Runtime knobs

In CoreCLR, we have a list of knobs which can be specified.

In Mono, we can set some command line arguments (like --optimize=OPT or --gc=[sgen,boehm]) and environment variables (like GC_DONT_GC or MONO_GAC_PREFIX, see also https://linux.die.net/man/1/mono).

I think, it would be cool to have an ability to specify some of knobs/arguments as a part of Job.

[adamsitnik]

Done 😉

You can specify env variables or mono arguments per job now.

Example:

public class IntroCustomMonoArguments
{
    public class ConfigWithCustomArguments : ManualConfig
    {
        public ConfigWithCustomArguments()
        {
            // --optimize=MODE , -O=mode
            // MODE is a comma separated list of optimizations. They also allow
            // optimizations to be turned off by prefixing the optimization name with a minus sign.

            Add(Job.Mono.With(new[] { new MonoArgument("--optimize=inline") }).WithId("Inlining enabled"));
            Add(Job.Mono.With(new[] { new MonoArgument("--optimize=-inline") }).WithId("Inlining disabled"));
        }
    }

    [Benchmark]
    public void Sample()
    {
        ShouldGetInlined(); ShouldGetInlined(); ShouldGetInlined();
        ShouldGetInlined(); ShouldGetInlined(); ShouldGetInlined();
        ShouldGetInlined(); ShouldGetInlined(); ShouldGetInlined();
    }

    void ShouldGetInlined() { }
}

BenchmarkDotNet=v0.10.9.20170903-develop, OS=Windows 10 Redstone 1 (10.0.14393)
Processor=Intel Core i7-6600U CPU 2.60GHz (Skylake), ProcessorCount=4
Frequency=2742190 Hz, Resolution=364.6720 ns, Timer=TSC
  [Host]            : .NET Framework 4.7 (CLR 4.0.30319.42000), 64bit RyuJIT-v4.7.2101.1
  Inlining disabled : Mono 5.0.1 (Visual Studio), 32bit 
  Inlining enabled  : Mono 5.0.1 (Visual Studio), 32bit 

Runtime=Mono  

Method	Job	Arguments	Mean	Error	StdDev
Sample	Inlining disabled	–optimize=-inline	19.4252 ns	0.4406 ns	0.4525 ns
Sample	Inlining enabled	–optimize=inline	0.0000 ns	0.0000 ns	0.0000 ns

[AndreyAkinshin]

Awesome!