[PATCH v4 0/4] Support fdinfo runtime and memory stats on Panthor

Adrián Larumbe
2024-07-16T20:13:15Z

This patch series enables userspace utilities like gputop and nvtop to
query a render context's fdinfo file and figure out rates of engine
and memory utilisation.

Previous discussion can be found at
https://lore.kernel.org/dri-devel/dqhnxhgho6spfh7xhw6yvs2iiqeqzeg63e6jqqpw2g7gkrfphn@dojsixyl4esv/

Changelog:
v4:
- Fixed wrong assignment location for frequency values in Panthor's devfreq
- Removed the last two commits about registering size of internal BO's
- Rearranged patch series so that sysfs knob is done last and all the previous
time sampling and fdinfo show dependencies are already in place
v3:
- Fixed some nits and removed useless bounds check in panthor_sched.c
- Added support for sysfs profiling knob and optional job accounting
- Added new patches for calculating size of internal BO's
v2:
- Split original first patch in two, one for FW CS cycle and timestamp
calculations and job accounting memory management, and a second one
that enables fdinfo.
- Moved NUM_INSTRS_PER_SLOT to the file prelude
- Removed nelem variable from the group's struct definition.
- Precompute size of group's syncobj BO to avoid code duplication.
- Some minor nits.

Adrián Larumbe (4):
drm/panthor: introduce job cycle and timestamp accounting
drm/panthor: add DRM fdinfo support
drm/panthor: enable fdinfo for memory stats
drm/panthor: add sysfs knob for enabling job profiling

drivers/gpu/drm/panthor/panthor_devfreq.c | 18 +-
drivers/gpu/drm/panthor/panthor_device.h | 12 +
drivers/gpu/drm/panthor/panthor_drv.c | 69 +++++
drivers/gpu/drm/panthor/panthor_gem.c | 12 +
drivers/gpu/drm/panthor/panthor_sched.c | 291 +++++++++++++++++++---
5 files changed, 371 insertions(+), 31 deletions(-)

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2.45.1