Re: [Xen-ia64-devel] PATCH: rewrite vcpu_get_psr

[Tristan Gingold <tgingold@xxxxxxx>]

On Thu, May 10, 2007 at 02:15:34PM -0600, Alex Williamson wrote:
> On Wed, 2007-05-09 at 06:10 +0200, Tristan Gingold wrote:
> > Hi,
> > 
> > a stripped-down version of a previous patch: reimplement vcpu_get_psr.
> > 
> > Should be a noop, I don't think performance should be affected.
> 
> Unfortunately...
> 
> with patch:
> 
> real    6m0.483s
> user    21m10.680s
> sys     1m18.470s
> 
> without patch:
> 
> real    4m47.767s
> user    16m55.060s
> sys     0m53.240s

Hi,

I can now reproduce this slow-down.

However I don't understand your figures: how can real time be less than user
time ?  Isn't real time the elapsed time ?

Tristan.

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