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igt/gem_streaming_writes: Reorder src/dst to avoid executing on snooped

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During the streaming setup, we execute a dummy batch in order to bind
the objects into the GTT and query their offsets. For this, we should
not use a snooped buffer for the dummy batch, or else we may anger the
GPU. Given that we have a choice, use the other buffer for the dummy
batch.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
This commit is contained in:
Chris Wilson 2015-06-03 13:57:21 +01:00
parent 85ee6e7b36
commit a5a6d40ca8
1 changed files with 21 additions and 20 deletions
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41
tests/gem_streaming_writes.c
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@ -60,6 +60,15 @@ static bool __gem_execbuf(int fd, struct drm_i915_gem_execbuffer2 *eb)
return drmIoctl(fd, DRM_IOCTL_I915_GEM_EXECBUFFER2, eb) == 0;
}
#define SRC 0
#define DST 1
#define BATCH 2
#define src exec[SRC].handle
#define src_offset exec[SRC].offset
#define dst exec[DST].handle
#define dst_offset exec[DST].offset
static void test_streaming(int fd, int mode, int sync)
{
const int has_64bit_reloc = intel_gen(intel_get_drm_devid(fd)) >= 8;
@ -77,13 +86,9 @@ static void test_streaming(int fd, int mode, int sync)
int i, n;
memset(exec, 0, sizeof(exec));
exec[0].handle = gem_create(fd, OBJECT_SIZE);
exec[0].flags = EXEC_OBJECT_WRITE;
#define dst exec[0].handle
#define dst_offset exec[0].offset
exec[1].handle = gem_create(fd, OBJECT_SIZE);
#define src exec[1].handle
#define src_offset exec[1].offset
exec[SRC].handle = gem_create(fd, OBJECT_SIZE);
exec[DST].handle = gem_create(fd, OBJECT_SIZE);
exec[DST].flags = EXEC_OBJECT_WRITE;
switch (mode) {
case 0: /* cpu/snoop */
@ -102,14 +107,14 @@ static void test_streaming(int fd, int mode, int sync)
d = gem_mmap__cpu(fd, dst, 0, OBJECT_SIZE, PROT_READ);
igt_assert(d);
gem_write(fd, src, 0, tmp, sizeof(tmp));
gem_write(fd, dst, 0, tmp, sizeof(tmp));
memset(&execbuf, 0, sizeof(execbuf));
execbuf.buffers_ptr = (uintptr_t)exec;
execbuf.buffer_count = 2;
execbuf.flags = LOCAL_I915_EXEC_HANDLE_LUT;
if (!__gem_execbuf(fd, &execbuf)) {
execbuf.flags = 0;
gem_execbuf(fd, &execbuf);
igt_require(__gem_execbuf(fd, &execbuf) == 0);
}
/* We assume that the active objects are fixed to avoid relocations */
__src_offset = src_offset;
@ -119,7 +124,7 @@ static void test_streaming(int fd, int mode, int sync)
for (i = 0; i < 64; i++) {
reloc[2*i+0].offset = 64*i + 4 * sizeof(uint32_t);
reloc[2*i+0].delta = 0;
reloc[2*i+0].target_handle = execbuf.flags & LOCAL_I915_EXEC_HANDLE_LUT ? 0 : dst;
reloc[2*i+0].target_handle = execbuf.flags & LOCAL_I915_EXEC_HANDLE_LUT ? DST : dst;
reloc[2*i+0].presumed_offset = dst_offset;
reloc[2*i+0].read_domains = I915_GEM_DOMAIN_RENDER;
reloc[2*i+0].write_domain = I915_GEM_DOMAIN_RENDER;
@ -128,7 +133,7 @@ static void test_streaming(int fd, int mode, int sync)
if (has_64bit_reloc)
reloc[2*i+1].offset += sizeof(uint32_t);
reloc[2*i+1].delta = 0;
reloc[2*i+1].target_handle = execbuf.flags & LOCAL_I915_EXEC_HANDLE_LUT ? 1 : src;
reloc[2*i+1].target_handle = execbuf.flags & LOCAL_I915_EXEC_HANDLE_LUT ? SRC : src;
reloc[2*i+1].presumed_offset = src_offset;
reloc[2*i+1].read_domains = I915_GEM_DOMAIN_RENDER;
reloc[2*i+1].write_domain = 0;
@ -242,13 +247,9 @@ static void test_batch(int fd, int mode, int reverse)
uint32_t offset;
memset(exec, 0, sizeof(exec));
exec[0].handle = gem_create(fd, OBJECT_SIZE);
exec[0].flags = EXEC_OBJECT_WRITE;
#define dst exec[0].handle
#define dst_offset exec[0].offset
exec[1].handle = gem_create(fd, OBJECT_SIZE);
#define src exec[1].handle
#define src_offset exec[1].offset
exec[DST].handle = gem_create(fd, OBJECT_SIZE);
exec[DST].flags = EXEC_OBJECT_WRITE;
exec[SRC].handle = gem_create(fd, OBJECT_SIZE);
s = gem_mmap__wc(fd, src, 0, OBJECT_SIZE, PROT_READ | PROT_WRITE);
igt_assert(s);
@ -259,7 +260,7 @@ static void test_batch(int fd, int mode, int reverse)
memset(reloc, 0, sizeof(reloc));
reloc[0].offset = 4 * sizeof(uint32_t);
reloc[0].delta = 0;
reloc[0].target_handle = execbuf.flags & LOCAL_I915_EXEC_HANDLE_LUT ? 0 : dst;
reloc[0].target_handle = execbuf.flags & LOCAL_I915_EXEC_HANDLE_LUT ? DST : dst;
reloc[0].presumed_offset = dst_offset;
reloc[0].read_domains = I915_GEM_DOMAIN_RENDER;
reloc[0].write_domain = I915_GEM_DOMAIN_RENDER;
@ -268,7 +269,7 @@ static void test_batch(int fd, int mode, int reverse)
if (has_64bit_reloc)
reloc[1].offset += sizeof(uint32_t);
reloc[1].delta = 0;
reloc[1].target_handle = execbuf.flags & LOCAL_I915_EXEC_HANDLE_LUT ? 1 : src;
reloc[1].target_handle = execbuf.flags & LOCAL_I915_EXEC_HANDLE_LUT ? SRC : src;
reloc[1].presumed_offset = src_offset;
reloc[1].read_domains = I915_GEM_DOMAIN_RENDER;
reloc[1].write_domain = 0;