[Buildbot-devel] large variability in slave compile times -- trying to optimize

[Philippe McLean]

thanks.

Turns out we were swapping on the VM host... sorry for the noise!

On Fri, Jun 24, 2011 at 4:36 PM, Dustin J. Mitchell <dustin at v.igoro.us>wrote:

> On Fri, Jun 24, 2011 at 6:26 PM, Philippe McLean
> <philippe.mclean at gmail.com> wrote:
> > I think we may be swapping on the VM host ... I will update when I have
> more
> > information.
> >
> > FTR, assigning multiple cores to a vm does not substantially improve
> build
> > times under devenv.com (even when multi processing is enabled).
> > With a 2-core vm (under vmware fusion), I see 8:32 build time; with 1
> core,
> > I see 9:35 build time.
>
> At Mozilla we've noted a long time ago that the MS compilers have a
> single-threaded linker, so you don't gain much from throwing extra
> CPUs at it.
>
> Dustin
>
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