Re: [Xen-devel] Re: [PATCH 3/5] x86/pvclock: add vsyscall implementation

Avi Kivity
2009-10-29T15:07:56Z

On 10/29/2009 04:46 PM, Dan Magenheimer wrote:
> No, the apps I'm familiar with (a DB and a JVM) need a timestamp
> not a monotonic counter. The timestamps must be relatively
> accurate (e.g. we've been talking about gettimeofday generically,
> but these apps would use clock_gettime for nsec resolution),
> monotonically increasing, and work properly across a VM
> migration. The timestamps are taken up to a 100K/sec or
> more so the apps need to ensure they are using the fastest
> mechanism available that meets those requirements.
>

Out of interest, do you know (and can you relate) why those apps need
100k/sec monotonically increasing timestamps?

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error compiling committee.c: too many arguments to function