From: Tvrtko Ursulin <tvrtko.ursulin@linux.intel.com>
To: Intel-gfx@lists.freedesktop.org
Subject: [Intel-gfx] [RFC 00/12] Per client engine busyness
Date: Wed, 11 Mar 2020 18:26:08 +0000 [thread overview]
Message-ID: <20200311182618.21513-1-tvrtko.ursulin@linux.intel.com> (raw)
From: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Another re-spin of the per-client engine busyness series. Highlights from this
version:
* Last two patches contain a hybrid method of tracking context runtime. PPHWSP
tracked one is used as a baseline and then on top i915 tracks the start time
of when context was last started executing on the GPU. Together this should
give better overall resilience against spammy workloads and also provides
visibility to long/infinite batches.
Internally we track time spent on engines for each struct intel_context. This
can serve as a building block for several features from the want list:
smarter scheduler decisions, getrusage(2)-like per-GEM-context functionality
wanted by some customers, cgroups controller, dynamic SSEU tuning,...
Externally, in sysfs, we expose time spent on GPU per client and per engine
class.
Sysfs interface enables us to implement a "top-like" tool for GPU tasks. Or with
a "screenshot":
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
intel-gpu-top - 906/ 955 MHz; 0% RC6; 5.30 Watts; 933 irqs/s
IMC reads: 4414 MiB/s
IMC writes: 3805 MiB/s
ENGINE BUSY MI_SEMA MI_WAIT
Render/3D/0 93.46% |████████████████████████████████▋ | 0% 0%
Blitter/0 0.00% | | 0% 0%
Video/0 0.00% | | 0% 0%
VideoEnhance/0 0.00% | | 0% 0%
PID NAME Render/3D Blitter Video VideoEnhance
2733 neverball |██████▌ || || || |
2047 Xorg |███▊ || || || |
2737 glxgears |█▍ || || || |
2128 xfwm4 | || || || |
2047 Xorg | || || || |
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Implementation wise we add a a bunch of 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
Files in 'busy' directories are numbered using the engine class ABI values and
they contain accumulated nanoseconds each client spent on engines of a
respective class.
It is stil a RFC since it misses dedicated test cases to ensure things really
work as advertised.
Tvrtko Ursulin (10):
drm/i915: Expose list of clients in sysfs
drm/i915: Update client name on context create
drm/i915: Make GEM contexts track DRM clients
drm/i915: Use explicit flag to mark unreachable intel_context
drm/i915: Track runtime spent in unreachable intel_contexts
drm/i915: Track runtime spent in closed GEM contexts
drm/i915: Track all user contexts per client
drm/i915: Expose per-engine client busyness
drm/i915: Track context current active time
drm/i915: Prefer software tracked context busyness
drivers/gpu/drm/i915/Makefile | 3 +-
drivers/gpu/drm/i915/gem/i915_gem_context.c | 66 ++-
.../gpu/drm/i915/gem/i915_gem_context_types.h | 21 +-
.../gpu/drm/i915/gem/i915_gem_execbuffer.c | 2 +-
drivers/gpu/drm/i915/gt/intel_context.c | 18 +-
drivers/gpu/drm/i915/gt/intel_context.h | 6 +-
drivers/gpu/drm/i915/gt/intel_context_types.h | 25 +-
drivers/gpu/drm/i915/gt/intel_lrc.c | 55 ++-
drivers/gpu/drm/i915/gt/selftest_lrc.c | 10 +-
drivers/gpu/drm/i915/i915_debugfs.c | 31 +-
drivers/gpu/drm/i915/i915_drm_client.c | 434 ++++++++++++++++++
drivers/gpu/drm/i915/i915_drm_client.h | 94 ++++
drivers/gpu/drm/i915/i915_drv.h | 5 +
drivers/gpu/drm/i915/i915_gem.c | 35 +-
drivers/gpu/drm/i915/i915_gpu_error.c | 25 +-
drivers/gpu/drm/i915/i915_sysfs.c | 8 +
16 files changed, 756 insertions(+), 82 deletions(-)
create mode 100644 drivers/gpu/drm/i915/i915_drm_client.c
create mode 100644 drivers/gpu/drm/i915/i915_drm_client.h
--
2.20.1
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next reply other threads:[~2020-03-11 18:26 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-03-11 18:26 Tvrtko Ursulin [this message]
2020-03-11 18:26 ` [Intel-gfx] [RFC 01/10] drm/i915: Expose list of clients in sysfs Tvrtko Ursulin
2020-03-13 10:36 ` Chris Wilson
2020-03-11 18:26 ` [Intel-gfx] [RFC 02/10] drm/i915: Update client name on context create Tvrtko Ursulin
2020-03-13 10:41 ` Chris Wilson
2020-03-11 18:26 ` [Intel-gfx] [RFC 03/10] drm/i915: Make GEM contexts track DRM clients Tvrtko Ursulin
2020-03-13 11:00 ` Chris Wilson
2020-03-11 18:26 ` [Intel-gfx] [RFC 04/10] drm/i915: Use explicit flag to mark unreachable intel_context Tvrtko Ursulin
2020-03-13 11:03 ` Chris Wilson
2020-03-11 18:26 ` [Intel-gfx] [RFC 05/10] drm/i915: Track runtime spent in unreachable intel_contexts Tvrtko Ursulin
2020-03-11 18:26 ` [Intel-gfx] [RFC 06/10] drm/i915: Track runtime spent in closed GEM contexts Tvrtko Ursulin
2020-03-11 18:26 ` [Intel-gfx] [RFC 07/10] drm/i915: Track all user contexts per client Tvrtko Ursulin
2020-03-11 18:26 ` [Intel-gfx] [RFC 08/10] drm/i915: Expose per-engine client busyness Tvrtko Ursulin
2020-03-11 18:26 ` [Intel-gfx] [RFC 09/10] drm/i915: Track context current active time Tvrtko Ursulin
2020-03-11 18:26 ` [Intel-gfx] [RFC 10/10] drm/i915: Prefer software tracked context busyness Tvrtko Ursulin
2020-03-12 2:08 ` [Intel-gfx] ✗ Fi.CI.CHECKPATCH: warning for Per client engine busyness (rev6) Patchwork
2020-03-12 2:14 ` [Intel-gfx] ✗ Fi.CI.SPARSE: " Patchwork
2020-03-12 2:33 ` [Intel-gfx] ✗ Fi.CI.BAT: failure " Patchwork
2020-03-13 10:28 ` [Intel-gfx] ✗ Fi.CI.CHECKPATCH: warning for Per client engine busyness (rev7) Patchwork
2020-03-13 10:34 ` [Intel-gfx] ✗ Fi.CI.SPARSE: " Patchwork
2020-03-13 10:54 ` [Intel-gfx] ✓ Fi.CI.BAT: success " Patchwork
2020-03-13 17:26 ` [Intel-gfx] ✓ Fi.CI.IGT: " Patchwork
-- strict thread matches above, loose matches on Subject: below --
2020-03-09 18:31 [Intel-gfx] [RFC 00/12] Per client engine busyness Tvrtko Ursulin
2020-03-09 22:02 ` Chris Wilson
2020-03-09 23:30 ` Tvrtko Ursulin
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