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drm/i915/selftests: Measure basic throughput of blit routines 

We need to verify that our blitter routines perform as expected, so
measure it.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Matthew Auld <matthew.auld@intel.com>
Reviewed-by: Matthew Auld <matthew.auld@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20191028112207.5464-1-chris@chris-wilson.co.uk
This commit is contained in:
Chris Wilson 2019-10-28 11:22:07 +00:00
parent 1d581dc3f5
commit 39f9547a33
1 changed files with 172 additions and 0 deletions
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172
drivers/gpu/drm/i915/gem/selftests/i915_gem_object_blt.c
View File

@ -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),
};