Messages in this thread | | | Date | Mon, 26 Oct 2009 08:01:12 +0100 | From | Ingo Molnar <> | Subject | Re: [PATCH 3/3] sched: Disable affine wakeups by default |
| |
* Mike Galbraith <efault@gmx.de> wrote:
> On Mon, 2009-10-26 at 06:47 +0100, Mike Galbraith wrote: > > On Sun, 2009-10-25 at 22:36 -0700, Arjan van de Ven wrote: > > > > if you're a multicore domain you better have a shared cache.. > > > that's what it should mean. If it does not we should fix that. > > > > Sounds reasonable to me. I'll go make explosions. > > (Actually, if multicode and sibling does indeed mean shared cache, no > arch tinkering should be necessary, just reset SD_WAKE_AFFINE when > degenerating should work fine. Only thing is multicore with > siblings.. and test test test)
Correct. There's a few cpus where multicore means separate caches but all modern CPUs have shared caches for cores so we want to tune for that.
Ingo
| |