Messages in this thread | | | Subject | Re: Abysmal scheduler performance in Linus' tree? | From | Mike Galbraith <> | Date | Thu, 07 Sep 2017 08:15:29 +0200 |
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On Wed, 2017-09-06 at 18:14 +0200, Peter Zijlstra wrote: > On Wed, Sep 06, 2017 at 11:03:33AM +0200, Peter Zijlstra wrote: > > On Wed, Sep 06, 2017 at 01:59:14AM -0700, Andy Lutomirski wrote: > > > > Any specifics on your setup? > > > > > > On further fiddling, I only see this after a suspend and resume cycle. > > > > Ah, ok. That's not something I otherwise test. Lets see if I can force > > this brick of mine through a suspend-resume cycle :-) > > I'd be suspicious of these here commits: > > 77d1dfda0e79 ("sched/topology, cpuset: Avoid spurious/wrong domain rebuilds")
Seems to be that one. After suspend/resume, cpu7 (i4790+SMT) is online with NULL domain. offline/online it, it grows proper domains.
-Mike
(on vacation, about to go explore that unfamiliar 'outside' place)
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