On Fri, 2011-05-27 at 11:47 +0100, Stefan Hajnoczi wrote: > On Fri, May 27, 2011 at 11:36 AM, Sasha Levin <levinsasha928@xxxxxxxxx> wrote: > > ioeventfd is way provided by KVM to receive notifications about > > reads and writes to PIO and MMIO areas within the guest. > > > > Such notifications are usefull if all we need to know is that > > a specific area of the memory has been changed, and we don't need > > a heavyweight exit to happen. > > > > The implementation uses epoll to scale to large number of ioeventfds. > > > > Signed-off-by: Sasha Levin <levinsasha928@xxxxxxxxx> > > --- > > tools/kvm/Makefile | 1 + > > tools/kvm/include/kvm/ioeventfd.h | 27 ++++++++ > > tools/kvm/ioeventfd.c | 127 +++++++++++++++++++++++++++++++++++++ > > tools/kvm/kvm-run.c | 4 + > > 4 files changed, 159 insertions(+), 0 deletions(-) > > create mode 100644 tools/kvm/include/kvm/ioeventfd.h > > create mode 100644 tools/kvm/ioeventfd.c > > Did you run any benchmarks? > > Stefan Yes, they showed a nice improvements - I'll post them with a V2 of the patch. -- Sasha. -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
