On Mon, Feb 10, 2014 at 05:58:54PM +0000, Peter Zijlstra wrote: > On Mon, Feb 10, 2014 at 05:44:21PM +0000, Mark Rutland wrote: > > This patch makes ctx_flexible_sched_in attempt to schedule every group > > in the flexible_groups list even when earlier groups failed to schedule, > > enabling more groups to be scheduled simultaneously. > > Since you're basically free to create as many events as you want, you can > (as an unprivilidged user) make the context switch to and from your task > arbitrarily expensive.
Not that it makes the approach any better, but surely this is already the case for software events? I can create as many as I want, and they'll always try to schedule. I'll take a look into other ways to stop disparate PMUs' events from adversely affecting each other. I guess it might not be possible to solve the general problem without allowing said expensive context switch. Thanks, Mark. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
