On Thu, Nov 20, 2014 at 02:59:36PM +0800, Zhang Haoyu wrote: > >On 20/11/2014 03:20, Zhang Haoyu wrote: > >> Hi all, > >> > >> If I press the one of "Insert/Delete/Home/End/PageUp/PageDown/UpArrow/ > >> DownArrow/LeftArrow/RightArrow" key w/o releasing, then lots of interrupts > >> will be injected to vm(win7/win2008), about 8000/s, the system become very slow, > >> bringing very bad experience. But the other keys are okay. > >> And, linux guest has no this problem. > > > >Do you have a trace for this? What version of QEMU and what UI backend? > > > Sorry for forgetting to mention test environment from the start. > Host: rhel7 with kernel-3.10.0-121 > QEMU: qemu-2.0.2 > Guest: win7(bad),win2008(bad),linux-kernel-3.10.0-121(good) > > No UI backend, directly start the VM via qemu command. > > perf top data when above problem happening: Trace it like this: http://www.linux-kvm.org/page/Tracing -- Gleb. -- 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
