EgorBot for saucecontrol in #111853

[EgorBot]

Processing dotnet/runtime#111853 (comment) command:

Command

-amd -intel --envvars DOTNET_EnableAVX512F:0

using BenchmarkDotNet.Running;
using BenchmarkDotNet.Attributes;

using System.Numerics;
using System.Runtime.Intrinsics;
using System.Runtime.Intrinsics.X86;
using System.Runtime.InteropServices;
using System.Runtime.CompilerServices;

BenchmarkSwitcher.FromAssembly(typeof(Program).Assembly).Run(args);

public unsafe class LongBench
{
 private const int nitems = 1 << 10;
 private long* data;

 [GlobalSetup]
 public void Setup()
 {
 const int len = sizeof(long) * nitems;
 data = (long*)NativeMemory.AlignedAlloc(len, 64);
 Random.Shared.NextBytes(new Span<byte>(data, len));
 }

 [Benchmark]
 public Vector128<long> Multiply128()
 {
 long* ptr = data, end = ptr + nitems - Vector128<long>.Count;
 var res = Vector128<long>.Zero;

 while (ptr < end)
 {
 res ^= Vector128.LoadAligned(ptr) * Vector128.LoadAligned(ptr + Vector128<long>.Count);
 ptr += Vector128<long>.Count;
 }

 return res;
 }

 [Benchmark]
 public Vector256<long> Multiply256()
 {
 long* ptr = data, end = ptr + nitems - Vector256<long>.Count;
 var res = Vector256<long>.Zero;

 while (ptr < end)
 {
 res ^= Vector256.LoadAligned(ptr) * Vector256.LoadAligned(ptr + Vector256<long>.Count);
 ptr += Vector256<long>.Count;
 }

 return res;
 }

 [Benchmark]
 public Vector<long> MultiplyVectorT()
 {
 long* ptr = data, end = ptr + nitems - Vector<long>.Count;
 var res = Vector<long>.Zero;

 while (ptr < end)
 {
 res ^= Vector.Load(ptr) * Vector.Load(ptr + Vector256<long>.Count);
 ptr += Vector<long>.Count;
 }

 return res;
 }
}

(EgorBot will reply in this issue)

[EgorBot]

Benchmark results on linux_azure_genoa

BenchmarkDotNet v0.14.0, Ubuntu 24.04.2 LTS (Noble Numbat)
AMD EPYC 9V74, 1 CPU, 8 logical and 4 physical cores
 Job-HIPFUZ : .NET 10.0.0 (42.42.42.42424), X64 RyuJIT AVX2
 Job-PFYIEK : .NET 10.0.0 (42.42.42.42424), X64 RyuJIT AVX2
EnvironmentVariables=DOTNET_EnableAVX512F=0

Method	Toolchain	Mean	Error	Ratio
Multiply128	Main	423.5 ns	0.09 ns	1.00
Multiply128	PR	370.2 ns	0.08 ns	0.87
Multiply256	Main	213.9 ns	0.04 ns	1.00
Multiply256	PR	186.6 ns	0.06 ns	0.87
MultiplyVectorT	Main	213.7 ns	0.05 ns	1.00
MultiplyVectorT	PR	182.6 ns	0.27 ns	0.85

BDN_Artifacts.zip

cc @saucecontrol (agent_logs.txt). EgorBot manual: link.

[EgorBot]

Benchmark results on linux_azure_cascadelake

BenchmarkDotNet v0.14.0, Ubuntu 24.04.2 LTS (Noble Numbat)
Intel Xeon Platinum 8370C CPU 2.80GHz, 1 CPU, 8 logical and 4 physical cores
 Job-LSMVEA : .NET 10.0.0 (42.42.42.42424), X64 RyuJIT AVX2
 Job-TUGWTL : .NET 10.0.0 (42.42.42.42424), X64 RyuJIT AVX2
EnvironmentVariables=DOTNET_EnableAVX512F=0

Method	Toolchain	Mean	Error	Ratio
Multiply128	Main	574.7 ns	0.21 ns	1.00
Multiply128	PR	508.6 ns	0.03 ns	0.88
Multiply256	Main	291.5 ns	0.05 ns	1.00
Multiply256	PR	256.8 ns	0.18 ns	0.88
MultiplyVectorT	Main	292.7 ns	0.04 ns	1.00
MultiplyVectorT	PR	255.1 ns	0.01 ns	0.87

BDN_Artifacts.zip

cc @saucecontrol (agent_logs.txt). EgorBot manual: link.