Re: FreeBSD IO Performance (was Re: Quality of FreeBSD)

From: Bohdan Horst (nexus_at_hoth.amu.edu.pl)
Date: 09/25/05

  • Next message: Daniel O'Connor: "Re: lpt0 always busy" 
    Date: Sun, 25 Sep 2005 11:40:14 +0200
To: Mark Kirkwood <markir@paradise.net.nz>

    On Mon, Jul 25, 2005 at 06:00:21PM +0200, Bohdan Horst wrote:
    > On Mon, Jul 25, 2005 at 10:15:41PM +1200, Mark Kirkwood wrote:
    > > Hmm - looks like I missed that thread, never mind - repeatability of
    > > findings is sound scientific principle :-)
    > >
    > > With respect to changing the default for vfs.read_max - makes sense to
    > > me, but it would be interesting to know if anyone has a system that
    > > performs *worse* with it set to 16.
    > >
    > > regards
    > >
    > > Mark
    > >
    > > Chris wrote:
    > > >Its been mentioned before and most experience the same as you by
    > > >setting it to 16 a dramatic improvement in the sequential read, I
    > > >currently run all my 5.x servers like this with no issues as a result.
    > > > I am curious if the default will ever be changed.
    >
    > on my notebook:
    > IBM TP 600x
    > 5.4-RELEASE-p4
    > ad0: 38154MB <IC25N040ATCS04-0/CA4OA71A> [77520/16/63] at ata0-master UDMA33
    > APM enable (but same effect with disable APM)
    > AAC unfortunatelly not supported :(
    >
    >
    > anything above vfs.read_max=1 produce very annoying little sound (i can
    > hear disk heads) when playing movies..

    new notebook, new results:

    Toshiba 1410-614
    5.4-RELEASE-p7
    atapci0: <Intel ICH3 UDMA100 controller>
    ad0: 38154MB <WDC WD400VE-75HDT0/09.07D09> [77520/16/63] at ata0-master UDMA100

    anything above vfs.read_max=1 produce sometimes very annoying little
    image glitch/freeze (synchronized with hdd led) when playing movies...
    (with AAC disk is now silent:)

    regards 

    -- 
Bohdan 'Nexus' Horst
_______________________________________________
freebsd-stable@freebsd.org mailing list
http://lists.freebsd.org/mailman/listinfo/freebsd-stable
To unsubscribe, send any mail to "freebsd-stable-unsubscribe@freebsd.org"
  • Next message: Daniel O'Connor: "Re: lpt0 always busy"

    Relevant Pages

    • Re: Question processor speed
      ... McCarty" wrote: ... You can't open a notebook and update. ... >> internet explorer screens, MS word, MS excel, Windows media player, etc, ... >> Best regards, ...
      (microsoft.public.windowsxp.general)
    • Re: Strong Signal Cannot Find Server
      ... When I plugged in the notebook directly, ... Best regards, FAQ for Wireless Internet: ... John Navas FAQ for Wi-Fi: ...
      (alt.internet.wireless)
    • 2.6.20-rc3: Clocksource tsc unstable
      ... I got this message after suspend;resume on my notebook ... Clocksource tsc unstable (delta = -154983451 ns) ... e-mail: jirislaby gmail com, gpg pubkey fingerprint: ...
      (Linux-Kernel)
    • Re: CodeGear - Do you want to sell me an IDE?
      ... I must admit to being confused about this one. ... I've never registered D7 on my notebook and it says unregistered copy when ... As long as you do have the licence, ... Regards ...
      (borland.public.delphi.non-technical)