Re: kvm-unit-test failures

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Il 03/09/2014 20:25, Chris J Arges ha scritto:
> <snip>
>> I'm not sure about the reason for the warp, but indeed the offset and
>> uptime match (I'll check them against the trace tomorrow) so it's "just"
>> that the VM's TSC base is not taken into account correctly.
>>
>> Can you gather another trace with the problematic patch reverted?
>>
>> Paolo
>>
> 
> Here is the third trace running with 0d3da0d2 reverted from the latest
> kvm queue branch 11cc9ea3:
> 
> http://people.canonical.com/~arges/kvm/trace-3.dat.xz

Thanks!  And---yay!---I reproduced it on another machine.

Paolo

> $ uptime
>  18:25:13 up 5 min,  1 user,  load average: 0.21, 0.74, 0.44
> 
> 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 1409768537
> enabling apic
> enabling apic
> kvm-clock: cpu 0, msr 0x:44e520
> kvm-clock: cpu 0, msr 0x:44e520
> Wallclock test, threshold 5
> Seconds get from host:     1409768537
> Seconds get from kvmclock: 1409768538
> Offset:                    1
> Wallclock test, threshold 5
> Seconds get from host:     1409768537
> Seconds get from kvmclock: 1409768538
> Offset:                    1
> 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:  1241970306
> Measure the performance of adjusted cycle ...
> Total vcpus: 2
> Test  loops: 10000000
> TSC cycles:  3266701026
> Return value from qemu: 1
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