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| author | Matthew Auld <matthew.auld@intel.com> | 2017-10-07 01:18:30 +0300 |
|---|---|---|
| committer | Chris Wilson <chris@chris-wilson.co.uk> | 2017-10-07 12:12:03 +0300 |
| commit | 7924d9d4dc9ffff32bf099db8c638e11e5457cd7 (patch) | |
| tree | 9bdc6cd0c859f2fde038e9d68c92329e180ed027 | |
| parent | 4049866f0913110bf7de597c1177de7a1cc459cb (diff) | |
| download | linux-7924d9d4dc9ffff32bf099db8c638e11e5457cd7.tar.xz | |
drm/i915/selftests: mix huge pages
Try to mix sg page sizes for 4K, 64K and 2M pages.
v2: s/BIT(x) >> 12/BIT(x) >> PAGE_SHIFT/
Suggested-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Matthew Auld <matthew.auld@intel.com>
Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Link: https://patchwork.freedesktop.org/patch/msgid/20171006145041.21673-19-matthew.auld@intel.com
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Link: https://patchwork.freedesktop.org/patch/msgid/20171006221833.32439-18-chris@chris-wilson.co.uk
| -rw-r--r-- | drivers/gpu/drm/i915/selftests/scatterlist.c | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/selftests/scatterlist.c b/drivers/gpu/drm/i915/selftests/scatterlist.c index 1cc5d2931753..cd6d2a16071f 100644 --- a/drivers/gpu/drm/i915/selftests/scatterlist.c +++ b/drivers/gpu/drm/i915/selftests/scatterlist.c @@ -189,6 +189,20 @@ static unsigned int random(unsigned long n, return 1 + (prandom_u32_state(rnd) % 1024); } +static unsigned int random_page_size_pages(unsigned long n, + unsigned long count, + struct rnd_state *rnd) +{ + /* 4K, 64K, 2M */ + static unsigned int page_count[] = { + BIT(12) >> PAGE_SHIFT, + BIT(16) >> PAGE_SHIFT, + BIT(21) >> PAGE_SHIFT, + }; + + return page_count[(prandom_u32_state(rnd) % 3)]; +} + static inline bool page_contiguous(struct page *first, struct page *last, unsigned long npages) @@ -252,6 +266,7 @@ static const npages_fn_t npages_funcs[] = { grow, shrink, random, + random_page_size_pages, NULL, }; |