[Intel-gfx] [igt-dev] [PATCH i-g-t 1/2] tests/gem_exec_await: Relax the busy spinner

[Chris Wilson]

Quoting Tvrtko Ursulin (2018-11-19 15:22:28)
> From: Tvrtko Ursulin <tvrtko.ursulin at intel.com>
> 
> Add some nop instructions between recursive batch buffer start calls to
> give system some breathing room. Without these, especially when coupled
> with memory pressure, false GPU hangs can be observed caused by the
> inability of the chip to cope.

Doesn't seem to be required. And the machines most susceptible to timer
errors due to busyspin have not show the issue.
-Chris