copy_blit operation works only on integral number of pages so benchmarks shorter than one page size (4K) do not make sense
v2: use RADEON_GPU_PAGE_SIZE instead of "magic" 1024 number and sweep sizes between 1 * <page_size> to 16K * <page_size> doubling the size in each iteration; we get the same coverage, as in the original benchmark, but guarantee integer multiples of page size
v3: add whitespace between '*' operator per review received from zajec5@gmail.com
Signed-off-by: Ilija Hadzic ihadzic@research.bell-labs.com --- drivers/gpu/drm/radeon/radeon_benchmark.c | 12 ++++++------ 1 files changed, 6 insertions(+), 6 deletions(-)
diff --git a/drivers/gpu/drm/radeon/radeon_benchmark.c b/drivers/gpu/drm/radeon/radeon_benchmark.c index 815f234..58cee89 100644 --- a/drivers/gpu/drm/radeon/radeon_benchmark.c +++ b/drivers/gpu/drm/radeon/radeon_benchmark.c @@ -208,22 +208,22 @@ void radeon_benchmark(struct radeon_device *rdev, int test_number) break; case 3: /* GTT to VRAM, buffer size sweep, powers of 2 */ - for (i = 1; i <= 65536; i <<= 1) - radeon_benchmark_move(rdev, i*1024, + for (i = 1; i <= 16384; i <<= 1) + radeon_benchmark_move(rdev, i * RADEON_GPU_PAGE_SIZE, RADEON_GEM_DOMAIN_GTT, RADEON_GEM_DOMAIN_VRAM); break; case 4: /* VRAM to GTT, buffer size sweep, powers of 2 */ - for (i = 1; i <= 65536; i <<= 1) - radeon_benchmark_move(rdev, i*1024, + for (i = 1; i <= 16384; i <<= 1) + radeon_benchmark_move(rdev, i * RADEON_GPU_PAGE_SIZE, RADEON_GEM_DOMAIN_VRAM, RADEON_GEM_DOMAIN_GTT); break; case 5: /* VRAM to VRAM, buffer size sweep, powers of 2 */ - for (i = 1; i <= 65536; i <<= 1) - radeon_benchmark_move(rdev, i*1024, + for (i = 1; i <= 16384; i <<= 1) + radeon_benchmark_move(rdev, i * RADEON_GPU_PAGE_SIZE, RADEON_GEM_DOMAIN_VRAM, RADEON_GEM_DOMAIN_VRAM); break;