From: Tvrtko Ursulin <tvrtko.ursulin@xxxxxxxxx>
It was quite some time since I last posted this RFC, but recently there has been
some new interest, this time from OpenCL and related customers, so I decided to
give it a quick respin and test the waters.
This time round it has been really hastily rebased since the upstream changed
quite a lot and I have very little confidence it is technically correct. But it
is enough to illustrate a point of what this feature could provide:
In short it enables a "top-like" display for GPU tasks. Or with a screenshot:
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
intel-gpu-top - 948/ 999 MHz; 0% RC6; 3.65 Watts; 2165 irqs/s
IMC reads: 5015 MiB/s
IMC writes: 143 MiB/s
ENGINE BUSY MI_SEMA MI_WAIT
Render/3D/0 56.60% |███████████████████████████▋ | 0% 0%
Blitter/0 95.65% |██████████████████████████████████████████████▊ | 0% 0%
Video/0 40.92% |████████████████████ | 0% 0%
VideoEnhance/0 0.00% | | 0% 0%
PID NAME RCS BCS VCS VECS
5347 gem_wsim |███████▍ ||███████████████▏||██████▌ || |
4929 Xorg |▎ || || || |
5305 glxgears | || || || |
5303 glxgears | || || || |
5024 xfwm4 | || || || |
4929 Xorg | || || || |
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Implementation wise we would get a a bunch of per-drm-client-per-engine-class
files in sysfs like:
# cd /sys/class/drm/card0/clients/
# tree
.
├── 7
│ ├── busy
│ │ ├── 0
│ │ ├── 1
│ │ ├── 2
│ │ └── 3
│ ├── name
│ └── pid
├── 8
│ ├── busy
│ │ ├── 0
│ │ ├── 1
│ │ ├── 2
│ │ └── 3
│ ├── name
│ └── pid
├── 9
│ ├── busy
│ │ ├── 0
│ │ ├── 1
│ │ ├── 2
│ │ └── 3
│ ├── name
│ └── pid
└── enable_stats
I will post the corresponding patch to intel_gpu_top for reference as well.
Tvrtko Ursulin (5):
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
drivers/gpu/drm/i915/gem/i915_gem_context.c | 17 +-
drivers/gpu/drm/i915/gt/intel_context.c | 20 ++
drivers/gpu/drm/i915/gt/intel_context.h | 9 +
drivers/gpu/drm/i915/gt/intel_context_types.h | 9 +
drivers/gpu/drm/i915/gt/intel_engine_cs.c | 16 +-
drivers/gpu/drm/i915/gt/intel_lrc.c | 66 +++++-
drivers/gpu/drm/i915/i915_drv.h | 38 +++
drivers/gpu/drm/i915/i915_gem.c | 218 +++++++++++++++++-
drivers/gpu/drm/i915/i915_sysfs.c | 81 +++++++
9 files changed, 451 insertions(+), 23 deletions(-)
--
2.20.1
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