https://bugs.freedesktop.org/show_bug.cgi?id=90537
--- Comment #22 from Christian König deathsimple@vodafone.de --- (In reply to Mauro Rossi from comment #21)
Question (please be patient I'm not skilled as you are): could some of these problem due to multicore, hyperthreading or be cacheing related?
No, not at all. What we have here is a driver internal problem, completely unrelated to the number of CPU cores.