drm/i915: Replace PIN_NONFAULT with calls to PIN_NOEVICT

Browse source

When under severe stress for GTT mappable space, the LRU eviction model
falls off a cliff. We spend all our time scanning the much larger
non-mappable area searching for something within the mappable zone we can
evict. Turn this on its head by only using the full vma for the object if
it is already pinned in the mappable zone or there is sufficient *free*
space to accommodate it (prioritizing speedy reuse). If there is not,
immediately fall back to using small chunks (tilerow for GTT mmap, single
pages for pwrite/relocation) and using random eviction before doing a full
search.

Testcase: igt/gem_concurrent_blt
References: https://bugs.freedesktop.org/show_bug.cgi?id=110848
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Matthew Auld <matthew.auld@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190821123234.19194-1-chris@chris-wilson.co.uk

...

This commit is contained in:

Chris Wilson 2019-08-21 13:32:34 +01:00

parent 783877458f

commit 6846895fde

6 changed files with 18 additions and 22 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

4

drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c

View file

8

drivers/gpu/drm/i915/gem/i915_gem_mman.c

View file

8

drivers/gpu/drm/i915/i915_gem.c

View file

8

drivers/gpu/drm/i915/i915_gem_evict.c

View file

6

drivers/gpu/drm/i915/i915_gem_gtt.c

View file

6

drivers/gpu/drm/i915/i915_gem_gtt.h

View file