On Thu, Aug 16, 2018 at 08:41:44AM +0800, Dieter Nützel wrote: > For the series > > Tested-by: Dieter Nützel <Dieter at nuetzel-hh.de> > > on RX580, > amd-staging-drm-next > #5024f8dfe478 > Thank you so much, will add tested-by in next version. Thanks, Ray > Dieter > > Am 13.08.2018 11:58, schrieb Huang Rui: > > The idea and proposal is originally from Christian, and I continue to > > work to > > deliver it. > > > > Background: > > amdgpu driver will move all PD/PT and PerVM BOs into idle list. Then > > move all of > > them on the end of LRU list one by one. Thus, that cause so many BOs > > moved to > > the end of the LRU, and impact performance seriously. > > > > Then Christian provided a workaround to not move PD/PT BOs on LRU with > > below > > patch: > > "drm/amdgpu: band aid validating VM PTs" > > Commit 0bbf32026cf5ba41e9922b30e26e1bed1ecd38ae > > > > However, the final solution should bulk move all PD/PT and PerVM BOs on > > the LRU > > instead of one by one. > > > > Whenever amdgpu_vm_validate_pt_bos() is called and we have BOs which > > need to be > > validated we move all BOs together to the end of the LRU without > > dropping the > > lock for the LRU. > > > > While doing so we note the beginning and end of this block in the LRU > > list. > > > > Now when amdgpu_vm_validate_pt_bos() is called and we don't have > > anything to do, > > we don't move every BO one by one, but instead cut the LRU list into > > pieces so > > that we bulk move everything to the end in just one operation. > > > > Test data: > > +--------------+-----------------+-----------+---------------------------------------+ > > | |The Talos |Clpeak(OCL)|BusSpeedReadback(OCL) > > | > > | |Principle(Vulkan)| | > > | > > +------------------------------------------------------------------------------------+ > > | | | |0.319 ms(1k) 0.314 > > ms(2K) 0.308 ms(4K) | > > | Original | 147.7 FPS | 76.86 us |0.307 ms(8K) 0.310 > > ms(16K) | > > +------------------------------------------------------------------------------------+ > > | Orignial + WA| | |0.254 ms(1K) 0.241 > > ms(2K) | > > |(don't move | 162.1 FPS | 42.15 us |0.230 ms(4K) 0.223 > > ms(8K) 0.204 ms(16K)| > > |PT BOs on LRU)| | | > > | > > +------------------------------------------------------------------------------------+ > > | Bulk move | 163.1 FPS | 40.52 us |0.244 ms(1K) 0.252 > > ms(2K) 0.213 ms(4K) | > > | | | |0.214 ms(8K) 0.225 > > ms(16K) | > > +--------------+-----------------+-----------+---------------------------------------+ > > > > After test them with above three benchmarks include vulkan and opencl. > > We can > > see the visible improvement than original, and even better than > > original with > > workaround. > > > > Changes from V1 -> V2: > > - Fix to missed the BOs in relocated/moved that should be also moved to > > the end > > of LRU. > > > > Changes from V2 -> V3: > > - Remove unused parameter and use list_for_each_entry instead of the > > one with > > save entry. > > > > Thanks, > > Rui > > > > Christian König (2): > > drm/ttm: add helper structures for bulk moves on lru list > > drm/ttm: revise ttm_bo_move_to_lru_tail to support bulk moves > > > > Huang Rui (3): > > drm/ttm: add bulk move function on LRU > > drm/amdgpu: use bulk moves for efficient VM LRU handling (v3) > > drm/amdgpu: move PD/PT bos on LRU again > > > > drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c | 75 > > ++++++++++++++++++++++++-------- > > drivers/gpu/drm/amd/amdgpu/amdgpu_vm.h | 4 ++ > > drivers/gpu/drm/ttm/ttm_bo.c | 78 > > +++++++++++++++++++++++++++++++++- > > include/drm/ttm/ttm_bo_api.h | 16 ++++++- > > include/drm/ttm/ttm_bo_driver.h | 28 ++++++++++++ > > 5 files changed, 182 insertions(+), 19 deletions(-)
