RE: [RFC] 4-level page table directories.

Chen, Kenneth W
2005-11-04T21:42:41Z

Robin Holt wrote on Friday, November 04, 2005 1:38 PM
> On Fri, Nov 04, 2005 at 10:51:07AM -0800, Chen, Kenneth W wrote:
> > Luck, Tony wrote on Wednesday, November 02, 2005 8:31 AM
> > > Good to hear that (though I must remember to specify what I mean
> > > by "small memory" when talking to SGI ... there are ia64 boxes
> > > with only 1G :-)
> > >
> > > Ken: Any predictions on when a 4-level run might get to the
> > > top of your queue for a run with an industry standard transaction
> > > benchmark?
> >
> > It turns out that we have measurable performance regression with
> > 4-level page table running industry database benchmark, the penalty
> > is ~0.2% (I thought the number would be smaller than 0.2%, but ...).
> > Our resolution with this workload is typically 0.05%.
>
> Can you point me at this benchmark?

I hope everyone knows by now what this "industry standard database
transaction processing benchmark" is. If not, please google it.

Sorry, this is the best I can do without breaking any U.S. law.

- Ken