[Piglit] [PATCH] piglit-run: Add option to enable/disable concurrent test runs

[Chad Versace]

On Fri, 17 Jun 2011 12:14:19 -0700, Eric Anholt <eric at anholt.net> wrote:
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> On Fri, 17 Jun 2011 10:57:30 -0700, Chad Versace <chad at chad-versace.us> wrote:
> > -c bool, --concurrent=bool  Enable/disable concurrent test runs. Valid
> > 			    option values are: 0, 1, on, off.  (default: on)
> > 
> > CC: Ben Widawsky <ben at bwidawsk.net>

FYI, this patch if for Ben, so he can deterministically investigate
GPU hangs and stalls in Piglit runs.

> > Signed-off-by: Chad Versace <chad at chad-versace.us>
> 
> I could kind of go for another knob of "spawn in parallel up to number
> of CPUs, don't bother single-threading all the GPU tests."  Most of the
> time I'm testing, my driver should be reliable in the presence of other
> things using the GPU, right?  :)

Something like this?

./piglit-run.py -j1 # Use one thread, no concurrency.
./piglit-run.py -j9 # Use 9 threads.
./piglit-run.py -j  # Set number of threads to number of cpus.

I'm open to any suggestions here.

> (And, of course, testing is CPU-bound not GPU-bound in general)
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----
Chad Versace
chad at chad-versace.us