Messages in this thread | | | Date | Fri, 2 Feb 2018 13:58:46 +0100 | From | Peter Zijlstra <> | Subject | Re: [PATCH 4/4] sched/fair: Use a recently used CPU as an idle candidate and the basis for SIS |
| |
On Fri, Feb 02, 2018 at 12:42:29PM +0100, Rafael J. Wysocki wrote: > > Yes, too many synchronous IPIs, which themselves are typically already > > more expensive than the MSR access. > > We could do all of the updates in one IPI (as Srinivas said), but it would be > more code, and custom code for that matter. > > Is this really worth it for a slow path like this one?
Probably not, still, the pattern really annoys me ;-)
| |