lkml.org 
[lkml]   [2012]   [Feb]   [7]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    /
    Date
    From
    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:0.019 / U:237.436 seconds]
    ©2003-2016 Jasper Spaans. hosted at Digital OceanAdvertise on this site