EgorBot for EgorBo in #109466

[EgorBot]

Processing https://github.com/dotnet/runtime/pull/109466#issuecomment-2453485256 command:

Command

-intel -arm64 --envvars DOTNET_JitDisasm:Test ```cs using BenchmarkDotNet.Attributes; public class C { private static readonly int[] _perm = [1, 2, 3, 4]; private int Index = 1; [Benchmark] public int Test() { int index = Index; return _perm[index & (_perm.Length - 1)]; } } ```

(EgorBot will reply in this issue)

[EgorBot]

Benchmark results on Linux-SapphireLake

BenchmarkDotNet v0.14.0, Ubuntu 24.04 LTS (Noble Numbat)
Intel Xeon Platinum 8488C, 1 CPU, 16 logical and 8 physical cores
  Job-JTPMZQ : .NET 10.0.0 (42.42.42.42424), X64 RyuJIT AVX-512F+CD+BW+DQ+VL+VBMI
  Job-CIOAIL : .NET 10.0.0 (42.42.42.42424), X64 RyuJIT AVX-512F+CD+BW+DQ+VL+VBMI
EnvironmentVariables=DOTNET_JitDisasm=Test

Method	Toolchain	Mean	Error	Ratio
Test	Main	0.2974 ns	0.0308 ns	1.01
Test	PR	0.0036 ns	0.0074 ns	0.01

BDN_Artifacts.zip

[EgorBot]

cc @EgorBo (logs)

[EgorBo]

@EgorBot -gcp_intel

using BenchmarkDotNet.Attributes;

public class C
{
    private static readonly int[] _perm = [1, 2, 3, 4];

    private int Index = 1;

    [Benchmark]
    public int Test()
    {
        int index = Index;
        return _perm[index & (_perm.Length - 1)];
    }
}

[EgorBot]

❌ emeraldrapids can't be used with linux. See:

Targets:             OSes:

azure_ampere         linux
azure_milano         linux
azure_icelake        linux
azure_cobalt100      linux
azure_genoa          linux

aws_m1               macos
aws_m1ultra          macos
aws_m2               macos
aws_m2pro            macos
aws_macx86           macos
aws_sapphirelake     linux, windows
aws_icelake          linux, windows
aws_genoa            linux, windows
aws_milano           linux, windows
aws_graviton2        linux
aws_graviton3        linux
aws_graviton4        linux

gcp_ampere           linux
gcp_axion            linux
gcp_milano           linux
gcp_cascadelake      linux
gcp_sapphirelake     linux
gcp_emeraldrapids    linux

[EgorBot]

cc @EgorBo

[EgorBo]

@EgorBot -gcp_intel

using BenchmarkDotNet.Attributes;

public class C
{
    private static readonly int[] _perm = [1, 2, 3, 4];

    private int Index = 1;

    [Benchmark]
    public int Test()
    {
        int index = Index;
        return _perm[index & (_perm.Length - 1)];
    }
}

[EgorBo]

@EgorBot -gcp_intel

using BenchmarkDotNet.Attributes;

public class C
{
    private static readonly int[] _perm = [1, 2, 3, 4];

    private int Index = 1;

    [Benchmark]
    public int Test()
    {
        int index = Index;
        return _perm[index & (_perm.Length - 1)];
    }
}

[EgorBo]

@EgorBot -gcp_intel

using BenchmarkDotNet.Attributes;

public class C
{
    private static readonly int[] _perm = [1, 2, 3, 4];

    private int Index = 1;

    [Benchmark]
    public int Test()
    {
        int index = Index;
        return _perm[index & (_perm.Length - 1)];
    }
}

[EgorBot]

Benchmark results on Debian12-emeraldrapids

BenchmarkDotNet v0.14.0, Debian GNU/Linux 12 (bookworm)
INTEL XEON PLATINUM 8581C CPU 2.30GHz, 1 CPU, 4 logical and 2 physical cores
DefaultJob : .NET 9.0.0 (9.0.24.47305), X64 RyuJIT AVX-512F+CD+BW+DQ+VL+VBMI
StdDev=0.0064 ns  Median=0.0057 ns

Method	Mean	Error
Test	0.0086 ns	0.0068 ns

BDN_Artifacts.zip

[EgorBot]

cc @EgorBo (logs)