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igt/gem_streaming_writes: Build in a self-test

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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>
This commit is contained in:
Chris Wilson 2015-05-12 10:02:59 +01:00
parent a5a010c82d
commit f5dd258cc7
1 changed files with 9 additions and 2 deletions
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11
tests/gem_streaming_writes.c
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@ -171,12 +171,19 @@ static void test_streaming(int fd, int mode)
int domain = mode ? I915_GEM_DOMAIN_GTT : I915_GEM_DOMAIN_CPU;
gem_set_domain(fd, src, domain, domain);
if (pass == 0) {
for (i = 0; i < OBJECT_SIZE/4; i++)
s[i] = i;
}
/* Now copy from the src to the dst in 32byte chunks */
for (offset = 0; offset < OBJECT_SIZE; offset += CHUNK_SIZE) {
int b;
for (i = 0; i < CHUNK_SIZE/4; i++)
s[offset/4 + i] = (OBJECT_SIZE*pass + offset)/4 + i;
if (pass) {
for (i = 0; i < CHUNK_SIZE/4; i++)
s[offset/4 + i] = (OBJECT_SIZE*pass + offset)/4 + i;
}
b = offset / CHUNK_SIZE / 64;
n = offset / CHUNK_SIZE % 64;