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igt/gem_ringfill: Avoid CPU -> GTT -> CPU transition

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Avoid the second pair of full clflushes when setting up the batch.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
This commit is contained in:
Chris Wilson 2016-05-03 08:37:54 +01:00
parent 3edaa1d347
commit d654aa0d09
1 changed files with 6 additions and 5 deletions
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11
tests/gem_ringfill.c
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@ -103,17 +103,18 @@ static void run_test(int fd, unsigned ring, unsigned flags)
memset(&execbuf, 0, sizeof(execbuf));
execbuf.buffers_ptr = (uintptr_t)obj;
execbuf.buffer_count = 2;
execbuf.flags = ring | (1 << 11);
execbuf.flags = ring | (1 << 11) | (1 << 12);
if (gen < 6)
execbuf.flags |= I915_EXEC_SECURE;
memset(obj, 0, sizeof(obj));
obj[0].handle = gem_create(fd, 4096);
gem_write(fd, obj[0].handle, 0, &bbe, sizeof(bbe));
execbuf.buffer_count = 1;
igt_require(__gem_execbuf(fd, &execbuf) == 0);
obj[0].flags |= EXEC_OBJECT_WRITE;
obj[1].handle = gem_create(fd, 1024*16 + 4096);
gem_write(fd, obj[1].handle, 0, &bbe, sizeof(bbe));
igt_require(__gem_execbuf(fd, &execbuf) == 0);
obj[1].relocs_ptr = (uintptr_t)reloc;
obj[1].relocation_count = 1024;
@ -128,7 +129,6 @@ static void run_test(int fd, unsigned ring, unsigned flags)
for (i = 0; i < 1024; i++) {
uint64_t offset;
reloc[i].target_handle = obj[0].handle;
reloc[i].presumed_offset = obj[0].offset;
reloc[i].offset = (b - batch + 1) * sizeof(*batch);
reloc[i].delta = i * sizeof(uint32_t);
@ -152,6 +152,7 @@ static void run_test(int fd, unsigned ring, unsigned flags)
}
*b++ = MI_BATCH_BUFFER_END;
munmap(batch, 16*1024+4096);
execbuf.buffer_count = 2;
gem_execbuf(fd, &execbuf);
check_bo(fd, obj[0].handle);