igt/gem_fence_thrash: Use streaming reads for verify

At the moment, the verify tests use an extremely brutal write-read of
every dword, degrading performance to UC. If we break those up into
cachelines, we can do a wcb write/read at a time instead, roughly 8x
faster. We lose the accuracy of the forced wcb flushes around every dword,
but we are retaining the overall behaviour of checking reads following
writes instead. To compensate, we do check that a single dword write/read
before using wcb aligned accesses.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>

0 files changed, 0 insertions, 0 deletions