diff options
| author | Chris Wilson <chris@chris-wilson.co.uk> | 2017-02-15 08:43:40 +0000 |
|---|---|---|
| committer | Chris Wilson <chris@chris-wilson.co.uk> | 2017-02-15 10:07:18 +0000 |
| commit | 8448661d65f6f5dbcdb9c5cba185b284f2464b65 (patch) | |
| tree | 9f9d49a7e58323b08f26d2633fb0c3b2a83c682b /drivers/gpu/drm/i915/selftests | |
| parent | cbc4e9e6a6d31fcc44921d2be41104425be8ab01 (diff) | |
drm/i915: Convert clflushed pagetables over to WC maps
We flush the entire page every time we update a few bytes, making the
update of a page table many, many times slower than is required. If we
create a WC map of the page for our updates, we can avoid the clflush
but incur additional cost for creating the pagetable. We amoritize that
cost by reusing page vmappings, and only changing the page protection in
batches.
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Mika Kuoppala <mika.kuoppala@intel.com>
Diffstat (limited to 'drivers/gpu/drm/i915/selftests')
| -rw-r--r-- | drivers/gpu/drm/i915/selftests/i915_gem_gtt.c | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/drivers/gpu/drm/i915/selftests/i915_gem_gtt.c b/drivers/gpu/drm/i915/selftests/i915_gem_gtt.c index 320c6879fd83..e23753181720 100644 --- a/drivers/gpu/drm/i915/selftests/i915_gem_gtt.c +++ b/drivers/gpu/drm/i915/selftests/i915_gem_gtt.c @@ -832,17 +832,17 @@ static int shrink_hole(struct drm_i915_private *i915, unsigned long prime; int err; - i915->vm_fault.probability = 999; - atomic_set(&i915->vm_fault.times, -1); + vm->fault_attr.probability = 999; + atomic_set(&vm->fault_attr.times, -1); for_each_prime_number_from(prime, 0, ULONG_MAX - 1) { - i915->vm_fault.interval = prime; + vm->fault_attr.interval = prime; err = __shrink_hole(i915, vm, hole_start, hole_end, end_time); if (err) break; } - memset(&i915->vm_fault, 0, sizeof(i915->vm_fault)); + memset(&vm->fault_attr, 0, sizeof(vm->fault_attr)); return err; } |