Skip to content

Enable multithreaded MSBuild for local and PR builds #10726

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Draft
Jan Provazník (JanProvaznik) wants to merge 2 commits into
base: main
Choose a base branch
from
+15 −2
Draft

Enable multithreaded MSBuild for local and PR builds #10726

Show file tree
Hide file tree
Changes from all commits
Commits
Show all changes
2 commits
Select commit Hold shift + click to select a range
ca552a2
Enable multithreaded MSBuild for local and PR builds
JanProvaznik Aug 25, 2026
8a675a1
Separate multithreaded and cached CI builds
JanProvaznik Aug 25, 2026
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
12 changes: 10 additions & 2 deletions azure-pipelines.yml
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -256,13 +256,16 @@ stages:
displayName: Preserve cache diagnostics and clean failed seed outputs
condition: and(always(), ne(variables['MSBuildCacheBuildSucceeded'], 'true'))

# Keep the cache support packages out of the multithreaded fallback. Their unannotated
# ResolveFileAccesses task currently fails in MSBuild's sidecar task host under -mt.
- script: eng\common\CIBuild.cmd
-configuration $(_BuildConfig)
-msbuildMultiThreaded 1
-prepareMachine
/p:Publish=false
/p:Test=false
/p:FastAcceptanceTest=true
/p:MSBuildCachePackageEnabled=true
/p:MSBuildCachePackageEnabled=false
/p:MSBuildCacheEnabled=false
name: Build
displayName: Build
Expand Down Expand Up @@ -705,13 +708,16 @@ stages:

# Fallback build. Skipped when the MSBuildCache steps above already produced, signed and packed the
# outputs; also skipped when they failed with build errors, because this step would only reproduce them.
# Keep the cache support packages out of this multithreaded build because their unannotated
# ResolveFileAccesses task currently fails in MSBuild's sidecar task host under -mt.
- script: eng\common\CIBuild.cmd
-configuration $(_BuildConfig)
-msbuildMultiThreaded 1
-prepareMachine
/p:Publish=false
/p:Test=false
/p:FastAcceptanceTest=true
/p:MSBuildCachePackageEnabled=true
/p:MSBuildCachePackageEnabled=false
/p:MSBuildCacheEnabled=false
name: Build
displayName: Build
Expand Down Expand Up @@ -850,6 +856,7 @@ stages:
steps:
- script: eng/common/cibuild.sh
-configuration $(_BuildConfig)
-msbuildMultiThreaded true
-prepareMachine
/p:Test=false
/p:Publish=false
Expand Down Expand Up @@ -889,6 +896,7 @@ stages:
steps:
- script: eng/common/cibuild.sh
-configuration $(_BuildConfig)
-msbuildMultiThreaded true
-prepareMachine
/p:Test=false
/p:Publish=false
Expand Down
5 changes: 5 additions & 0 deletions eng/build.ps1
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -7,6 +7,7 @@ Param(
[string] $msbuildEngine = $null,
[bool] $warnAsError = $true,
[bool] $nodeReuse = $true,
[bool][Alias('mt')]$msbuildMultiThreaded = $false,
[switch][Alias('r')]$restore,
[switch] $deployDeps,
[switch][Alias('b')]$build,
Expand Down Expand Up @@ -82,4 +83,8 @@ if ($installWindowsSdk) {
$null = $PSBoundParameters.Remove("vs")
$null = $PSBoundParameters.Remove("installWindowsSdk")

if (-not $PSBoundParameters.ContainsKey("msbuildMultiThreaded")) {
$PSBoundParameters["msbuildMultiThreaded"] = -not $ci
Comment on lines +86 to +87
}

& $PSScriptRoot\common\Build.ps1 @PSBoundParameters
Loading