On Mon, May 02, 2016 at 04:58:17PM +0200, Peter Zijlstra wrote: > On Mon, May 02, 2016 at 04:50:04PM +0200, Mike Galbraith wrote: > > Oh btw, did you know single socket boxen have no sd_busy? That doesn't > > look right. > > I suspected; didn't bother looking at yet. The 'problem' is that the LLC > domain is the top-most, so it doesn't have a parent domain. I'm sure we > can come up with something if we can get this all working right. > > And yes, I can get gains on various workloads with various options, I > can even break all workloads, but I've so far completely failed on > getting a win for everyone :/
Adding in the task_hot() check to decide if scanning idle was a good idea ended up being really important. I'm happy to try a few variations here as well, do you have a more recent patch? -chris
