[Buildbot-devel] `make clean' is too slow on buildbot

[Weongyo Jeong]

On Fri, Apr 23, 2010 at 10:30:38AM -0700, Dustin J. Mitchell wrote:
> On Thu, Apr 22, 2010 at 4:33 PM, Weongyo Jeong <weongyo.jeong at gmail.com> wrote:
> > It takes 32 seconds if I read it correctly. ??In real it normally took 2
> > ~ 3 seconds that server is enough fast having 4 core CPU and 8 GB mem.
> > Is there any reason?
> 
> Buildbot doesn't do anything unusual that would cause slowness.
> 
> Any number of things could cause this -- virtual machine clock skew?

What virtual machine means?  VMware or VirtualBox?  Buildbot didn't run
on virtual machine.  It ran on Dell server.

> Maybe the 'make clean' in that instance actually had a lot of files to
> remove?

One thing I noticed during `make clean' is that `make' process consumes
100% CPU at a moment.  But as you know make(1) operations are related
with mostly disk I/O so it doesn't make sense to me that it consumes a
lot of CPU.

> Maybe those files are on an NFS mount that was busy at the
> time?

No it's not on NFS mount point.  Normally the disks are very idle.

> Memory or CPU contention?

No.  I think it has enough memory and CPU cores.

regards,
Weongyo Jeong