[Intel-gfx] [PATCH 6/6] drm/i915/selftests: prefer random sizes for the huge-GTT-page smoke tests
Matthew Auld
matthew.auld at intel.com
Fri Oct 18 16:55:58 UTC 2019
Ditch the dubious static list of sizes to enumerate, in favour of
choosing a random size within the limits of each backing store. With
repeated CI runs this should give us a wider range of object sizes, and
in turn more page-size combinations, while using less machine time.
Signed-off-by: Matthew Auld <matthew.auld at intel.com>
---
.../gpu/drm/i915/gem/selftests/huge_pages.c | 198 +++++++++---------
1 file changed, 94 insertions(+), 104 deletions(-)
diff --git a/drivers/gpu/drm/i915/gem/selftests/huge_pages.c b/drivers/gpu/drm/i915/gem/selftests/huge_pages.c
index d4892769b739..3f7ac4473f33 100644
--- a/drivers/gpu/drm/i915/gem/selftests/huge_pages.c
+++ b/drivers/gpu/drm/i915/gem/selftests/huge_pages.c
@@ -1314,20 +1314,33 @@ static int igt_ppgtt_exhaust_huge(void *arg)
return err;
}
+static u32 igt_random_size(struct rnd_state *prng,
+ u32 min_page_size,
+ u32 max_page_size)
+{
+ u32 size;
+ u32 mask;
+
+ GEM_BUG_ON(!is_power_of_2(min_page_size));
+ GEM_BUG_ON(!is_power_of_2(max_page_size));
+ GEM_BUG_ON(min_page_size < PAGE_SIZE);
+ GEM_BUG_ON(min_page_size > max_page_size);
+
+ mask = GENMASK_ULL(ilog2(max_page_size), PAGE_SHIFT);
+ size = prandom_u32_state(prng) & mask;
+ if (size < min_page_size)
+ size |= min_page_size;
+
+ return size;
+}
+
static int igt_ppgtt_internal_huge(void *arg)
{
struct i915_gem_context *ctx = arg;
struct drm_i915_private *i915 = ctx->i915;
struct drm_i915_gem_object *obj;
- static const unsigned int sizes[] = {
- SZ_64K,
- SZ_128K,
- SZ_256K,
- SZ_512K,
- SZ_1M,
- SZ_2M,
- };
- int i;
+ I915_RND_STATE(prng);
+ u32 size;
int err;
/*
@@ -1335,42 +1348,36 @@ static int igt_ppgtt_internal_huge(void *arg)
* -- ensure that our writes land in the right place.
*/
- for (i = 0; i < ARRAY_SIZE(sizes); ++i) {
- unsigned int size = sizes[i];
-
- obj = i915_gem_object_create_internal(i915, size);
- if (IS_ERR(obj))
- return PTR_ERR(obj);
+ size = igt_random_size(&prng, SZ_64K, SZ_2M);
- err = i915_gem_object_pin_pages(obj);
- if (err)
- goto out_put;
-
- if (obj->mm.page_sizes.phys < I915_GTT_PAGE_SIZE_64K) {
- pr_info("internal unable to allocate huge-page(s) with size=%u\n",
- size);
- goto out_unpin;
- }
+ obj = i915_gem_object_create_internal(i915, size);
+ if (IS_ERR(obj))
+ return PTR_ERR(obj);
- err = igt_write_huge(ctx, obj);
- if (err) {
- pr_err("internal write-huge failed with size=%u\n",
- size);
- goto out_unpin;
- }
+ err = i915_gem_object_pin_pages(obj);
+ if (err)
+ goto out_put;
- i915_gem_object_unpin_pages(obj);
- __i915_gem_object_put_pages(obj, I915_MM_NORMAL);
- i915_gem_object_put(obj);
+ if (obj->mm.page_sizes.phys < I915_GTT_PAGE_SIZE_64K) {
+ pr_info("%s unable to allocate huge-page(s) with size=%u\n",
+ __func__, size);
+ err = -ENOMEM;
+ goto out_unpin;
}
- return 0;
+ err = igt_write_huge(ctx, obj);
+ if (err)
+ pr_err("%s write-huge failed with size=%u\n", __func__, size);
out_unpin:
i915_gem_object_unpin_pages(obj);
+ __i915_gem_object_put_pages(obj, I915_MM_NORMAL);
out_put:
i915_gem_object_put(obj);
+ if (err == -ENOMEM)
+ err = 0;
+
return err;
}
@@ -1384,14 +1391,8 @@ static int igt_ppgtt_gemfs_huge(void *arg)
struct i915_gem_context *ctx = arg;
struct drm_i915_private *i915 = ctx->i915;
struct drm_i915_gem_object *obj;
- static const unsigned int sizes[] = {
- SZ_2M,
- SZ_4M,
- SZ_8M,
- SZ_16M,
- SZ_32M,
- };
- int i;
+ I915_RND_STATE(prng);
+ u32 size;
int err;
/*
@@ -1400,46 +1401,40 @@ static int igt_ppgtt_gemfs_huge(void *arg)
*/
if (!igt_can_allocate_thp(i915)) {
- pr_info("missing THP support, skipping\n");
+ pr_info("%s missing THP support, skipping\n", __func__);
return 0;
}
- for (i = 0; i < ARRAY_SIZE(sizes); ++i) {
- unsigned int size = sizes[i];
-
- obj = i915_gem_object_create_shmem(i915, size);
- if (IS_ERR(obj))
- return PTR_ERR(obj);
-
- err = i915_gem_object_pin_pages(obj);
- if (err)
- goto out_put;
+ size = igt_random_size(&prng, SZ_2M, SZ_32M);
- if (obj->mm.page_sizes.phys < I915_GTT_PAGE_SIZE_2M) {
- pr_info("finishing test early, gemfs unable to allocate huge-page(s) with size=%u\n",
- size);
- goto out_unpin;
- }
+ obj = i915_gem_object_create_shmem(i915, size);
+ if (IS_ERR(obj))
+ return PTR_ERR(obj);
- err = igt_write_huge(ctx, obj);
- if (err) {
- pr_err("gemfs write-huge failed with size=%u\n",
- size);
- goto out_unpin;
- }
+ err = i915_gem_object_pin_pages(obj);
+ if (err)
+ goto out_put;
- i915_gem_object_unpin_pages(obj);
- __i915_gem_object_put_pages(obj, I915_MM_NORMAL);
- i915_gem_object_put(obj);
+ if (obj->mm.page_sizes.phys < I915_GTT_PAGE_SIZE_2M) {
+ pr_info("%s finishing test early, gemfs unable to allocate huge-page(s) with size=%u\n",
+ __func__, size);
+ err = -ENOMEM;
+ goto out_unpin;
}
- return 0;
+ err = igt_write_huge(ctx, obj);
+ if (err)
+ pr_err("%s write-huge failed with size=%u\n", __func__, size);
out_unpin:
i915_gem_object_unpin_pages(obj);
+ __i915_gem_object_put_pages(obj, I915_MM_NORMAL);
out_put:
i915_gem_object_put(obj);
+ if (err == -ENOMEM)
+ err = 0;
+
return err;
}
@@ -1448,13 +1443,8 @@ static int igt_ppgtt_lmem_huge(void *arg)
struct i915_gem_context *ctx = arg;
struct drm_i915_private *i915 = ctx->i915;
struct drm_i915_gem_object *obj;
- static const unsigned int sizes[] = {
- SZ_64K,
- SZ_512K,
- SZ_1M,
- SZ_2M,
- };
- int i;
+ I915_RND_STATE(prng);
+ u32 size;
int err;
if (!HAS_LMEM(i915)) {
@@ -1467,49 +1457,49 @@ static int igt_ppgtt_lmem_huge(void *arg)
* -- ensure that our writes land in the right place.
*/
- for (i = 0; i < ARRAY_SIZE(sizes); ++i) {
- unsigned int size = sizes[i];
-
- obj = i915_gem_object_create_lmem(i915, size, I915_BO_ALLOC_CONTIGUOUS);
- if (IS_ERR(obj)) {
- err = PTR_ERR(obj);
- if (err == -E2BIG) {
- pr_info("object too big for region!\n");
- return 0;
- }
+ size = SZ_1G;
+try_again:
+ size = igt_random_size(&prng, SZ_64K, rounddown_pow_of_two(size));
- return err;
+ obj = i915_gem_object_create_lmem(i915, size, 0);
+ if (IS_ERR(obj)) {
+ err = PTR_ERR(obj);
+ if (err == -E2BIG) {
+ size >>= 1;
+ goto try_again;
}
- err = i915_gem_object_pin_pages(obj);
- if (err)
- goto out_put;
-
- if (obj->mm.page_sizes.phys < I915_GTT_PAGE_SIZE_64K) {
- pr_info("LMEM unable to allocate huge-page(s) with size=%u\n",
- size);
- goto out_unpin;
- }
+ return err;
+ }
- err = igt_write_huge(ctx, obj);
- if (err) {
- pr_err("LMEM write-huge failed with size=%u\n", size);
- goto out_unpin;
+ err = i915_gem_object_pin_pages(obj);
+ if (err) {
+ if (err == -ENXIO) {
+ i915_gem_object_put(obj);
+ size >>= 1;
+ goto try_again;
}
+ goto out_put;
+ }
- i915_gem_object_unpin_pages(obj);
- __i915_gem_object_put_pages(obj, I915_MM_NORMAL);
- i915_gem_object_put(obj);
+ if (obj->mm.page_sizes.phys < I915_GTT_PAGE_SIZE_64K) {
+ pr_info("%s unable to allocate huge-page(s) with size=%u\n",
+ __func__, size);
+ err = -ENOMEM;
+ goto out_unpin;
}
- return 0;
+ err = igt_write_huge(ctx, obj);
+ if (err)
+ pr_err("%s write-huge failed with size=%u\n", __func__, size);
out_unpin:
i915_gem_object_unpin_pages(obj);
+ __i915_gem_object_put_pages(obj, I915_MM_NORMAL);
out_put:
i915_gem_object_put(obj);
- if (err == -ENOMEM)
+ if (err == -ENOMEM || err == -ENXIO)
err = 0;
return err;
--
2.20.1
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