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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