Intel(r) Core?2 Duo Processors"
Dotan Cohen
dotancohen at gmail.com
Fri Oct 13 16:42:16 UTC 2006
On 13/10/06, John Wendel <john.wendel at metnet.navy.mil> wrote:
> Tony Nelson wrote:
> > At 12:28 AM +0200 10/13/06, Dotan Cohen wrote:
> >> On 12/10/06, Tony Nelson <tonynelson at georgeanelson.com> wrote:
> >>> I have a Athlon 1.2 GHz 512 MB and it is not slow on FC5, though I'm not
> >>> running the same mix as you are. I think possibly something is not right
> >>> on your system. Does top show a high load, or indicate that the system is
> >>> swapping? Perhaps the disks are fragmented -- EXT2/3 data structures don't
> >>> suffer much from fragmentation, but the file data does.
> >> This is top:
> >>
> >> top - 00:26:49 up 15:35, 1 user, load average: 0.77, 0.61, 0.67
> >
> > Load seems low enough.
> >
> >> Tasks: 110 total, 1 running, 109 sleeping, 0 stopped, 0 zombie
> >> Cpu(s): 2.7% us, 0.7% sy, 0.0% ni, 96.3% id, 0.0% wa, 0.3% hi, 0.0% si
> >> Mem: 1002168k total, 952200k used, 49968k free, 42264k buffers
> >> Swap: 1413648k total, 18460k used, 1395188k free, 575176k cached
> >
> > Not using much swap.
> >
> >> PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
> >> 4433 root 15 0 98.6m 56m 4944 S 1.3 5.8 347:19.29 Xorg
> >> 10572 dotancoh 16 0 32148 15m 11m S 1.0 1.6 0:01.07 konsole
> >> 4829 dotancoh 15 0 25544 3684 1752 S 0.7 0.4 2:02.78 dcopserver
> >> 5298 dotancoh 15 0 37460 22m 16m S 0.3 2.3 2:58.72 kicker
> >> 10574 dotancoh 16 0 2192 1112 856 R 0.3 0.1 0:00.05 top
> >> 1 root 16 0 1568 532 460 S 0.0 0.1 0:01.46 init
> >> 2 root RT 0 0 0 0 S 0.0 0.0 0:00.00 migration/0
> >> 3 root 34 19 0 0 0 S 0.0 0.0 0:00.00 ksoftirqd/0
> >> 4 root RT 0 0 0 0 S 0.0 0.0 0:00.00 watchdog/0
> >> 5 root 10 -5 0 0 0 S 0.0 0.0 0:01.34 events/0
> >> 6 root 10 -5 0 0 0 S 0.0 0.0 0:00.02 khelper
> >> 7 root 10 -5 0 0 0 S 0.0 0.0 0:00.00 kthread
> >> 9 root 10 -5 0 0 0 S 0.0 0.0 0:00.16 kblockd/0
> >> 10 root 20 -5 0 0 0 S 0.0 0.0 0:00.00 kacpid
> >> 105 root 15 0 0 0 0 S 0.0 0.0 0:00.24 pdflush
> >> 106 root 15 0 0 0 0 S 0.0 0.0 0:00.76 pdflush
> >> 108 root 18 -5 0 0 0 S 0.0 0.0 0:00.00 aio/0
> >>
> >> How can I check fragmentation. Googling the subject makes me beleive
> >> that this is not the case in general with Linux.
> >
> > The common wisdom is that EXT2/3 are not affected by fragmentation, but
> > without much real-world proof that this is so. The EXT2/3 filesystem
> > metadata was designed to be not much affected by fragmentation, but that
> > says little about the file data. I read an article / webpage (that I can't
> > find right now) by someone who decided to experiment with new and used EXT2
> > filesystems, and found a substatial slowdown. He was inspired to try this
> > because he noticed that his computer sped up when given a fresh filesystem.
> > You could try backing up and restoring to a fresh filesystem. If you
> > spring for a new computer you'll back up and restore to the new computer.
> > Either way you'll get a fresh new filesystem.
>
>
> Look at the Xorg Time. Doesn't 347:19.29 with an uptime of 15:35 seem
> extremely high? On my box, X uses about 4 minutes / hour of uptime.
>
> And the load averages on most of the desktops I use are mostly in the
> 0.1 - 0.3 range. This box has something eating CPU. I don't think the
> file system is the problem.
Thanks, John. What would be a first good step to diagnos this?
Dotan Cohen
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