Making iree-benchmark-trace work with stateful traces. (#12552)

This reworks it from precaching calls and running over those to instead
reprocessing the entire trace YAML each iteration but only timing the
calls. This allows for pretty much all trace features (with a few
tweaks). `<stdin>` modules are supported by passing `--capture_stdin` to
the tool so that it captures it once and reuses it for all reads. Inputs
are reparsed each iteration so that traces which take ownership of the
buffers or mutate them in place don't interfere. By default devices and
modules are reused across iterations but that can be disabled with
`--reuse_devices=false` and `--reuse_modules=false`.

This approach does result in slower overall runs depending on trace
content as libyaml is stupid slow but the timings aren't impacted thanks
to tight scoping. In the future we could have a cached representation of
the traces that keep the buffers around and avoid the need for document
reparsing but I'd rather do that once the workflows around this have
stabilized. I fully expect this tool to be rewritten at some point but
at least now we can run stateful traces and benchmark things like the
caching allocator in real(ish) execution sequences.

Traces look like this, with a special "Timing Active" plot showing when
we're actually timing (during calls):

![image](https://user-images.githubusercontent.com/75337/223591555-a0f9a592-f1f3-40d1-b22f-03affc1b3e97.png)
Zooming in each call event can be seen getting timed:

![image](https://user-images.githubusercontent.com/75337/223591703-5744d63b-a4c4-4ea3-a07a-6bbca373caf5.png)
11 files changed
tree: 6fdeccbb527db78fc653d2b5c174db6e4dbd37d8
  1. .github/
  2. benchmarks/
  3. build_tools/
  4. compiler/
  5. docs/
  6. experimental/
  7. integrations/
  8. lib/
  9. llvm-external-projects/
  10. runtime/
  11. samples/
  12. tests/
  13. third_party/
  14. tools/
  15. .bazelignore
  16. .bazelrc
  17. .bazelversion
  18. .clang-format
  19. .dockerignore
  20. .gitignore
  21. .gitmodules
  22. .pylintrc
  23. .style.yapf
  24. .yamllint.yml
  25. AUTHORS
  26. BUILD.bazel
  27. CITATION.cff
  28. CMakeLists.txt
  29. configure_bazel.py
  30. CONTRIBUTING.md
  31. LICENSE
  32. README.md
  33. WORKSPACE
README.md

IREE: Intermediate Representation Execution Environment

IREE (Intermediate Representation Execution Environment, pronounced as “eerie”) is an MLIR-based end-to-end compiler and runtime that lowers Machine Learning (ML) models to a unified IR that scales up to meet the needs of the datacenter and down to satisfy the constraints and special considerations of mobile and edge deployments.

See our website for project details, user guides, and instructions on building from source.

CI Status

Project Status

IREE is still in its early phase. We have settled down on the overarching infrastructure and are actively improving various software components as well as project logistics. It is still quite far from ready for everyday use and is made available without any support at the moment. With that said, we welcome any kind of feedback on any communication channels!

Communication Channels

Related Project Channels

  • MLIR topic within LLVM Discourse: IREE is enabled by and heavily relies on MLIR. IREE sometimes is referred to in certain MLIR discussions. Useful if you are also interested in MLIR evolution.

Architecture Overview

IREE Architecture IREE Architecture

See our website for more information.

Presentations and Talks

  • 2021-06-09: IREE Runtime Design Tech Talk (recording and slides)
  • 2020-08-20: IREE CodeGen: MLIR Open Design Meeting Presentation (recording and slides)
  • 2020-03-18: Interactive HAL IR Walkthrough (recording)
  • 2020-01-31: End-to-end MLIR Workflow in IREE: MLIR Open Design Meeting Presentation (recording and slides)

License

IREE is licensed under the terms of the Apache 2.0 License with LLVM Exceptions. See LICENSE for more information.