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Merged
merged 4 commits into from
Oct 28, 2022
Merged

Update perf runner details #1482

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04dbf16
Update hyperthreading/turbo boost details.
nnethercote Oct 26, 2022
73654d7
Move perf-runner.md to the `docs/` directory.
nnethercote Oct 26, 2022
df0531c
Add link to PR that did the experimentation.
nnethercote Oct 27, 2022
bf75746
Fix typo.
nnethercote Oct 27, 2022
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3 changes: 2 additions & 1 deletion collector/README.md
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@@ -1,7 +1,8 @@
# Rust Compiler Performance Benchmarking and Profiling

Hardware and software details of the machine that executes the CI details can be found
[here](perf-runner.md).
[here](../docs/perf-runner.md). A glossary of relevant terms can be found
[here](../docs/glossary.md).

## The benchmarks

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9 changes: 5 additions & 4 deletions collector/perf-runner.md → docs/perf-runner.md
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Expand Up @@ -42,11 +42,12 @@ The machine that actually executes the benchmarks in CI has the following config
- OS: Ubuntu `18.04`

## Configuration
### Turboboost
Enabled.
### HyperThreading & Turboboost
As of November 2022, both are disabled.

### HyperThreading
Enabled.
Prior to October 2022, both were enabled. During October 2022 some
[experimentation](https://github.com/rust-lang/rustc-perf/issues/1450) was done
which found that disabling both reduced variance significantly.

### CPU scaling
Scaling governor set to `performance`.
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