igt/gem_exec_gttfill: Avoid pwrite into busy handle

The goal of gem_exec_gttfill is to exercise execbuf under heavy GTT
pressure (by trying to execute more objects than may fit into the GTT).
We spread the same set of handles across different processes, with the
result that each would occasionally stall waiting for execution of an
unrelated batch, limiting the pressure we were applying. If we using a
steaming write via a WC pointer, we can avoid the serialisation penalty
and so submit faster.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>

0 files changed, 0 insertions, 0 deletions