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igt/gem_exec_flush: Stress a few more synchronisation paths for execbuf

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Look at handling of multiple batches within the buffer and avoiding as
much synchronisation as possible.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
This commit is contained in:
Chris Wilson 2016-05-03 17:03:49 +01:00
parent ec83ef9167
commit 7b7503fb6c
1 changed files with 39 additions and 23 deletions
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62
tests/gem_exec_flush.c
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@ -240,7 +240,7 @@ enum batch_mode {
BATCH_WC, BATCH_WC,
}; };
static void batch(int fd, unsigned ring, int nchild, int timeout, static void batch(int fd, unsigned ring, int nchild, int timeout,
enum batch_mode mode) enum batch_mode mode, unsigned flags)
{ {
const int gen = intel_gen(intel_get_drm_devid(fd)); const int gen = intel_gen(intel_get_drm_devid(fd));
@ -258,6 +258,7 @@ static void batch(int fd, unsigned ring, int nchild, int timeout,
obj[0].handle = gem_create(fd, 4096); obj[0].handle = gem_create(fd, 4096);
obj[0].flags |= EXEC_OBJECT_WRITE; obj[0].flags |= EXEC_OBJECT_WRITE;
gem_set_caching(fd, obj[0].handle, !!(flags & COHERENT));
map = gem_mmap__cpu(fd, obj[0].handle, 0, 4096, PROT_WRITE); map = gem_mmap__cpu(fd, obj[0].handle, 0, 4096, PROT_WRITE);
gem_set_domain(fd, obj[0].handle, gem_set_domain(fd, obj[0].handle,
@ -273,7 +274,7 @@ static void batch(int fd, unsigned ring, int nchild, int timeout,
if (gen < 6) if (gen < 6)
execbuf.flags |= I915_EXEC_SECURE; execbuf.flags |= I915_EXEC_SECURE;
obj[1].handle = gem_create(fd, 4096); obj[1].handle = gem_create(fd, 64<<10);
gem_write(fd, obj[1].handle, 0, &bbe, sizeof(bbe)); gem_write(fd, obj[1].handle, 0, &bbe, sizeof(bbe));
igt_require(__gem_execbuf(fd, &execbuf) == 0); igt_require(__gem_execbuf(fd, &execbuf) == 0);
@ -283,38 +284,40 @@ static void batch(int fd, unsigned ring, int nchild, int timeout,
switch (mode) { switch (mode) {
case BATCH_CPU: case BATCH_CPU:
case BATCH_USER: case BATCH_USER:
ptr = gem_mmap__cpu(fd, obj[1].handle, 0, 4096, ptr = gem_mmap__cpu(fd, obj[1].handle, 0, 64<<10,
PROT_WRITE); PROT_WRITE);
break; break;
case BATCH_WC: case BATCH_WC:
ptr = gem_mmap__wc(fd, obj[1].handle, 0, 4096, ptr = gem_mmap__wc(fd, obj[1].handle, 0, 64<<10,
PROT_WRITE); PROT_WRITE);
break; break;
case BATCH_GTT: case BATCH_GTT:
ptr = gem_mmap__gtt(fd, obj[1].handle, 4096, ptr = gem_mmap__gtt(fd, obj[1].handle, 64<<10,
PROT_WRITE); PROT_WRITE);
break; break;
case BATCH_KERNEL: case BATCH_KERNEL:
ptr = mmap(0, 4096, PROT_WRITE, ptr = mmap(0, 64<<10, PROT_WRITE,
MAP_PRIVATE | MAP_ANON, -1, 0); MAP_PRIVATE | MAP_ANON, -1, 0);
break; break;
} }
memset(&reloc, 0, sizeof(reloc)); memset(&reloc, 0, sizeof(reloc));
reloc.presumed_offset = obj[0].offset;
reloc.offset = sizeof(uint32_t);
if (gen >= 4 && gen < 8)
reloc.offset += sizeof(uint32_t);
reloc.read_domains = I915_GEM_DOMAIN_INSTRUCTION; reloc.read_domains = I915_GEM_DOMAIN_INSTRUCTION;
reloc.write_domain = I915_GEM_DOMAIN_INSTRUCTION; reloc.write_domain = I915_GEM_DOMAIN_INSTRUCTION;
igt_timeout(timeout) { igt_timeout(timeout) {
execbuf.batch_start_offset = 0;
reloc.offset = sizeof(uint32_t);
if (gen >= 4 && gen < 8)
reloc.offset += sizeof(uint32_t);
for (i = 0; i < 1024; i++) { for (i = 0; i < 1024; i++) {
uint64_t offset; uint64_t offset;
uint32_t *b = ptr; uint32_t *start = &ptr[execbuf.batch_start_offset/sizeof(*start)];
uint32_t *b = start;
switch (mode) { switch (mode) {
case BATCH_CPU: case BATCH_CPU:
@ -329,13 +332,11 @@ static void batch(int fd, unsigned ring, int nchild, int timeout,
break; break;
case BATCH_USER: case BATCH_USER:
gem_sync(fd, obj[1].handle);
break;
case BATCH_KERNEL: case BATCH_KERNEL:
break; break;
} }
reloc.presumed_offset = obj[0].offset;
reloc.delta = i * sizeof(uint32_t); reloc.delta = i * sizeof(uint32_t);
offset = reloc.presumed_offset + reloc.delta; offset = reloc.presumed_offset + reloc.delta;
@ -355,12 +356,13 @@ static void batch(int fd, unsigned ring, int nchild, int timeout,
switch (mode) { switch (mode) {
case BATCH_KERNEL: case BATCH_KERNEL:
gem_write(fd, obj[1].handle, 0, gem_write(fd, obj[1].handle,
ptr, (b - ptr) * sizeof(uint32_t)); execbuf.batch_start_offset,
start, (b - start) * sizeof(uint32_t));
break; break;
case BATCH_USER: case BATCH_USER:
igt_clflush_range(ptr, (b - ptr) * sizeof(uint32_t)); igt_clflush_range(start, (b - start) * sizeof(uint32_t));
break; break;
case BATCH_CPU: case BATCH_CPU:
@ -370,19 +372,28 @@ static void batch(int fd, unsigned ring, int nchild, int timeout,
} }
gem_execbuf(fd, &execbuf); gem_execbuf(fd, &execbuf);
cycles++; cycles++;
execbuf.batch_start_offset += 64;
reloc.offset += 64;
} }
gem_set_domain(fd, obj[0].handle, if (!(flags & COHERENT)) {
I915_GEM_DOMAIN_CPU, gem_set_domain(fd, obj[0].handle,
I915_GEM_DOMAIN_CPU); I915_GEM_DOMAIN_CPU,
I915_GEM_DOMAIN_CPU);
} else
gem_sync(fd, obj[0].handle);
for (i = 0; i < 1024; i++) { for (i = 0; i < 1024; i++) {
igt_assert_eq(map[i], i); igt_assert_eq(map[i], i);
map[i] = 0xabcdabcd; map[i] = 0xabcdabcd;
} }
if (mode == BATCH_USER)
gem_sync(fd, obj[1].handle);
} }
igt_info("Child[%d]: %lu cycles\n", child, cycles); igt_info("Child[%d]: %lu cycles\n", child, cycles);
munmap(ptr, 4096); munmap(ptr, 64<<10);
gem_close(fd, obj[1].handle); gem_close(fd, obj[1].handle);
munmap(map, 4096); munmap(map, 4096);
@ -442,11 +453,16 @@ igt_main
} }
for (const struct batch *b = batches; b->name; b++) { for (const struct batch *b = batches; b->name; b++) {
igt_subtest_f("%sbatch-%s-%s", igt_subtest_f("%sbatch-%s-%s-uc",
e->exec_id == 0 ? "basic-" : "", e->exec_id == 0 ? "basic-" : "",
b->name, b->name,
e->name) e->name)
batch(fd, ring, ncpus, timeout, b->mode); batch(fd, ring, ncpus, timeout, b->mode, 0);
igt_subtest_f("%sbatch-%s-%s-wb",
e->exec_id == 0 ? "basic-" : "",
b->name,
e->name)
batch(fd, ring, ncpus, timeout, b->mode, COHERENT);
} }
for (const struct mode *m = modes; m->name; m++) { for (const struct mode *m = modes; m->name; m++) {