kshyju

Generating JIT Trace or Measuring Cold Start Impact

1. Prepare Your Code

The Cold Start Pipeline is set up in the internal Azure DevOps (ADO) repo. To use it:

• Push your code to the ADO repo. If you haven't already, add the ADO remote to your Git setup:

Add ADO remote

kshyju

variables:
  headers:
    none: ''
    plaintext: '--header "Accept: text/plain,text/html;q=0.9,application/xhtml+xml;q=0.9,application/xml;q=0.8,*/*;q=0.7" --header "Connection: keep-alive"'
    html: '--header "Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8" --header "Connection: keep-alive"'
    json: '--header "Accept: application/json,text/html;q=0.9,application/xhtml+xml;q=0.9,application/xml;q=0.8,*/*;q=0.7" --header "Connection: keep-alive"'
    connectionclose: '--header "Connection: close"'
  presetHeaders: none

jobs:

kshyju

2024-12-16 19:43:01,400 16480 [DEBUG] - _ Chocolatey:ChocolateyInstallCommand - Normal Run Mode _
2024-12-16 19:43:01,416 16480 [INFO ] - Installing the following packages:
2024-12-16 19:43:01,416 16480 [INFO ] - sysinternals
2024-12-16 19:43:01,416 16480 [INFO ] - By installing, you accept licenses for the packages.
2024-12-16 19:43:01,528 16480 [DEBUG] - Process Tree: Chocolatey CLI => Chocolatey CLI => powershell => WindowsTerminal => explorer
2024-12-16 19:43:01,540 16480 [DEBUG] - Updating User Agent to 'Chocolatey Command Line/2.4.1 (Chocolatey CLI) via NuGet Client/6.4.1 (Microsoft Windows NT 10.0.26100.0)'.
2024-12-16 19:43:01,607 16480 [DEBUG] - Running list with the following filter = ''
2024-12-16 19:43:01,607 16480 [DEBUG] - --- Start of List ---
2024-12-16 19:43:01,624 16480 [DEBUG] - Process Tree: Chocolatey CLI => Chocolatey CLI => powershell => WindowsTerminal => explorer
2024-12-16 19:43:01,624 16480 [DEBUG] - Updating User Agent to 'Chocolatey Command Line/2.4.1 (Chocolatey CLI) via NuGet Cl

kshyju

# Create a directory
$directoryPath = "C:\ExampleDirectory"
New-Item -ItemType Directory -Path $directoryPath -Force

# Create a file in the directory
$filePath = "$directoryPath\example.txt"
"Hello, World!" | Out-File -FilePath $filePath

# Output the result
Write-Output "Directory and file created successfully."

kshyju

param(
    [string]$ParametersJsonBase64,
    [string]$WindowsLocalAdminUserName,
    [string]$WindowsLocalAdminPasswordBase64)

$ErrorActionPreference = 'Stop'


function ScheduleCrankAgentStart {
    Write-Verbose 'Scheduling crank-agent start...'

kshyju

# Use Ubuntu 20.04 as the base image
FROM ubuntu:20.04

# Set environment variables
ENV DEBIAN_FRONTEND=noninteractive

# Install essential packages and dependencies
RUN apt-get update && \
    apt-get install -y \
        wget \

kshyju

{
      "4.68.0": {
      "templates": "https://functionscdn.azureedge.net/public/TemplatesApi/3.1.1648.zip",
      "workerRuntimes": {
        "dotnet": {
          "net6": {
            "displayInfo": {
              "displayName": ".NET 6.0",
              "hidden": false,
              "displayVersion": "v4",

kshyju

Minimal repro app

https://github.com/kshyju/DotnetAppLoader/tree/case_2-aot-e2e-fails

Exception

Grpc.Core.RpcException: Status(StatusCode="Unavailable", Detail="Error connecting to subchannel.", DebugException="System.Net.Sockets.SocketException: Unknown error (0xffffffff)") ---> System.Net.Sockets.SocketException (0xFFFFFFFF): Unknown error (0xffffffff) at System.Net.Sockets.Socket.AwaitableSocketAsyncEventArgs.ThrowException(SocketError, CancellationToken) + 0x47 at System.Net.Sockets.Socket.AwaitableSocketAsyncEventArgs.System.Threading.Tasks.Sources.IValueTaskSource.GetResult(Int16) + 0x4e at System.Net.Sockets.Socket.<g__WaitForConnectWithCancellation|285_0>d.MoveNext() + 0x18f

kshyju

{
  "4.63.0": {
    "templates": "https://functionscdn.azureedge.net/public/TemplatesApi/3.1.1648.zip",
    "workerRuntimes": {
      "dotnet": {
        "net6": {
          "displayInfo": {
            "displayName": ".NET 6.0",
            "hidden": false,
            "displayVersion": "v4",

kshyju

using BenchmarkDotNet.Attributes;

namespace Benchmarks
{
    public record Foo(string Name, string Value, int category);

    [MemoryDiagnoser]
    public class LinqBenchmarks
    {
        private IEnumerable<Foo> items;