Fedora Core 3 test 2 performance
Glenn Stauffer
alaxsxaq at gmail.com
Fri Oct 8 13:19:49 UTC 2004
Thanks for the link.
The drive is an IBM Travelstar 60gb 5400 rpm hard drive.
I booted into single user mode and did some testing to compare to what
I was seeing at runlevel 5. (cr = cached reads timing; br = buffered
reads timing) The numbers represent the highest MB/sec from 4
consecutive executions of hdparm -tT
hdparm -c0 -d0 -u0 /dev/hda
Single user:
cr: 704
br: 2.89
RL 5
cr: 698
br: 2.46
hdparm -c1 -d1 -u1 /dev/hda
Single User:
cr: 724
br: 21.15
RL 5
cr: 709 MB/sec
br: 16.97 MB/sec
So, I guess at 16.97 MB/sec in runlevel 5, I'm seeing about the best I
can expect from this drive. At least with more or less standard
hdparm settings.
So, I'm getting sufficient performance from the drives now, but
startup still takes about 4 minutes from entering my password. If I
run hdparm -tT immediately after login, I see buffered reads around
2.5 MB/sec!
Top shows load averages around 2 with the CPU showing 90+% waiting.
After a short while, the system drops to about 98% idle, but my disk
timings do not immediately improve.
Puzzling!
Glenn
On Fri, 08 Oct 2004 08:34:54 -0400, Ted Kaczmarek <tedkaz at optonline.net> wrote:
> Did enabling dma speed it up?
>
> http://www.justlinux.com/nhf/Hardware/Hard_Drive_Speed_Tweak_for_Linux.html
>
> Should have pasted this before.
>
> I get consistent 36.00 MB/sec on my Sager, but it has 7200 rpm drive and
> this is with FC2 running 2.6.8-1.521.
>
> Ted
>
>
>
> On Fri, 2004-10-08 at 13:01 +0100, VJ wrote:
> > But he set DMA to 1 ( -d1 ).
> > VJ
> >
> > On Fri, October 8, 2004 1:00 pm, Ted Kaczmarek said:
> > >
> > >
> > > On Fri, 2004-10-08 at 07:29 -0400, Glenn Stauffer wrote:
> > >> I installed Core 3 test 2 on a Dell Precision M50 laptop. The
> > >> performance is abysmal.
> > >>
> > >> >From the login screen to the desktop takes almost 4 minutes. Disk
> > >> performance seems to have a lot to do with this. With an hdparm line
> > >> like:
> > >>
> > >> hdparm -d1 -c1 -u1 /dev/hda
> > >>
> > >> I see variable results. with repeated cycles of hdparm -t, I'll see
> > >> anything from 570 kB/sec to 10 MB/sec. Nothing higher. Other Dell
> > >> laptop users report read rates closer to 20 MB/sec from what I can
> > >> glean from Internet posts.
> > >>
> > >> Any good resources for tuning a Fedora system? Any other advice?
> > >>
> > >> Thanks, Glenn
> > >
> > >
> > > dma setting may be your problem.
> > >
> > > Ted
> > >
> > > --
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> > > fedora-list at redhat.com
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> > >
> >
>
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