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3 Commits

Author SHA1 Message Date
Chris Wilson
f5dd258cc7 igt/gem_streaming_writes: Build in a self-test 
Use the first pass to write all values prior to the initial execbuf to
verify that the copy itself is true. Subsequent passes then focus on
verifying that writing values whilst the GPU is reading from
neighbouring values is then correct.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
 2015-05-12 10:04:46 +01:00
Chris Wilson
357073c257 igt/gem_streaming_writes: Trim number of batch buffers allocated 
Reduce memory usage for batches by a factor of 64 - which we immediately
spend some of in increasing the stress.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
 2015-05-11 21:21:36 +01:00
Chris Wilson
672238dbf7 igt: Add gem_streaming_writes 
This tries to replicate the missing barrier observed when using
asynchronous mmap(wc) on byt.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
 2015-05-11 16:19:12 +01:00