Re: Success with new futex code from 2.6.0-test5
Ingo Molnar <[email protected]> Wed, 10 Sep 2003 23:29:35 +0200 (CEST)
| Newsgroups | gmane.comp.lib.phil |
|---|---|
| Message-ID | <[email protected]> |
On Wed, 10 Sep 2003, Bill Soudan wrote: > I made the .config changes prior to appling Jamie's patch -- they didn't > seem to have any major effect. Though I didn't specifically measure the > difference, I made sure the symbols that caught your attention were no > longer in the oprofile results. I still had the same issue, however, > until I applied Jamie's patch. ok. > If you'd like measurements for some reason, I'd be happy to get them. no need - i only wanted to know for sure that the 'freeze' things was indeed caused by suboptimal locking in the futex code. It was then probably just some 4-CPU race for the same lock, causing some real bad cacheline movements between CPUs. Ingo