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

Message

Adrián Larumbe July 16, 2024, 8:11 p.m. UTC

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(-)