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

[Dustin J. Mitchell]

On Fri, Jun 24, 2011 at 5:25 PM, Philippe McLean
<philippe.mclean at gmail.com> wrote:
> I'm wondering if there might be some network/IO issues with buildbot on the
> server? (Does anyone else run masters on windows?)

I don't think many do..

It'd be interesting to know *where* the slaves are spending most of
their time.  How much log output do the jobs produce?  There should be
enough buffer space for a spike in load on the master to not even
cause the ongoing build process to block.

I don't have any particular suggestions for debugging, since I would
probably dive right in with strace or dtruss, and I dont' know if such
tools are available for Windows.

I've seen a lot of trouble with VMs and wildly divergent build times -
I don't have any idea why, though.

Can you add a bug for this, and use the keyword 'performance', to
track your investigations?

Dustin