Re: page fault scalability patch V12: rss tasklist vs sloppy rss

William Lee Irwin III
2004-12-09T22:52:59Z

On Thu, Dec 09, 2004 at 02:02:37PM -0800, Christoph Lameter wrote:
> I was not also able to get the high numbers of > 3 mio faults with atomic
> rss + prefaulting but was able to get that with tasklist + prefault. The
> atomic version shares the locality problems with the sloppy approach.

The implementation of the atomic version at least improperly places
the counter's cacheline, so the results for that are gibberish.

Unless the algorithms being compared are properly implemented, they're
straw men, not valid comparisons.

-- wli