Re: Fedora Core 3 test 2 performance

From: Glenn Stauffer (alaxsxaq_at_gmail.com)
Date: 10/08/04

  • Next message: Nifty Hat Mitch: "Re: tty's aren't reused" 
    Date: Fri, 8 Oct 2004 09:19:49 -0400
To: tedkaz@optonline.net, For users of Fedora Core releases <fedora-list@redhat.com>

    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@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
    > > >
    > > > --
    > > > fedora-list mailing list
    > > > fedora-list@redhat.com
    > > > To unsubscribe: http://www.redhat.com/mailman/listinfo/fedora-list
    > > >
    > >
    >
    > --
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    > 

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