Coldstart pipeline enhancements

eng/ci/host.coldstart.yml

@@ -65,6 +65,11 @@ resources:
 variables:
   - template: /eng/ci/templates/variables/coldstart.yml@self
   - template: /ci/variables/cfs.yml@eng
+  - name: shouldCollectPerfViewProfileOnWindows
+    ${{ if eq(variables['Build.Reason'], 'Schedule') }}:  # We always collect PerfView profile on nightly runs.
+      value: true
+    ${{ if ne(variables['Build.Reason'], 'Schedule') }}:
+      value: ${{ parameters.collectPerfViewProfileOnWindows }}
 
 extends:
   template: v1/1ES.Unofficial.PipelineTemplate.yml@1es
@@ -85,7 +90,7 @@ extends:
               description: .NET9 Web Application
               functionAppName: HelloHttpNet9
               instanceId: ${{ appId }} 
-              collectPerfViewProfileOnWindows: ${{ parameters.collectPerfViewProfileOnWindows }}
+              collectPerfViewProfileOnWindows: ${{ variables.shouldCollectPerfViewProfileOnWindows }}
               perfViewCollectArguments: ${{ parameters.perfViewCollectArguments }}
               netTraceCollectArguments: ${{ parameters.netTraceCollectArguments }}
               collectNetTrace: ${{ parameters.collectNetTrace }}
@@ -96,7 +101,7 @@ extends:
               description: .NET9 Worker Application
               functionAppName: HelloHttpNet9NoProxy
               instanceId: ${{ appId }}
-              collectPerfViewProfileOnWindows: ${{ parameters.collectPerfViewProfileOnWindows }}
+              collectPerfViewProfileOnWindows: ${{ variables.shouldCollectPerfViewProfileOnWindows }}
               perfViewCollectArguments: ${{ parameters.perfViewCollectArguments }}
               netTraceCollectArguments: ${{ parameters.netTraceCollectArguments }}
               collectNetTrace: ${{ parameters.collectNetTrace }}
@@ -107,7 +112,7 @@ extends:
               description: Node Application
               functionAppName: HelloHttpNode
               instanceId: ${{ appId }}
-              collectPerfViewProfileOnWindows: ${{ parameters.collectPerfViewProfileOnWindows }}
+              collectPerfViewProfileOnWindows: ${{ variables.shouldCollectPerfViewProfileOnWindows }}
               perfViewCollectArguments: ${{ parameters.perfViewCollectArguments }}
               netTraceCollectArguments: ${{ parameters.netTraceCollectArguments }}
               collectNetTrace: ${{ parameters.collectNetTrace }}

eng/ci/templates/official/jobs/run-coldstart.yml

@@ -47,7 +47,6 @@ jobs:
   variables:
     functionAppOutputPath: $(Build.BinariesDirectory)/Published/${{ parameters.functionAppName }}
     hostOutputPath: $(Build.BinariesDirectory)/Published/HostRuntime
-    hostAssemblyPath: $(hostOutputPath)/Microsoft.Azure.WebJobs.Script.WebHost.dll
     logsDirectory: $(Build.ArtifactStagingDirectory)/Logs
     stdOutLogsFilePath: $(logsDirectory)/std_out_logs.txt
     stdErrorLogsFilePath: $(logsDirectory)/std_error_logs.txt
@@ -66,8 +65,7 @@ jobs:
     traceFileZipName: $(traceFileName).zip
     traceFilePath: $(traceDirectory)/$(traceFileName)
     traceZipFilePath: $(traceDirectory)/$(traceFileZipName)
-    traceAnalysisResultsDirectory: $(netTraceDirectory)/results
-    traceAnalysisResultMarkdownFilePath: $(traceAnalysisResultsDirectory)/$(traceFileNameWithoutExtension).md
+    traceAnalysisResultMarkdownFilePath: $(traceDirectory)/results/$(traceFileNameWithoutExtension).md
     traceLogPath: $(logsDirectory)/logs.log
     ${{ if eq(parameters.os, 'Linux') }}:
       publishRid: linux-x64
@@ -112,12 +110,8 @@ jobs:
 
   - template: /eng/ci/templates/install-dotnet.yml@self
 
-  - task: UseDotNet@2 
-    displayName: Install .NET 10
-    inputs:
-      packageType: sdk
-      version: 10.x
-      includePreviewVersions: true
+  - script: dotnet --info
+    displayName: "Print .NET Environment Info"
 
   - ${{ if eq(parameters.functionAppName, 'HelloHttpNode') }}:
     - task: CopyFiles@2
@@ -216,7 +210,6 @@ jobs:
 
   - ${{ if and(eq(parameters.collectPerfViewProfileOnWindows, true), eq(parameters.instanceId, '1')) }}: # collect profile only on the first instance
     - pwsh: |
-        New-Item -ItemType Directory -Path $(traceDirectory)
         if (Test-Path $(perfViewPath)) {
             $collectArguments = ${env:COLLECT_ARGUMENTS}
             Write-Host "PerfView.exe found. Executing with arguments '$collectArguments'"
@@ -280,8 +273,14 @@ jobs:
         $attempt = 0
 
         while ($attempt -lt $maxAttempts) {
-            $files = Get-ChildItem -Path $(traceDirectory)
+            $files = Get-ChildItem -Path $(traceDirectory) -File
             $fileCount = $files.Count
+
+            Write-Host "Found $fileCount file(s) in $(traceDirectory):"
+            foreach ($file in $files) {
+                Write-Host "  - $($file.Name)"
+            }
+
             if ($fileCount -eq 1 -and $files[0].Name -eq '$(traceFileZipName)') {
                 break
             } else {

eng/ci/templates/variables/coldstart.yml

@@ -1,4 +1,4 @@
 variables:
 # This controls how many cold start samples are collected for each app+OS combination.
 - name: runInstances
-  value: "1,2,3,4,5,6,7,8,9,10"
+  value: "1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20"

release_notes.md

@@ -14,3 +14,4 @@
 - Avoid setting up OTel and AzMon exporter in the placeholder mode. (#11090)
 - Update Java Worker Version to [2.19.1](https://github.com/Azure/azure-functions-java-worker/releases/tag/2.19.1)
 - Memory allocation optimizations in `FeatureFlags.IsEnabled` by adopting zero-allocation `ContainsToken` for efficient delimited token search (#11075)
+- Improvements to coldstart pipeline (#11102).