A question about HLT VM-Exit handling time

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Correct the typo in the subject.

> -----Original Message-----
> From: kvm-owner@xxxxxxxxxxxxxxx [mailto:kvm-owner@xxxxxxxxxxxxxxx] On
> Behalf Of Wu, Feng
> Sent: Thursday, October 16, 2014 4:16 PM
> To: kvm@xxxxxxxxxxxxxxx
> Cc: Xiao Guangrong
> Subject: A question about HTL VM-Exit handling time
> 
> Hi folks,
> 
> I run kernel build in the guest and use perf kvm to get some VM-Exit result as
> the following:
> 
> Analyze events for all VCPUs:
> 
>              VM-EXIT    Samples  Samples%     Time%   Min Time
> Max Time         A
> 
>            MSR_WRITE    3613908    57.53%    18.97%        5us
> 1362us      9.73
>                  HLT    1399747    22.28%    74.90%        5us
> 432448us     99.24
>            CR_ACCESS     961203    15.30%     3.28%        4us
> 188us      6.33
>   EXTERNAL_INTERRUPT     213821     3.40%     2.25%        4us
> 4089us     19.54
>        EXCEPTION_NMI      25152     0.40%     0.12%        4us
> 71us      9.05
>        EPT_MISCONFIG      20104     0.32%     0.15%        8us
> 5628us     13.74
>                CPUID      19904     0.32%     0.07%        4us
> 220us      6.90
>       IO_INSTRUCTION      17097     0.27%     0.20%       13us
> 1008us     22.08
>    PAUSE_INSTRUCTION      10737     0.17%     0.05%        4us
> 53us      8.33
>             MSR_READ         48     0.00%     0.00%        4us
> 8us      5.62
> 
> Total Samples:6281721, Total events handled time:185457820.41us.
> 
> I also do some other experiments with different workload in the guest, I got the
> same results in terms of
> HLT VM-Exit handling time. Does anyone know why the handling time for HLT
> VM-Exit is so high? Appreciate
> You help!
> 
> Thanks,
> Feng
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