Re: [PATCH 0/7] Preemption support for A7XX

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On 15/08/2024 20:26, Antonino Maniscalco wrote:
This series implements preemption for A7XX targets, which allows the GPU to
switch to an higher priority ring when work is pushed to it, reducing latency
for high priority submissions.

This series enables L1 preemption with skip_save_restore which requires
the following userspace patches to function:

https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/30544

A flag is added to `msm_gem_submit` to only allow submissions from compatible
userspace to be preempted, therefore maintaining compatibility.

Some commits from this series are based on a previous series to enable
preemption on A6XX targets:

https://lkml.kernel.org/1520489185-21828-1-git-send-email-smasetty@xxxxxxxxxxxxxx

Signed-off-by: Antonino Maniscalco <antomani103@xxxxxxxxx>
---
Antonino Maniscalco (7):
       drm/msm: Fix bv_fence being used as bv_rptr
       drm/msm: Add submitqueue setup and close
       drm/msm: Add a `preempt_record_size` field
       drm/msm/A6xx: Implement preemption for A7XX targets
       drm/msm/A6xx: Add traces for preemption
       drm/msm/A6XX: Add a flag to allow preemption to submitqueue_create
       drm/msm/A6xx: Enable preemption for A7xx targets

  drivers/gpu/drm/msm/Makefile              |   1 +
  drivers/gpu/drm/msm/adreno/a6xx_catalog.c |   3 +
  drivers/gpu/drm/msm/adreno/a6xx_gpu.c     | 339 ++++++++++++++++++++++-
  drivers/gpu/drm/msm/adreno/a6xx_gpu.h     | 168 ++++++++++++
  drivers/gpu/drm/msm/adreno/a6xx_preempt.c | 441 ++++++++++++++++++++++++++++++
  drivers/gpu/drm/msm/adreno/adreno_gpu.h   |   1 +
  drivers/gpu/drm/msm/msm_gpu.h             |   7 +
  drivers/gpu/drm/msm/msm_gpu_trace.h       |  28 ++
  drivers/gpu/drm/msm/msm_ringbuffer.h      |   8 +
  drivers/gpu/drm/msm/msm_submitqueue.c     |  10 +
  include/uapi/drm/msm_drm.h                |   5 +-
  11 files changed, 995 insertions(+), 16 deletions(-)
---
base-commit: 7c626ce4bae1ac14f60076d00eafe71af30450ba
change-id: 20240815-preemption-a750-t-fcee9a844b39

Best regards,

For what is worth, I've tested it on the SM8650 QRD with the Mesa 30544 MR & vkcube

Tested-by: Neil Armstrong <neil.armstrong@xxxxxxxxxx> # on SM8650-QRD

If you think of more tests to run, please tell me.

Neil



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