Re: buildworld times

From: Andre Guibert de Bruet (andy_at_siliconlandmark.com)
Date: 02/29/04

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    Date: Sun, 29 Feb 2004 16:54:25 -0500 (EST)
To: Vincent Poy <vince@oahu.WURLDLINK.NET>

    On Sat, 28 Feb 2004, Vincent Poy wrote:

    > On Sat, 28 Feb 2004, Don Lewis wrote:
    > >
    > > My 1.5 GHz Pentium-M laptop, with 512 MB RAM, and a 5400 RPM drive, also
    > > running 5.2-CURRENT with the kernel options:
    > > SCHED_ULE
    > > INVARIANTS
    > > INVARIANT_SUPPORT
    > > WITNESS
    > > WITNESS_SKIPSPIN
    > > ACPI_DEBUG
    > > and no /etc/malloc.conf runs buildworld in
    > > 2067.708u 1323.742s 1:01:24.53 92.0% 2816+1833k 23350+5985io 8841pf+0w
    > >
    > > In both cases this was a "make buildworld" with no options (no -j).
    >
    > Hmm, that is weird since I know the WITNESS options are supposedly
    > going to slow down the buildworld process but maybe the thing is that the
    > Pentium-M processor runs cooler as the P4m-2.6Ghz CPU does hit 83C degrees
    > and that's when it chokes as I noticed on a identical windows machine.

    If you're hitting 80+ degrees, your CPU is going to throttle to keep the
    temperature down. This is likely to be the cause (or at least a good
    contributor) of the large buildworld times you're seeing. You might want
    to look into improved cooling, possibly water-cooling. :-)

    Regards,
    Andy

    > Andre Guibert de Bruet | Enterprise Software Consultant >
    > Silicon Landmark, LLC. | http://siliconlandmark.com/ >

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