# David Young 2007-03-09:
> On Fri, Mar 09, 2007 at 04:19:42PM -0500, Blair Sadewitz wrote:
> > On amd64 -current, all of my PCI latency timer values read 0x00.  The
> > BIOS setting is 0xff, but I take it that different cards can have
> > different requirements.  However, thus far I haven't noticed that I
> > have any hardware which explicitly sets it.  Is this expected
> > behavior?
> > 
> > If someone could please sanity-check the following, I'd appreciate it.
> 
> The latency timer values do look wrong, but I am no longer astonished
> when PCI BIOS screws that up.  What is really extraordinary is that the
> devices' minimum grant is zero.
> 
> Is the performance of your system ok?
> 
> I see that you have PCI Express on your system.  Maybe the latency timer
> has a different significance on PCIe than on "legacy" PCI.

The Master Latency Timer does not apply to PCIe "and should be
hardwired to 0". At a quick glance that is.

	-- Jachym