On 09/03/2014 09:47 AM, Paolo Bonzini wrote: > Il 02/09/2014 21:57, Chris J Arges ha scritto: >>>> Can you please trace the test using trace-cmd >>>> (http://www.linux-kvm.org/page/Tracing) and send the output? >>>> >>>> Paolo >>>> >> Paolo, >> >> I have posted the trace data here: >> http://people.canonical.com/~arges/kvm/trace.dat.xz > > Can you try running the test again (no need to get a new trace) with > clocksource=hpet on the kernel command line? > > Paolo > ./x86-run x86/kvmclock_test.flat -smp 2 --append "10000000 `date +%s`" qemu-system-x86_64 -enable-kvm -device pc-testdev -device isa-debug-exit,iobase=0xf4,iosize=0x4 -display none -serial stdio -device pci-testdev -kernel x86/kvmclock_test.flat -smp 2 --append 10000000 1409757645 enabling apic enabling apic kvm-clock: cpu 0, msr 0x:44d4c0 kvm-clock: cpu 0, msr 0x:44d4c0 Wallclock test, threshold 5 Seconds get from host: 1409757645 Seconds get from kvmclock: 1409757645 Offset: 0 Check the stability of raw cycle ... Total vcpus: 2 Test loops: 10000000 Total warps: 0 Total stalls: 0 Worst warp: 0 Raw cycle is stable Monotonic cycle test: Total vcpus: 2 Test loops: 10000000 Total warps: 0 Total stalls: 0 Worst warp: 0 Measure the performance of raw cycle ... Total vcpus: 2 Test loops: 10000000 TSC cycles: 1106490299 Measure the performance of adjusted cycle ... Total vcpus: 2 Test loops: 10000000 TSC cycles: 3463433372 Return value from qemu: 1 Ok this passes, I'll now try the patch without the cmdline option. --chris -- 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
