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Tool which emits batch buffers to engines with configurable
sequences, durations, contexts, dependencies and userspace waits.
Unfinished but shows promise so sending out for early feedback.
v2:
* Load workload descriptors from files. (also -w)
* Help text.
* Calibration control if needed. (-t)
* NORELOC | LUT to eb flags.
* Added sample workload to wsim/workload1.
v3:
* Multiple parallel different workloads (-w -w ...).
* Multi-context workloads.
* Variable (random) batch length.
* Load balancing (round robin and queue depth estimation).
* Workloads delays and explicit sync steps.
* Workload frequency (period) control.
v4:
* Fixed queue-depth estimation by creating separate batches
per engine when qd load balancing is on.
* Dropped separate -s cmd line option. It can turn itself on
automatically when needed.
* Keep a single status page and lie about the write hazard
as suggested by Chris.
* Use batch_start_offset for controlling the batch duration.
(Chris)
* Set status page object cache level. (Chris)
* Moved workload description to a README.
* Tidied example workloads.
* Some other cleanups and refactorings.
v5:
* Master and background workloads (-W / -w).
* Single batch per step is enough even when balancing. (Chris)
* Use hars_petruska_f54_1_random IGT functions and see to zero
at start. (Chris)
* Use WC cache domain when WC mapping. (Chris)
* Keep seqnos 64-bytes apart in the status page. (Chris)
* Add workload throttling and queue-depth throttling commands.
(Chris)
v6:
* Added two more workloads.
* Merged RT balancer from Chris.
v7:
* Merged NO_RELOC patch from Chris.
* Added missing RT balancer to help text.
TODO list:
* Fence support.
* Batch buffer caching (re-use pool).
* Better error handling.
* Less 1980's workload parsing.
* More workloads.
* Threads?
* ... ?
Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Cc: "Rogozhkin, Dmitry V" <dmitry.v.rogozhkin@intel.com>
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