tree d64ad4724552898c9c49ba19f715c74c5caa504c
parent 091f893625269fd12adadf7d1f60c21b4b83e779
author Dave Borowitz <dborowitz@google.com> 1351036979 -0700
committer Dave Borowitz <dborowitz@google.com> 1351177968 -0700

sync: Run gc --auto in parallel

We can't just let this run wild with a high (or even low) -j, since
that would hose a system. Instead, limit the total number of threads
across all git gc subprocesses to the number of CPUs reported by the
multiprocessing module (available in Python 2.6 and above).

Change-Id: Icca0161a1e6116ffa5f7cfc6f5faecda510a7fb9