i915/gem_request_retire: Switch from random blitter loads to dummy

Use the spinners to provide exactly the right amount of background
busyness.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Tvrtko Ursulin <tvrtko.ursulin@linux.intel.com>
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@linux.intel.com>

3 files changed, 34 insertions, 160 deletions

diff --git a/lib/igt_dummyload.c b/lib/igt_dummyload.c
index d58f7310..891e4eaa 100644
--- a/lib/igt_dummyload.c
+++ b/lib/igt_dummyload.c
@@ -161,19 +161,20 @@ emit_recursive_batch(igt_spin_t *spin,
 	if (opts->dependency) {
 		igt_assert(!(opts->flags & IGT_SPIN_POLL_RUN));
 
-		r = &relocs[obj[BATCH].relocation_count++];
-
-		/* dummy write to dependency */
 		obj[SCRATCH].handle = opts->dependency;
 		obj[SCRATCH].offset = addr;
-		obj[SCRATCH].flags = EXEC_OBJECT_WRITE;
-
-		r->presumed_offset = obj[SCRATCH].offset;
-		r->target_handle = obj[SCRATCH].handle;
-		r->offset = sizeof(uint32_t) * 1020;
-		r->delta = 0;
-		r->read_domains = I915_GEM_DOMAIN_RENDER;
-		r->write_domain = I915_GEM_DOMAIN_RENDER;
+		if (!(opts->flags & IGT_SPIN_SOFTDEP)) {
+			obj[SCRATCH].flags = EXEC_OBJECT_WRITE;
+
+			/* dummy write to dependency */
+			r = &relocs[obj[BATCH].relocation_count++];
+			r->presumed_offset = obj[SCRATCH].offset;
+			r->target_handle = obj[SCRATCH].handle;
+			r->offset = sizeof(uint32_t) * 1020;
+			r->delta = 0;
+			r->read_domains = I915_GEM_DOMAIN_RENDER;
+			r->write_domain = I915_GEM_DOMAIN_RENDER;
+		}
 
 		execbuf->buffer_count++;
 	} else if (opts->flags & IGT_SPIN_POLL_RUN) {
diff --git a/lib/igt_dummyload.h b/lib/igt_dummyload.h
index 6d3e65ce..b8baaa6b 100644
--- a/lib/igt_dummyload.h
+++ b/lib/igt_dummyload.h
@@ -71,6 +71,7 @@ struct igt_spin_factory {
 #define IGT_SPIN_NO_PREEMPTION (1 << 4)
 #define IGT_SPIN_INVALID_CS    (1 << 5)
 #define IGT_SPIN_USERPTR       (1 << 6)
+#define IGT_SPIN_SOFTDEP       (1 << 7)
 
 igt_spin_t *
 __igt_spin_factory(int fd, const struct igt_spin_factory *opts);
diff --git a/tests/i915/gem_request_retire.c b/tests/i915/gem_request_retire.c
index 31fb4198..c23ddfb7 100644
--- a/tests/i915/gem_request_retire.c
+++ b/tests/i915/gem_request_retire.c
@@ -52,130 +52,6 @@
 IGT_TEST_DESCRIPTION("Collection of tests targeting request retirement code"
 		     " paths.");
 
-#define WIDTH 4096
-#define HEIGHT 4096
-#define BO_SIZE (WIDTH * HEIGHT * sizeof(uint32_t))
-
-static uint32_t
-blit(int fd, uint32_t dst, uint32_t src, uint32_t ctx_id)
-{
-	const unsigned int copies = 1000;
-	uint32_t batch[12 * copies + 5];
-	struct drm_i915_gem_relocation_entry reloc[2 * copies];
-	struct drm_i915_gem_exec_object2 obj[3];
-	struct drm_i915_gem_execbuffer2 exec;
-	uint32_t handle;
-	unsigned int i = 0, j, r = 0;
-
-	for (j = 0; j < copies; j++) {
-		reloc[r].target_handle = dst;
-		reloc[r].delta = 0;
-		reloc[r].offset = (i + 4) * sizeof(uint32_t);
-		reloc[r].presumed_offset = 0;
-		reloc[r].read_domains = I915_GEM_DOMAIN_RENDER;
-		reloc[r].write_domain = I915_GEM_DOMAIN_RENDER;
-
-		r++;
-
-		reloc[r].target_handle = src;
-		reloc[r].delta = 0;
-		reloc[r].offset = (i + 7) * sizeof(uint32_t);
-		if (intel_gen(intel_get_drm_devid(fd)) >= 8)
-			reloc[r].offset += sizeof(uint32_t);
-		reloc[r].presumed_offset = 0;
-		reloc[r].read_domains = I915_GEM_DOMAIN_RENDER;
-		reloc[r].write_domain = 0;
-
-		r++;
-
-		batch[i++] = XY_SRC_COPY_BLT_CMD |
-			XY_SRC_COPY_BLT_WRITE_ALPHA |
-			XY_SRC_COPY_BLT_WRITE_RGB;
-		if (intel_gen(intel_get_drm_devid(fd)) >= 8)
-			batch[i - 1] |= 8;
-		else
-			batch[i - 1] |= 6;
-
-		batch[i++] = (3 << 24) | /* 32 bits */
-			(0xcc << 16) | /* copy ROP */
-			WIDTH*4;
-		batch[i++] = 0; /* dst x1,y1 */
-		batch[i++] = (HEIGHT << 16) | WIDTH; /* dst x2,y2 */
-		batch[i++] = 0; /* dst reloc */
-		if (intel_gen(intel_get_drm_devid(fd)) >= 8)
-			batch[i++] = 0;
-		batch[i++] = 0; /* src x1,y1 */
-		batch[i++] = WIDTH*4;
-		batch[i++] = 0; /* src reloc */
-		if (intel_gen(intel_get_drm_devid(fd)) >= 8)
-			batch[i++] = 0;
-	}
-
-	batch[i++] = MI_BATCH_BUFFER_END;
-
-	while (i % 4)
-		batch[i++] = MI_NOOP;
-
-	handle = gem_create(fd, sizeof(batch));
-	gem_write(fd, handle, 0, batch, sizeof(batch));
-
-	memset(obj, 0, sizeof(obj));
-	memset(&exec, 0, sizeof(exec));
-
-	obj[exec.buffer_count++].handle = dst;
-	if (src != dst)
-		obj[exec.buffer_count++].handle = src;
-	obj[exec.buffer_count].handle = handle;
-	obj[exec.buffer_count].relocation_count = 2 * copies;
-	obj[exec.buffer_count].relocs_ptr = to_user_pointer(reloc);
-	exec.buffer_count++;
-	exec.buffers_ptr = to_user_pointer(obj);
-
-	exec.batch_len = i * sizeof(uint32_t);
-	exec.flags = I915_EXEC_BLT;
-	i915_execbuffer2_set_context_id(exec, ctx_id);
-
-	gem_execbuf(fd, &exec);
-
-	return handle;
-}
-
-static uint32_t
-noop(int fd, uint32_t src, uint32_t ctx_id)
-{
-	uint32_t batch[4];
-	struct drm_i915_gem_exec_object2 obj[2];
-	struct drm_i915_gem_execbuffer2 exec;
-	uint32_t handle;
-	unsigned int i = 0;
-
-	batch[i++] = MI_NOOP;
-	batch[i++] = MI_BATCH_BUFFER_END;
-	batch[i++] = MI_NOOP;
-	batch[i++] = MI_NOOP;
-
-	handle = gem_create(fd, 4096);
-	gem_write(fd, handle, 0, batch, sizeof(batch));
-
-	memset(obj, 0, sizeof(obj));
-	memset(&exec, 0, sizeof(exec));
-
-	obj[exec.buffer_count++].handle = src;
-	obj[exec.buffer_count].handle = handle;
-	obj[exec.buffer_count].relocation_count = 0;
-	obj[exec.buffer_count].relocs_ptr = to_user_pointer(0);
-	exec.buffer_count++;
-	exec.buffers_ptr = to_user_pointer(obj);
-
-	exec.batch_len = i * sizeof(uint32_t);
-	exec.flags = I915_EXEC_RENDER;
-	i915_execbuffer2_set_context_id(exec, ctx_id);
-
-	gem_execbuf(fd, &exec);
-
-	return handle;
-}
-
 /*
  * A single bo is operated from batchbuffers submitted from two contexts and on
  * different rings.
@@ -185,37 +61,33 @@ noop(int fd, uint32_t src, uint32_t ctx_id)
 static void
 test_retire_vma_not_inactive(int fd)
 {
-	uint32_t ctx_id;
-	uint32_t src, dst;
-	uint32_t blit_bb, noop_bb;
-
-	igt_require(HAS_BLT_RING(intel_get_drm_devid(fd)));
+	struct intel_execution_engine2 *e;
 
-	ctx_id = gem_context_create(fd);
+	igt_spin_t *bg = NULL;
 
-	/* Create some bos batch buffers will operate on. */
-	src = gem_create(fd, BO_SIZE);
-	dst = gem_create(fd, BO_SIZE);
+	__for_each_physical_engine(fd, e) {
+		igt_spin_t *spin;
+		uint32_t ctx;
 
-	/* Submit a long running batch. */
-	blit_bb = blit(fd, dst, src, 0);
+		if (!bg) {
+			bg = igt_spin_new(fd, .engine = e->flags);
+			continue;
+		}
 
-	/* Submit a quick batch referencing the same object. */
-	noop_bb = noop(fd, src, ctx_id);
+		ctx = gem_context_clone_with_engines(fd, 0);
+		spin = igt_spin_new(fd, ctx,
+				    .engine = e->flags,
+				    .dependency = bg->handle,
+				    .flags = IGT_SPIN_SOFTDEP);
+		gem_context_destroy(fd, ctx);
+		igt_spin_end(spin);
 
-	/* Wait for the quick batch to complete. */
-	gem_sync(fd, noop_bb);
-	gem_close(fd, noop_bb);
-
-	/* Now destroy the context in which the quick batch was submitted. */
-	gem_context_destroy(fd, ctx_id);
-
-	/* Wait for the slow batch to finish and clean up. */
-	gem_sync(fd, blit_bb);
-	gem_close(fd, blit_bb);
+		gem_sync(fd, spin->handle);
+		igt_spin_free(fd, spin);
+	}
 
-	gem_close(fd, src);
-	gem_close(fd, dst);
+	igt_drop_caches_set(fd, DROP_RETIRE);
+	igt_spin_free(fd, bg);
 }
 
 int fd;