Unable to read some hardware counters on ZEN2 CPU · dotnet/BenchmarkDotNet#1520

(18 留言) (3 反應) (0 負責人)C# (11,415 star) (1,054 fork)batch import

Area:Diagnosersgood first issueup-for-grabs

描述

Having trouble reading 'CacheMisses' and 'InstructionsRetired' whenever I run the dotnet/performance benchmark suite. If I run the command from within the src\benchmarks\micro directory:

dotnet run -c Release -f netcoreapp5.0 --filter '*Bilinear*' --counters CacheMisses InstructionsRetired

I get the following error message:

// Validating benchmarks:
The counter CacheMisses is not available. Please make sure you are Windows 8+ without Hyper-V
The counter InstructionRetired is not available. Please make sure you are Windows 8+ without Hyper-V

I am able to get some counters to read by enabling IBS in my BIOS (technically wasn't called IBS, I had to disable SVM to get it to work). So the following command does work for me:

dotnet run -c Release -f netcoreapp5.0 --filter '*Bilinear*' --counters BranchMispredictions

If I profile a C# application outside of BenchmarkDotNet using AMD uProf, I can get cache miss and instructions retired statistics. I am also able to read all of the counters on my Skylake machine using the BenchmarkDotNet CLI without any issues.

Would appreciate any help that can be provided!

貢獻者指南

技術棧: csharp
領域: performance
議題類型: bug
難度: 3
預計時間: 3-5 days
活動狀態: stale
清晰度: mostly clear
前置要求: basic understanding of .NETfamiliarity with hardware performance countersWindows 8+ environment
新手友善度: 30
研究方向: Investigate the hardware counter provider in BenchmarkDotNet's source code, particularly the Windows specific implementation for reading performance counters. The issue may be related to AMD ZEN2 specific counter availability or BIOS settings. Look into the error message generation in the counter validation logic and compare with AMD uProf's approach. Test on a ZEN2 machine with different BIOS configurations to isolate the cause.