From: Tvrtko Ursulin <tvrtko.ursulin@xxxxxxxxx>
Another re-post of my earlier, now slightly updated work, to expose a DRM client
hierarchy in sysfs in order to enable a top like tool:
intel-gpu-top - load avg 40.80, 27.11, 1.50; 882/ 950 MHz; 0% RC6; 13.26 Watts; 261903 irqs/s
IMC reads: 5543 MiB/s
IMC writes: 236 MiB/s
ENGINE BUSY QD MI_SEMA MI_WAIT
Render/3D/0 60.47% |███████████▍ | 28 0 1 0% 0%
Blitter/0 92.70% |█████████████████▌ | 0 0 1 0% 0%
Video/0 100.00% |███████████████████| 15 37 2 0% 0%
Video/1 51.68% |█████████▊ | 0 0 1 0% 0%
VideoEnhance/0 0.00% | | 0 0 0 0% 0%
PID NAME rcs0 bcs0 vcs0 vcs1 vecs0
21664 gem_wsim |█████▍ || ||█████████||████▋ || |
21662 gem_latency | ||████████▎|| || || |
21662 gem_latency | || || || || |
Hopefully the screen shot is self-explanatory. It shows overall GPU per-engine
stats, plus per-client and per-engine busyness.
In this version all review feedback has been incorporated and the context param
query for DCG is back as the last patch. (DCG should only need patches 1-2 & 7).
For the rest I kept the interface as sysfs in hope it would have the advantage
of solving the access control one day. (Setting ownership on sysfs nodes to
follow the DRM client? Still have to investigate this angle.)
This time around I won't be sending the IGT patches since I am building it all
on top of engine queue depths, and on top of the intel-gpu-top rewrite. Both are
unmerged so sending it all just to show this would be a bit much.
Tvrtko Ursulin (7):
drm/i915: Use seqlock in engine stats
drm/i915: Track per-context engine busyness
drm/i915: Expose list of clients in sysfs
drm/i915: Update client name on context create
drm/i915: Expose per-engine client busyness
drm/i915: Add sysfs toggle to enable per-client engine stats
drm/i915: Allow clients to query own per-engine busyness
drivers/gpu/drm/i915/i915_drv.h | 39 +++++++
drivers/gpu/drm/i915/i915_gem.c | 192 ++++++++++++++++++++++++++++++--
drivers/gpu/drm/i915/i915_gem_context.c | 121 +++++++++++++++++++-
drivers/gpu/drm/i915/i915_gem_context.h | 8 ++
drivers/gpu/drm/i915/i915_sysfs.c | 80 +++++++++++++
drivers/gpu/drm/i915/intel_engine_cs.c | 50 +++++++--
drivers/gpu/drm/i915/intel_lrc.c | 14 ++-
drivers/gpu/drm/i915/intel_ringbuffer.h | 66 +++++++++--
include/uapi/drm/i915_drm.h | 21 ++++
9 files changed, 553 insertions(+), 38 deletions(-)
--
2.14.1
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