Messages in this thread | | | Date | Mon, 19 Dec 2011 13:59:37 +0200 | From | Avi Kivity <> | Subject | Re: [RFC PATCH 0/4] Gang scheduling in CFS |
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On 12/19/2011 01:50 PM, Nikunj A Dadhania wrote: > On Mon, 19 Dec 2011 13:44:02 +0200, Avi Kivity <avi@redhat.com> wrote: > > On 12/19/2011 01:23 PM, Ingo Molnar wrote: > > > What's behind this huge speedup? Does ebizzy use user-space > > > spinlocks perhaps? Could we do something on the user-space side > > > to get a similar speedup? > > > > kvm tries to detect spinlocks (by trapping repeated executions of PAUSE) > > and yield to a related vcpu. It's far from perfect however, and relies > > on the spinlock code using PAUSE. > > > Avi, is this soft-PLE kind of thing?
No, hard PLE, see the calls to yield_to.
-- error compiling committee.c: too many arguments to function
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