Hastlayer-SDK

using Hast.Layer;
using Hast.Samples.SampleAssembly;
using Lombiq.HelpfulLibraries.Common.Utilities;
using System;
using System.Threading.Tasks;

namespace Hast.Samples.Consumer.SampleRunners;

internal sealed class Fix64CalculatorSampleRunner : ISampleRunner
{
    public void Configure(HardwareGenerationConfiguration configuration) =>
        configuration.AddHardwareEntryPointType<Fix64Calculator>();

    public async Task RunAsync(IHastlayer hastlayer, IHardwareRepresentation hardwareRepresentation, IProxyGenerationConfiguration configuration)
    {
        var fixed64Calculator = await hastlayer.GenerateProxyAsync(hardwareRepresentation, new Fix64Calculator(), configuration);
        _ = fixed64Calculator.CalculateIntegerSumUpToNumber(10_000_000, hastlayer, hardwareRepresentation.HardwareGenerationConfiguration);

        // This takes about 274ms on an i7 processor with 4 physical (8 logical) cores and 1300ms on an FPGA (with a
        // MaxDegreeOfParallelism of 12 while the device is about half utilized; above that the design will get
        // unstable). Since this basically does what the single-threaded sample but in multiple copies on multiple
        // threads the single-threaded sample takes the same amount of time on the FPGA.

        // Creating an array of numbers alternating between 9999999 and 10000001 so we can also see that threads don't
        // step on each other's feet.
        var numbers = new int[Fix64Calculator.MaxDegreeOfParallelism];
        for (int i = 0; i < Fix64Calculator.MaxDegreeOfParallelism; i++)
        {
            numbers[i] = 10_000_000 + (i % 2 == 0 ? -1 : 1);
        }

        fixed64Calculator.ParallelizedCalculateIntegerSumUpToNumbers(
            numbers,
            hastlayer,
            hardwareRepresentation.HardwareGenerationConfiguration);
    }

    public static void RunSoftwareBenchmark()
    {
        var fixed64Calculator = new Fix64Calculator();

        var numbers = new int[Fix64Calculator.MaxDegreeOfParallelism];
        for (int i = 0; i < Fix64Calculator.MaxDegreeOfParallelism; i++)
        {
            numbers[i] = 10_000_000 + (i % 2 == 0 ? -1 : 1);
        }

        _ = fixed64Calculator.ParallelizedCalculateIntegerSumUpToNumbers(numbers);

        var sw = System.Diagnostics.Stopwatch.StartNew();
        _ = fixed64Calculator.ParallelizedCalculateIntegerSumUpToNumbers(numbers);
        sw.Stop();
        Console.WriteLine(StringHelper.ConcatenateConvertiblesInvariant("Elapsed ms: ", sw.ElapsedMilliseconds));
    }
}