Re: lmbench lat_mmap slowdown with CONFIG_PARAVIRT

From: Nick Piggin
Date: Tue Jan 20 2009 - 09:41:27 EST

On Tue, Jan 20, 2009 at 03:17:35PM +0100, Ingo Molnar wrote:
> * Nick Piggin <npiggin@xxxxxxx> wrote:
> >
> > BTW. the lmbench test I run directly (it's called lat_mmap.c, and gets
> > compiled into a standalone lat_mmap exec by the standard lmbench build).
> doesnt that include an indeterminate number of gettimeofday() based
> calibration calls? That would make it harder to measure its total costs in
> a comparative way.

Hmm... yes probably for really detailed profile comparisons or
other external measurements it would need modification.
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