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    SubjectRe: [RFC PATCH 0/4] Gang scheduling in CFS
    On 12/19/2011 02:06 PM, Nikunj A Dadhania wrote:
    > On Mon, 19 Dec 2011 13:59:37 +0200, Avi Kivity <avi@redhat.com> wrote:
    > > 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.
    > >
    > The above ebizzy result is from a non-PLE machine, will yield_to come
    > in to picture here?

    No. I have a soft-PLE patchset but I don't think it's any good.

    --
    error compiling committee.c: too many arguments to function



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