Implemented overriding crank behavior for ASP.NET Benchmarks

src/benchmarks/gc/GC.Infrastructure/GC.Infrastructure.Core/CommandBuilders/ASPNetBenchmarks.CommandBuilder.cs

@@ -121,7 +121,53 @@ public static (string, string) Build(ASPNetBenchmarksConfiguration configuration
             // Add the extra metrics by including the configuration.
             commandStringBuilder.Append($" --config {Path.Combine("Commands", "RunCommand", "BaseSuite", "PercentileBasedMetricsConfiguration.yml")} ");
 
-            return (processName, commandStringBuilder.ToString());
+            string commandString = commandStringBuilder.ToString();
+
+            // Apply overrides.
+            if (!string.IsNullOrEmpty(configuration.benchmark_settings.override_arguments))
+            {
+                List<KeyValuePair<string, string>> overrideCommands = GetCrankArgsAsList(configuration.benchmark_settings.override_arguments);
+                if (overrideCommands.Count > 0) 
+                {
+                    // Take the current commands and first replace all the keys that match the override commands.
+                    // Subsequently, add the new overrides and then convert the key-value pair list back to a string.
+                    List<KeyValuePair<string, string>> currentCommands = GetCrankArgsAsList(commandString);
+                    foreach (var item in overrideCommands)
+                    {
+                        var existing = currentCommands.Where(kv => kv.Key == item.Key).ToList();
+                        foreach (var kv in existing)
+                        {
+                            if (kv.Key != null)
+                            {
+                                currentCommands.Remove(kv);
+                            }
+                        }
+
+                        currentCommands.Add(item);
+                    }
+
+                    commandString = string.Join(" ", currentCommands.Select(c => $"--{c.Key} {c.Value}"));
+                }
+            }
+
+            return (processName, commandString);
+        }
+
+        internal static List<KeyValuePair<string, string>> GetCrankArgsAsList(string input)
+        {
+            var keyValuePairs = new List<KeyValuePair<string, string>>();
+            var splitStr = input.Split(new[] { "--" }, StringSplitOptions.RemoveEmptyEntries);
+
+            foreach (var item in splitStr)
+            {
+                var keyValue = item.Split(' ', StringSplitOptions.RemoveEmptyEntries | StringSplitOptions.TrimEntries);
+                if (keyValue.Length == 2)
+                {
+                    keyValuePairs.Add(new KeyValuePair<string, string>(keyValue[0], keyValue[1]));
+                }
+            }
+
+            return keyValuePairs;
         }
     }
 }

src/benchmarks/gc/GC.Infrastructure/GC.Infrastructure.Core/Configurations/ASPNetBenchmark.Configuration.cs

@@ -25,6 +25,7 @@ public class BenchmarkSettings
     {
         public string? benchmark_file { get; set; }
         public string additional_arguments { get; set; } = "";
+        public string? override_arguments { get; set; } = "";
         public List<string> benchmarkFilters { get; set; } = new();
     }
 

src/benchmarks/gc/GC.Infrastructure/README.md

@@ -222,6 +222,19 @@ benchmark_settings:
 
 If there is a match, these filters will run in the order specified in the yaml file.
 
+###### How To Override Parameters
+
+You can override parameters specified in the benchmark csv file by replacing all instances of the command arg with values in the `override_arguments` field.
+
+```yaml
+benchmark_settings:
+  benchmark_file: C:\InfraRuns\RunNew_All\Suites\ASPNETBenchmarks\ASPNetBenchmarks.csv
+  additional_arguments: --chart --chart-type hex 
+  override_arguments: --profile aspnet-citrine-win
+```
+
+As an example based on the configuration immediately above, all `--profile` values will be replaces with `--profile aspnet-citrine-win`.
+
 ## All Commands
 
 The infrastructure can be run in modular manner. What this means is that you can invoke a particular command that runs some part of the infrastructure. A list of all the commands can be found here: