Unable to run Perfcollector .NET 8 core

### Type of issue

Missing information

### Description

To enable the perf collector on K8 Linux container, on Linux VM (in AKS Linux Gen05 nodes) for .NET Core 8, we followed the following steps (following this guide https://learn.microsoft.com/en-us/dotnet/core/diagnostics/trace-perfcollect-lttng) still we are getting following error.

Running "/usr/bin/lttng add-context --kernel -t pid -t procname"
Error: pid: Kernel tracer not available
Error: procname: Kernel tracer not available

Here are the steps for reference:

1 curl -OL https://aka.ms/perfcollect
2 apt updat
3 apt update
4 apt install curl
5 curl -OL https://aka.ms/perfcollect
6 chmod +x perfcollect
7 sudo ./perfcollect install
8 dotnet tool install --global dotnet-symbol
9 mkdir mySymbolsNet8
10 ~/.dotnet/tools/dotnet-symbol --output ./mySymbolsNet8/ /usr/share/dotnet/shared/Microsoft.NETCore.App/8.0.0/lib*.so
11 cp ./mySymbolsNet8/* /usr/share/dotnet/shared/Microsoft.NETCore.App/8.0.0/
12 apt-get install linux-tools-5.15.0-1041-azure -y
13 cp /usr/lib/linux-tools/5.15.0-1041-azure/perf /usr/bin/perf
14 ps -ef | grep -i dotnet
15 export DOTNET_EnableWriteXorExecute=0
16 sudo ./perfcollect collect a -pid 166
[perfcollector.log](https://github.com/dotnet/docs/files/13817098/perfcollector.log)

Please provide us the missing/updated steps

### Page URL

https://learn.microsoft.com/en-us/dotnet/core/diagnostics/trace-perfcollect-lttng

### Content source URL

https://github.com/dotnet/docs/blob/main/docs/core/diagnostics/trace-perfcollect-lttng.md

### Document Version Independent Id

ac6cc555-a033-766d-0597-bd9bda98820f

### Article author

@tommcdon

### Metadata

* ID: 7dd230f8-907f-5f07-e3ab-7ad37fee3aa4
* Product: **dotnet-fundamentals**