[Piglit] running with concurrency

[Tapani Pälli]

Hello;

I'm seeing errors when running piglit tests without "--no-concurrency" 
almost all the time. Below is the error log, I wonder if anyone else is 
seeing these? I've tested on 2 different systems (both running fc20) and 
I'm getting these errors on both.

--- 8< ---
[tpalli at localhost piglit]$ ./piglit-run.py tests/quick.tests 
results/quick.results
close failed in file object destructor:ss: 4096, skip: 2104, warn: 1 
Running Test(s): 05328 07320 07464 07473 07481 07482 07484 07485 07486
IOError: [Errno 9] Bad file descriptorass: 4097, skip: 2104, warn: 1 
Running Test(s): 05328 07320 07473 07486 07487 07488 07489 07490 07491
[16620/16621] crash: 2734, fail: 167, pass: 9182, skip: 4534, warn: 3 
Running Test(s): 166201281 01408 01409 01420 01423 01431 01432 0444026
Thank you for running Piglit!
Results have been written to 
/home/tpalli/sc/fdo/piglit/results/quick.results/main
^C0789/16621] crash: 1837, fail: 45, pass: 5844, skip: 3061, warn: 2 
Running Test(s): 01095 01281 01408 01409 01420 01423 01431 01432 1079720 
01423 01431 01432 04441
--- 8< ---

There's some IO errors (from Python I guess) + some threads keep happily 
on going after the 'Thank you'. Running with "--no-concurrency" runs 
reliably and fine. Any tips how to debug where things are going wrong?

// Tapani