tree a5d7ac3aa58a3e189a8f7c3b4d185d32457389e7
parent 061862386e8062046cc980e1be1fc4779159411e
author Paul E. McKenney <paulmck@linux.vnet.ibm.com> 1389829721 -0800
committer Paul E. McKenney <paulmck@linux.vnet.ibm.com> 1392755180 -0800

rcutorture: Enable concurrent rcutorture runs

The rcutorture tests run by default range from using one CPU to using
sixteen of them.  Therefore, rcutorture testing could be sped up
significantly simply by running the kernels in parallel.  Building
them in parallel is not all that helpful: "make -j" is usually a
better bet.  So this commit takes a new "--cpus" argument that
specifies how many CPUs rcutorture is permitted to use for its
parallel runs.  The default of zero does sequential runs as before.

The bin-packing is minimal, and will be grossly suboptimal for
some configurations.  However, powers of two work reasonably well.

Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Reviewed-by: Josh Triplett <josh@joshtriplett.org>