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CI experiments - #159628

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CI experiments#159628
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@Mark-Simulacrum Mark-Simulacrum commented Jul 20, 2026 •
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Ignore this, just experimenting.

@rustbot rustbot added A-CI Area: Our Github Actions CI A-testsuite Area: The testsuite used to check the correctness of rustc S-waiting-on-author Status: This is awaiting some action (such as code changes or more information) from the author. T-bootstrap Relevant to the bootstrap subteam: Rust's build system (x.py and src/bootstrap) T-infra Relevant to the infrastructure team, which will review and decide on the PR/issue. labels Jul 20, 2026
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@bors try jobs=dist-x86_64-linux

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rust-bors Bot pushed a commit that referenced this pull request Jul 20, 2026
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Auto merge of #159628 - Mark-Simulacrum:ci-experiments, r=<try>
c3afc75 
CI experiments


try-job: dist-x86_64-linux
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💔 Test for c3afc75 failed: CI. Failed job:

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@bors try jobs=dist-x86_64-linux

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rust-bors Bot pushed a commit that referenced this pull request Jul 20, 2026
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Auto merge of #159628 - Mark-Simulacrum:ci-experiments, r=<try>
613b2ca 
CI experiments


try-job: dist-x86_64-linux
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💔 Test for 613b2ca failed: CI. Failed job:

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@bors try jobs=dist-x86_64-linux

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rust-bors Bot pushed a commit that referenced this pull request Jul 20, 2026
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Auto merge of #159628 - Mark-Simulacrum:ci-experiments, r=<try>
73ee0a8 
CI experiments


try-job: dist-x86_64-linux
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💔 Test for 73ee0a8 failed: CI. Failed job:

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@bors try jobs=dist-x86_64-linux

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rust-bors Bot pushed a commit that referenced this pull request Jul 20, 2026
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Auto merge of #159628 - Mark-Simulacrum:ci-experiments, r=<try>
7bca112 
CI experiments


try-job: dist-x86_64-linux
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💔 Test for 7bca112 failed: CI. Failed job:

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Trying again...

@bors try jobs=dist-x86_64-linux

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rust-bors Bot pushed a commit that referenced this pull request Jul 20, 2026
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Auto merge of #159628 - Mark-Simulacrum:ci-experiments, r=<try>
2427980 
CI experiments


try-job: dist-x86_64-linux
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☀️ Try build successful (CI)
Build commit: 2427980 (24279809799a4368bebba108b9ab746394f4af20)
Base parent: 87e5904 (87e5904f5eb6398af6b22eac2802c78934260c48)

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@bors try

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💔 Test for f6c1e3f failed: CI

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@bors try jobs=dist-aarch64-linux

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rust-bors Bot pushed a commit that referenced this pull request Aug 30, 2026
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Auto merge of #159628 - Mark-Simulacrum:ci-experiments, r=<try>
e7b6ee5 
CI experiments


try-job: dist-aarch64-linux
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☀️ Try build successful (CI)
Build commit: e7b6ee5 (e7b6ee548ede6c3370b723a8128fb0857f1ca9ca)
Base parent: 9085017 (90850177249efe0321573c569aec5d12b257f8d6)

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@bors try jobs=dist-aarch64-linux*

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rust-bors Bot pushed a commit that referenced this pull request Aug 30, 2026
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Auto merge of #159628 - Mark-Simulacrum:ci-experiments, r=<try>
2f7ffe2 
CI experiments


try-job: dist-aarch64-linux*
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☀️ Try build successful (CI)
Build commit: 2f7ffe2 (2f7ffe2f8e913bb60dbda24481c96e9b4dae1bdc)
Base parent: 9085017 (90850177249efe0321573c569aec5d12b257f8d6)

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@bors try

rust-bors Bot pushed a commit that referenced this pull request Aug 30, 2026
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Auto merge of #159628 - Mark-Simulacrum:ci-experiments, r=<try>
00ec0bb 
CI experiments
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💔 Test for 00ec0bb failed: CI

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@bors try jobs=dist-aarch64-linux*

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rust-bors Bot pushed a commit that referenced this pull request Aug 30, 2026
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Auto merge of #159628 - Mark-Simulacrum:ci-experiments, r=<try>
11cca60 
CI experiments


try-job: dist-aarch64-linux*
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☀️ Try build successful (CI)
Build commit: 11cca60 (11cca608a353f95e279cf37c49e209e0db652cfa)
Base parent: 9085017 (90850177249efe0321573c569aec5d12b257f8d6)

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@bors try jobs=dist-x86_64-linux*,dist-aarch64-linux*

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rust-bors Bot pushed a commit that referenced this pull request Aug 31, 2026
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Auto merge of #159628 - Mark-Simulacrum:ci-experiments, r=<try>
7f5c56b 
CI experiments


try-job: dist-x86_64-linux*
try-job: dist-aarch64-linux*
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Switch dist-aarch64-linux to EC2
b4ec0b9 
For full builds, c9g is also faster and cheaper. Since these will be run
in auto we optimize for cost while staying reasonably fast (sorted by
cost):

* c8g.8xl takes 1h20m ($1.69/build)
* c9g.8xl takes 1h ($1.38/build)
* c9g.4xl takes 1h10m ($0.81/build)
* m9g.2xl takes 1h30m ($0.59/build) -- going with this since it's still
  sufficiently fast to never be a long pole and cheapest option

We should be able to afford in our existing AWS credit budget the move
of dist-aarch64-linux from the 2h25m ($2.03/build @ GitHub) it takes on
mainline. For context, dist-x86_64-linux currently takes 1h32m at
$2.64/build on c8a.8xl.

This also adds an optional quick job for aarch64 (off by default, likely
to be added to try in the future for aarch64 perf). For quick builds
duration/cost is:

* c8g.8xl takes 50m ($1.059/build)
* c9g.8xl takes 40m ($0.924/build)
* c9g.4xl takes TODO
* m9g.2xl takes TODO

For context, dist-x86_64-linux-quick takes 60 minutes at $1.72/build on
the current instance (c8a.8xl). We should probably optimize for speed
more than cost here, since this is in critical path for humans, though
the x86_64 quick job may be the long pole depending on where this ends
up used.
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Mark-Simulacrum commented Aug 31, 2026

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@bors try jobs=dist-x86_64-linux*,dist-aarch64-linux*

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rust-bors Bot pushed a commit that referenced this pull request Aug 31, 2026
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Auto merge of #159628 - Mark-Simulacrum:ci-experiments, r=<try>
9ed1c3c 
CI experiments


try-job: dist-x86_64-linux*
try-job: dist-aarch64-linux*
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☀️ Try build successful (CI)
Build commit: 9ed1c3c (9ed1c3c24e52063c95853ca697f21de8e6436c5f)
Base parent: 4b7e3a7 (4b7e3a76d8df78960dc7c65cad43f5da1dac8ade)

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A-CI Area: Our Github Actions CI A-testsuite Area: The testsuite used to check the correctness of rustc S-waiting-on-author Status: This is awaiting some action (such as code changes or more information) from the author. T-bootstrap Relevant to the bootstrap subteam: Rust's build system (x.py and src/bootstrap) T-infra Relevant to the infrastructure team, which will review and decide on the PR/issue.

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