%sy,  0.0%ni,  0.0%id,  0.0%wa,  0.0%hi,  0.0%si,  0.0%st
Mem:   1017992k total,   574840k used,   443152k free,    41792k buffers
Swap:  2981880k total,        0k used,  2981880k free,   257936k cached

  PID USER      PR  NI  VIRT  RES  SHR S %CPU %MEM    TIME+  COMMAND
 1517 rwcitek   20   0  380m 140m  30m R  100 14.2   9:21.87
firefox-bin
  987 root      20   0 35836  14m 7980 S    2  1.5   1:48.60 Xorg
  662 messageb  20   0  3264 1600  788 S    1  0.2   0:01.85
dbus-daemon
 1661 rwcitek   20   0 45016  12m 9788 S    1  1.3   0:00.94
gnome-terminal
 1683 rwcitek   20   0  2544 1232  932 R    1  0.1   0:00.91 top
    1 root      20   0  2796 1616 1172 S    0  0.2   0:00.82 init
    2 root      20   0     0    0    0 S    0  0.0   0:00.00 kthreadd
    3 root      RT   0     0    0    0 S    0  0.0   0:00.00
migration/0
    4 root      20   0     0    0    0 S    0  0.0   0:00.03
ksoftirqd/0
    5 root      RT   0     0    0    0 S    0  0.0   0:00.00
watchdog/0


$ vmstat 1 20
procs -----------memory---------- ---swap-- -----io---- -system-- ----cpu----
 r  b   swpd   free   buff  cache   si   so    bi    bo   in   cs us sy id wa
 1  0      0 429520  42328 265684    0    0    36     7  172  307 10  2 87  1
 1  0      0 425212  42328 270492    0    0     0     0  527  449 51  1 48  0
 1  0      0 424808  42328 270652    0    0     0     0  525  444 51  1 49  0
 1  0      0 424808  42328 270624    0    0     0     0  525  445 51  0 49  0
 1  0      0 424808  42328 270552    0    0     0     0  524  442 51  0 49  0
 1  0      0 424808  42328 270752    0    0     0     0  522  439 51  1 48  0
 1  0      0 424808  42336 270752    0    0     0    20  530  462 52  0 48  0
 1  0      0 424808  42336 270752    0    0     0     0  523  438 51  0 49  0
 1  0      0 424808  42336 270756    0    0     0     0  523  445 51  0 49  0
 1  0      0 424808  42336 270732    0    0     0     0  523  460 51  1 49  0
 1  0      0 424808  42336 270732    0    0     0     0  522  445 51  0 49  0
 1  0      0 424808  42336 270732    0    0     0     0  523  450 52  0 49  0
 1  0      0 424808  42344 270732    0    0     0    16  529  476 51  0 49  1
 1  0      0 424808  42344 270532    0    0     0    12  525  443 52  0 49  0
 1  0      0 424808  42344 270476    0    0     0     0  523  446 51  1 49  0
 1  0      0 424808  42344 270480    0    0     0     0  527  441 51  0 49  0
 1  0      0 424808  42344 270472    0    0     0     0  526  447 51  0 49  0
 1  0      0 424808  42344 270472    0    0     0     0  524  446 51  0 49  0
 1  0      0 424808  42352 270472    0    0     0    32  530  456 51  1 48  1
 1  0      0 424808  42352 270472    0    0     0     0  524  448 51  0 49  0



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