| Message ID | 20230308155322.344664-1-robdclark@gmail.com (mailing list archive) |
|---|---|
| Headers | show |
| Series | dma-fence: Deadline awareness | expand |
On Wed, 8 Mar 2023 07:52:51 -0800 Rob Clark <robdclark@gmail.com> wrote: > From: Rob Clark <robdclark@chromium.org> > > This series adds a deadline hint to fences, so realtime deadlines > such as vblank can be communicated to the fence signaller for power/ > frequency management decisions. > > This is partially inspired by a trick i915 does, but implemented > via dma-fence for a couple of reasons: > > 1) To continue to be able to use the atomic helpers > 2) To support cases where display and gpu are different drivers > > This iteration adds a dma-fence ioctl to set a deadline (both to > support igt-tests, and compositors which delay decisions about which > client buffer to display), and a sw_sync ioctl to read back the > deadline. IGT tests utilizing these can be found at: > > https://gitlab.freedesktop.org/robclark/igt-gpu-tools/-/commits/fence-deadline > > > v1: https://patchwork.freedesktop.org/series/93035/ > v2: Move filtering out of later deadlines to fence implementation > to avoid increasing the size of dma_fence > v3: Add support in fence-array and fence-chain; Add some uabi to > support igt tests and userspace compositors. > v4: Rebase, address various comments, and add syncobj deadline > support, and sync_file EPOLLPRI based on experience with perf/ > freq issues with clvk compute workloads on i915 (anv) > v5: Clarify that this is a hint as opposed to a more hard deadline > guarantee, switch to using u64 ns values in UABI (still absolute > CLOCK_MONOTONIC values), drop syncobj related cap and driver > feature flag in favor of allowing count_handles==0 for probing > kernel support. > v6: Re-work vblank helper to calculate time of _start_ of vblank, > and work correctly if the last vblank event was more than a > frame ago. Add (mostly unrelated) drm/msm patch which also > uses the vblank helper. Use dma_fence_chain_contained(). More > verbose syncobj UABI comments. Drop DMA_FENCE_FLAG_HAS_DEADLINE_BIT. > v7: Fix kbuild complaints about vblank helper. Add more docs. > v8: Add patch to surface sync_file UAPI, and more docs updates. > v9: Drop (E)POLLPRI support.. I still like it, but not essential and > it can always be revived later. Fix doc build warning. > v10: Update 11/15 to handle multiple CRTCs Hi Rob, it is very nice to keep revision numbers and list the changes in each patch. If I looked at series v8 last, and I now see series v10, and I look at a patch that lists changes done in v7, how do I know if that change was made between series v8 and v10 or earlier? At least in some previous revision, series might have been v8 and a patch have new changes listed as v5 (because it was the 5th time that one patch was changed) instead of v8. Am I expected to keep track of vN of each individual patch independently? Thanks, pq
On Wed, Mar 8, 2023 at 7:53 AM Rob Clark <robdclark@gmail.com> wrote: > > From: Rob Clark <robdclark@chromium.org> > > This series adds a deadline hint to fences, so realtime deadlines > such as vblank can be communicated to the fence signaller for power/ > frequency management decisions. > > This is partially inspired by a trick i915 does, but implemented > via dma-fence for a couple of reasons: > > 1) To continue to be able to use the atomic helpers > 2) To support cases where display and gpu are different drivers > > This iteration adds a dma-fence ioctl to set a deadline (both to > support igt-tests, and compositors which delay decisions about which > client buffer to display), and a sw_sync ioctl to read back the > deadline. IGT tests utilizing these can be found at: > > https://gitlab.freedesktop.org/robclark/igt-gpu-tools/-/commits/fence-deadline > jfwiw, mesa side of this: https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/21973 BR, -R > > v1: https://patchwork.freedesktop.org/series/93035/ > v2: Move filtering out of later deadlines to fence implementation > to avoid increasing the size of dma_fence > v3: Add support in fence-array and fence-chain; Add some uabi to > support igt tests and userspace compositors. > v4: Rebase, address various comments, and add syncobj deadline > support, and sync_file EPOLLPRI based on experience with perf/ > freq issues with clvk compute workloads on i915 (anv) > v5: Clarify that this is a hint as opposed to a more hard deadline > guarantee, switch to using u64 ns values in UABI (still absolute > CLOCK_MONOTONIC values), drop syncobj related cap and driver > feature flag in favor of allowing count_handles==0 for probing > kernel support. > v6: Re-work vblank helper to calculate time of _start_ of vblank, > and work correctly if the last vblank event was more than a > frame ago. Add (mostly unrelated) drm/msm patch which also > uses the vblank helper. Use dma_fence_chain_contained(). More > verbose syncobj UABI comments. Drop DMA_FENCE_FLAG_HAS_DEADLINE_BIT. > v7: Fix kbuild complaints about vblank helper. Add more docs. > v8: Add patch to surface sync_file UAPI, and more docs updates. > v9: Drop (E)POLLPRI support.. I still like it, but not essential and > it can always be revived later. Fix doc build warning. > v10: Update 11/15 to handle multiple CRTCs > > Rob Clark (15): > dma-buf/dma-fence: Add deadline awareness > dma-buf/fence-array: Add fence deadline support > dma-buf/fence-chain: Add fence deadline support > dma-buf/dma-resv: Add a way to set fence deadline > dma-buf/sync_file: Surface sync-file uABI > dma-buf/sync_file: Add SET_DEADLINE ioctl > dma-buf/sw_sync: Add fence deadline support > drm/scheduler: Add fence deadline support > drm/syncobj: Add deadline support for syncobj waits > drm/vblank: Add helper to get next vblank time > drm/atomic-helper: Set fence deadline for vblank > drm/msm: Add deadline based boost support > drm/msm: Add wait-boost support > drm/msm/atomic: Switch to vblank_start helper > drm/i915: Add deadline based boost support > > Rob Clark (15): > dma-buf/dma-fence: Add deadline awareness > dma-buf/fence-array: Add fence deadline support > dma-buf/fence-chain: Add fence deadline support > dma-buf/dma-resv: Add a way to set fence deadline > dma-buf/sync_file: Surface sync-file uABI > dma-buf/sync_file: Add SET_DEADLINE ioctl > dma-buf/sw_sync: Add fence deadline support > drm/scheduler: Add fence deadline support > drm/syncobj: Add deadline support for syncobj waits > drm/vblank: Add helper to get next vblank time > drm/atomic-helper: Set fence deadline for vblank > drm/msm: Add deadline based boost support > drm/msm: Add wait-boost support > drm/msm/atomic: Switch to vblank_start helper > drm/i915: Add deadline based boost support > > Documentation/driver-api/dma-buf.rst | 16 ++++- > drivers/dma-buf/dma-fence-array.c | 11 ++++ > drivers/dma-buf/dma-fence-chain.c | 12 ++++ > drivers/dma-buf/dma-fence.c | 60 ++++++++++++++++++ > drivers/dma-buf/dma-resv.c | 22 +++++++ > drivers/dma-buf/sw_sync.c | 81 +++++++++++++++++++++++++ > drivers/dma-buf/sync_debug.h | 2 + > drivers/dma-buf/sync_file.c | 19 ++++++ > drivers/gpu/drm/drm_atomic_helper.c | 37 +++++++++++ > drivers/gpu/drm/drm_syncobj.c | 64 +++++++++++++++---- > drivers/gpu/drm/drm_vblank.c | 53 +++++++++++++--- > drivers/gpu/drm/i915/i915_request.c | 20 ++++++ > drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c | 15 ----- > drivers/gpu/drm/msm/msm_atomic.c | 8 ++- > drivers/gpu/drm/msm/msm_drv.c | 12 ++-- > drivers/gpu/drm/msm/msm_fence.c | 74 ++++++++++++++++++++++ > drivers/gpu/drm/msm/msm_fence.h | 20 ++++++ > drivers/gpu/drm/msm/msm_gem.c | 5 ++ > drivers/gpu/drm/msm/msm_kms.h | 8 --- > drivers/gpu/drm/scheduler/sched_fence.c | 46 ++++++++++++++ > drivers/gpu/drm/scheduler/sched_main.c | 2 +- > include/drm/drm_vblank.h | 1 + > include/drm/gpu_scheduler.h | 17 ++++++ > include/linux/dma-fence.h | 22 +++++++ > include/linux/dma-resv.h | 2 + > include/uapi/drm/drm.h | 17 ++++++ > include/uapi/drm/msm_drm.h | 14 ++++- > include/uapi/linux/sync_file.h | 59 +++++++++++------- > 28 files changed, 640 insertions(+), 79 deletions(-) > > -- > 2.39.2 >
On Wed, Mar 8, 2023 at 10:53 AM Rob Clark <robdclark@gmail.com> wrote: > > From: Rob Clark <robdclark@chromium.org> > > This series adds a deadline hint to fences, so realtime deadlines > such as vblank can be communicated to the fence signaller for power/ > frequency management decisions. > > This is partially inspired by a trick i915 does, but implemented > via dma-fence for a couple of reasons: > > 1) To continue to be able to use the atomic helpers > 2) To support cases where display and gpu are different drivers > > This iteration adds a dma-fence ioctl to set a deadline (both to > support igt-tests, and compositors which delay decisions about which > client buffer to display), and a sw_sync ioctl to read back the > deadline. IGT tests utilizing these can be found at: I read through the series and didn't spot anything. Have a rather weak Reviewed-by: Matt Turner <mattst88@gmail.com> Thanks!
From: Rob Clark <robdclark@chromium.org> This series adds a deadline hint to fences, so realtime deadlines such as vblank can be communicated to the fence signaller for power/ frequency management decisions. This is partially inspired by a trick i915 does, but implemented via dma-fence for a couple of reasons: 1) To continue to be able to use the atomic helpers 2) To support cases where display and gpu are different drivers This iteration adds a dma-fence ioctl to set a deadline (both to support igt-tests, and compositors which delay decisions about which client buffer to display), and a sw_sync ioctl to read back the deadline. IGT tests utilizing these can be found at: https://gitlab.freedesktop.org/robclark/igt-gpu-tools/-/commits/fence-deadline v1: https://patchwork.freedesktop.org/series/93035/ v2: Move filtering out of later deadlines to fence implementation to avoid increasing the size of dma_fence v3: Add support in fence-array and fence-chain; Add some uabi to support igt tests and userspace compositors. v4: Rebase, address various comments, and add syncobj deadline support, and sync_file EPOLLPRI based on experience with perf/ freq issues with clvk compute workloads on i915 (anv) v5: Clarify that this is a hint as opposed to a more hard deadline guarantee, switch to using u64 ns values in UABI (still absolute CLOCK_MONOTONIC values), drop syncobj related cap and driver feature flag in favor of allowing count_handles==0 for probing kernel support. v6: Re-work vblank helper to calculate time of _start_ of vblank, and work correctly if the last vblank event was more than a frame ago. Add (mostly unrelated) drm/msm patch which also uses the vblank helper. Use dma_fence_chain_contained(). More verbose syncobj UABI comments. Drop DMA_FENCE_FLAG_HAS_DEADLINE_BIT. v7: Fix kbuild complaints about vblank helper. Add more docs. v8: Add patch to surface sync_file UAPI, and more docs updates. v9: Drop (E)POLLPRI support.. I still like it, but not essential and it can always be revived later. Fix doc build warning. v10: Update 11/15 to handle multiple CRTCs Rob Clark (15): dma-buf/dma-fence: Add deadline awareness dma-buf/fence-array: Add fence deadline support dma-buf/fence-chain: Add fence deadline support dma-buf/dma-resv: Add a way to set fence deadline dma-buf/sync_file: Surface sync-file uABI dma-buf/sync_file: Add SET_DEADLINE ioctl dma-buf/sw_sync: Add fence deadline support drm/scheduler: Add fence deadline support drm/syncobj: Add deadline support for syncobj waits drm/vblank: Add helper to get next vblank time drm/atomic-helper: Set fence deadline for vblank drm/msm: Add deadline based boost support drm/msm: Add wait-boost support drm/msm/atomic: Switch to vblank_start helper drm/i915: Add deadline based boost support Rob Clark (15): dma-buf/dma-fence: Add deadline awareness dma-buf/fence-array: Add fence deadline support dma-buf/fence-chain: Add fence deadline support dma-buf/dma-resv: Add a way to set fence deadline dma-buf/sync_file: Surface sync-file uABI dma-buf/sync_file: Add SET_DEADLINE ioctl dma-buf/sw_sync: Add fence deadline support drm/scheduler: Add fence deadline support drm/syncobj: Add deadline support for syncobj waits drm/vblank: Add helper to get next vblank time drm/atomic-helper: Set fence deadline for vblank drm/msm: Add deadline based boost support drm/msm: Add wait-boost support drm/msm/atomic: Switch to vblank_start helper drm/i915: Add deadline based boost support Documentation/driver-api/dma-buf.rst | 16 ++++- drivers/dma-buf/dma-fence-array.c | 11 ++++ drivers/dma-buf/dma-fence-chain.c | 12 ++++ drivers/dma-buf/dma-fence.c | 60 ++++++++++++++++++ drivers/dma-buf/dma-resv.c | 22 +++++++ drivers/dma-buf/sw_sync.c | 81 +++++++++++++++++++++++++ drivers/dma-buf/sync_debug.h | 2 + drivers/dma-buf/sync_file.c | 19 ++++++ drivers/gpu/drm/drm_atomic_helper.c | 37 +++++++++++ drivers/gpu/drm/drm_syncobj.c | 64 +++++++++++++++---- drivers/gpu/drm/drm_vblank.c | 53 +++++++++++++--- drivers/gpu/drm/i915/i915_request.c | 20 ++++++ drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c | 15 ----- drivers/gpu/drm/msm/msm_atomic.c | 8 ++- drivers/gpu/drm/msm/msm_drv.c | 12 ++-- drivers/gpu/drm/msm/msm_fence.c | 74 ++++++++++++++++++++++ drivers/gpu/drm/msm/msm_fence.h | 20 ++++++ drivers/gpu/drm/msm/msm_gem.c | 5 ++ drivers/gpu/drm/msm/msm_kms.h | 8 --- drivers/gpu/drm/scheduler/sched_fence.c | 46 ++++++++++++++ drivers/gpu/drm/scheduler/sched_main.c | 2 +- include/drm/drm_vblank.h | 1 + include/drm/gpu_scheduler.h | 17 ++++++ include/linux/dma-fence.h | 22 +++++++ include/linux/dma-resv.h | 2 + include/uapi/drm/drm.h | 17 ++++++ include/uapi/drm/msm_drm.h | 14 ++++- include/uapi/linux/sync_file.h | 59 +++++++++++------- 28 files changed, 640 insertions(+), 79 deletions(-)