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Multiple release builds deadlocks on Windows flutter_release_builder #168934

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Multiple release builds deadlocks on Windows flutter_release_builder#168934
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matanlurey
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P1High-priority issues at the top of the work listinfra: chromiuminfra: recipesIssues with flutter/recipesinfra: releaseRelease-related requests and toolingteam-infraOwned by Infrastructure teamtriaged-infraTriaged by Infrastructure team
@matanlurey

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@matanlurey
matanlurey
opened on May 15, 2025

We have 5 32x CPU builders allocated to the release-pool.

As defined in engine/src/flutter/.ci.yaml we have 2 orchestrator builds for Windows:

flutter/engine/src/flutter/.ci.yaml

Lines 502 to 524 in cdd6be4

- name: Windows windows_android_aot_engine
recipe: engine_v2/engine_v2
timeout: 120
properties:
add_recipes_cq: "true"
release_build: "true"
config_name: windows_android_aot_engine
# Do not remove(https://github.com/flutter/flutter/issues/144644)
# Scheduler will fail to get the platform
drone_dimensions:
- os=Windows
- name: Windows windows_host_engine
recipe: engine_v2/engine_v2
timeout: 120
properties:
add_recipes_cq: "true"
release_build: "true"
config_name: windows_host_engine
# Do not remove(https://github.com/flutter/flutter/issues/144644)
# Scheduler will fail to get the platform
drone_dimensions:
- os=Windows

For the release process, each of these uses one of our (very limited) 5 32x CPU builders just to spawn other (actual) builders:

When multiple builds are running, (i.e. 2), 4 of the 5 builders are used for orchestration!

We should try to move these to Linux-based orchestrators - there is no reason to use a Windows build at the moment.

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P1High-priority issues at the top of the work listinfra: chromiuminfra: recipesIssues with flutter/recipesinfra: releaseRelease-related requests and toolingteam-infraOwned by Infrastructure teamtriaged-infraTriaged by Infrastructure team

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