We need to verify that our blitter routines perform as expected, so
measure it.
Signed-off-by: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx>
Cc: Matthew Auld <matthew.auld@xxxxxxxxx>
Reviewed-by: Matthew Auld <matthew.auld@xxxxxxxxx>
---
.../i915/gem/selftests/i915_gem_object_blt.c | 172 ++++++++++++++++++
1 file changed, 172 insertions(+)
diff --git a/drivers/gpu/drm/i915/gem/selftests/i915_gem_object_blt.c b/drivers/gpu/drm/i915/gem/selftests/i915_gem_object_blt.c
index 9666c0aeb6de..ac40c704514e 100644
--- a/drivers/gpu/drm/i915/gem/selftests/i915_gem_object_blt.c
+++ b/drivers/gpu/drm/i915/gem/selftests/i915_gem_object_blt.c
@@ -3,7 +3,10 @@
* Copyright © 2019 Intel Corporation
*/
+#include <linux/sort.h>
+
#include "gt/intel_gt.h"
+#include "gt/intel_engine_user.h"
#include "i915_selftest.h"
@@ -14,6 +17,173 @@
#include "huge_gem_object.h"
#include "mock_context.h"
+static int wrap_ktime_compare(const void *A, const void *B)
+{
+ const ktime_t *a = A, *b = B;
+
+ return ktime_compare(*a, *b);
+}
+
+static int __perf_fill_blt(struct drm_i915_gem_object *obj)
+{
+ struct drm_i915_private *i915 = to_i915(obj->base.dev);
+ int inst = 0;
+
+ do {
+ struct intel_engine_cs *engine;
+ ktime_t t[5];
+ int pass;
+ int err;
+
+ engine = intel_engine_lookup_user(i915,
+ I915_ENGINE_CLASS_COPY,
+ inst++);
+ if (!engine)
+ return 0;
+
+ for (pass = 0; pass < ARRAY_SIZE(t); pass++) {
+ struct intel_context *ce = engine->kernel_context;
+ ktime_t t0, t1;
+
+ t0 = ktime_get();
+
+ err = i915_gem_object_fill_blt(obj, ce, 0);
+ if (err)
+ return err;
+
+ err = i915_gem_object_wait(obj,
+ I915_WAIT_ALL,
+ MAX_SCHEDULE_TIMEOUT);
+ if (err)
+ return err;
+
+ t1 = ktime_get();
+ t[pass] = ktime_sub(t1, t0);
+ }
+
+ sort(t, ARRAY_SIZE(t), sizeof(*t), wrap_ktime_compare, NULL);
+ pr_info("%s: blt %zd KiB fill: %lld MiB/s\n",
+ engine->name,
+ obj->base.size >> 10,
+ div64_u64(mul_u32_u32(4 * obj->base.size,
+ 1000 * 1000 * 1000),
+ t[1] + 2 * t[2] + t[3]) >> 20);
+ } while (1);
+}
+
+static int perf_fill_blt(void *arg)
+{
+ struct drm_i915_private *i915 = arg;
+ static const unsigned long sizes[] = {
+ SZ_4K,
+ SZ_64K,
+ SZ_2M,
+ SZ_64M
+ };
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(sizes); i++) {
+ struct drm_i915_gem_object *obj;
+ int err;
+
+ obj = i915_gem_object_create_internal(i915, sizes[i]);
+ if (IS_ERR(obj))
+ return PTR_ERR(obj);
+
+ err = __perf_fill_blt(obj);
+ i915_gem_object_put(obj);
+ if (err)
+ return err;
+ }
+
+ return 0;
+}
+
+static int __perf_copy_blt(struct drm_i915_gem_object *src,
+ struct drm_i915_gem_object *dst)
+{
+ struct drm_i915_private *i915 = to_i915(src->base.dev);
+ int inst = 0;
+
+ do {
+ struct intel_engine_cs *engine;
+ ktime_t t[5];
+ int pass;
+
+ engine = intel_engine_lookup_user(i915,
+ I915_ENGINE_CLASS_COPY,
+ inst++);
+ if (!engine)
+ return 0;
+
+ for (pass = 0; pass < ARRAY_SIZE(t); pass++) {
+ struct intel_context *ce = engine->kernel_context;
+ ktime_t t0, t1;
+ int err;
+
+ t0 = ktime_get();
+
+ err = i915_gem_object_copy_blt(src, dst, ce);
+ if (err)
+ return err;
+
+ err = i915_gem_object_wait(dst,
+ I915_WAIT_ALL,
+ MAX_SCHEDULE_TIMEOUT);
+ if (err)
+ return err;
+
+ t1 = ktime_get();
+ t[pass] = ktime_sub(t1, t0);
+ }
+
+ sort(t, ARRAY_SIZE(t), sizeof(*t), wrap_ktime_compare, NULL);
+ pr_info("%s: blt %zd KiB copy: %lld MiB/s\n",
+ engine->name,
+ src->base.size >> 10,
+ div64_u64(mul_u32_u32(4 * src->base.size,
+ 1000 * 1000 * 1000),
+ t[1] + 2 * t[2] + t[3]) >> 20);
+ } while (1);
+}
+
+static int perf_copy_blt(void *arg)
+{
+ struct drm_i915_private *i915 = arg;
+ static const unsigned long sizes[] = {
+ SZ_4K,
+ SZ_64K,
+ SZ_2M,
+ SZ_64M
+ };
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(sizes); i++) {
+ struct drm_i915_gem_object *src, *dst;
+ int err;
+
+ src = i915_gem_object_create_internal(i915, sizes[i]);
+ if (IS_ERR(src))
+ return PTR_ERR(src);
+
+ dst = i915_gem_object_create_internal(i915, sizes[i]);
+ if (IS_ERR(dst)) {
+ err = PTR_ERR(dst);
+ goto err_src;
+ }
+
+ err = __perf_copy_blt(src, dst);
+
+ i915_gem_object_put(dst);
+err_src:
+ i915_gem_object_put(src);
+ if (err)
+ return err;
+ }
+
+ return 0;
+}
+
struct igt_thread_arg {
struct drm_i915_private *i915;
struct rnd_state prng;
@@ -335,6 +505,8 @@ static int igt_copy_blt(void *arg)
int i915_gem_object_blt_live_selftests(struct drm_i915_private *i915)
{
static const struct i915_subtest tests[] = {
+ SUBTEST(perf_fill_blt),
+ SUBTEST(perf_copy_blt),
SUBTEST(igt_fill_blt),
SUBTEST(igt_copy_blt),
};
--
2.24.0.rc1
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