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Date:      Wed, 04 Mar 1998 20:42:21 -0800
From:      Mike Smith <mike@smith.net.au>
To:        current@FreeBSD.ORG
Subject:   Re: silo overflows (Was Re: 3.0-RELEASE?) 
Message-ID:  <199803050442.UAA24219@dingo.cdrom.com>
In-Reply-To: Your message of "Thu, 05 Mar 1998 14:37:03 %2B1000." <199803050437.OAA09160@troll.dtir.qld.gov.au> 

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> >> I was wondering though if any PCI experts knew if a PCI video card could
> >> starve the PCI-ISA bridge of cycles.  Any experts out there?
> >
> >It's quite possible; it would depend on the PCI latency timer settings, 
> >but generally the latency provided for there is only of the order of a 
> >few microseconds.
> 
> So, how would I print these latency timer settings from FreeBSD?  Would I
> just get a meaningless jumble of numbers anyway? ;-)

You should be able to adjust the setting in the system BIOS setup.

This is only likely to be an issue if the card does busmaster transfers 
to/from main memory.

-- 
\\  Sometimes you're ahead,       \\  Mike Smith
\\  sometimes you're behind.      \\  mike@smith.net.au
\\  The race is long, and in the  \\  msmith@freebsd.org
\\  end it's only with yourself.  \\  msmith@cdrom.com



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