distcc only builds locally when using rpmbuild

[Sam Varshavchik]

Suvayu Ali writes:

> On Sun, May 31, 2015 at 03:29:29PM -0400, Sam Varshavchik wrote:
> > Suvayu Ali writes:
> >
> > >On Sun, May 31, 2015 at 01:24:07PM -0400, Sam Varshavchik wrote:
> > >>
> > >> >> ps shows the maximum number of "/usr/bin/distcc /usr/bin/g++  
> [options]"
> > >> >> processes running locally, that I but nothing gets distributed to  
> other
> > >> >> hosts.
> > >>
> > >> I've got distcc configured for 10 concurrent builds. 4 local, 6  
> distributed
> > >> to another host. I see ten distcc processes on the local machine during  
> the
> > >> rpmbuild, /var/log/messages on the other host shows nothing – it logs
> > >distcc
> > >> server activity otherwise – and the local host appears to be running  
> only
> > >> four concurrent compiles.
> > >
> > >Are you running under mock?  Maybe chroot is preventing remote builds?
> >
> > No, this is an ordinary rpmbuild.
>
> How does rpmbulid decide how many threads to run?  I think it looks at
> the local machine and decides.  I also recall some variable called
> RPMBUILD_NCPU or something like that.  That would explain why it only
> uses as many threads as the local machine can handle.
>
> Hope this helps,

Sadly, no it doesn't.  As I wrote above:

> > >> >> ps shows the maximum number of "/usr/bin/distcc /usr/bin/g++  
> [options]"
> > >> >> processes running locally,

rpmbuild uses the _smp_mflags macro to pass the -j parameter to make, and I  
have it correctly configured to kick off ten parallel processes, to match  
the maximum number of ten processes distcc is configured (4 local, 6  
remote). Yet, despite the fact that a manual build distributes the compiles  
correctly, with rpmbuild distcc throttles the number of concurrent parallel  
jobs that it kicks off to four, and runs them locally.
 

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