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    SubjectRe: [Qemu-devel] [RFC] Next gen kvm api
    On 02/06/2012 09:11 PM, Anthony Liguori wrote:
    > I'm not so sure. ioeventfds and a future mmio-over-socketpair have to
    > put the kthread to sleep while it waits for the other end to process
    > it. This is effectively equivalent to a heavy weight exit. The
    > difference in cost is dropping to userspace which is really neglible
    > these days (< 100 cycles).

    On what machine did you measure these wonderful numbers?

    But I agree a heavyweight exit is probably faster than a double context
    switch on a remote core.

    I have a truly marvellous patch that fixes the bug which this
    signature is too narrow to contain.

     \ /
      Last update: 2012-02-07 13:07    [W:0.021 / U:14.916 seconds]
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