Re: Corruption Stats: Suggested Blacklist from the data

Chris Wedgwood (
Thu, 30 Jul 1998 12:25:31 +1200

On Thu, Jul 30, 1998 at 12:52:22AM +0200, MOLNAR Ingo wrote:

> so the only thing left is to poke the PCI bus directly and measure that
> speed. Unfortunately i have found no way to create some reliable
> nonintrusive transaction on the PCI bus that can be measured. maybe
> reading the config space takes some constant number of PCI cycles?

reading/writing to a frame-buffer - using rdtsc ?

Sure, not everyone has a frame-buffer - but its probably going to be
the most common thing you can probe unobtrusively (well, it will do
no harm) that many machines will have.

Actually, since not everyone has a frame-buffer, maybe it could be
done under X using DGA to get access to the video ram?


To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to
Please read the FAQ at