pqos-os fails to perform MBA on my platform and MBA_max delivers barely satisfactory results

[realChocobi]

Issue 1:
I can use pqos-msr to perform MBA. However, when I tried to allocate memory bandwidth in % with pqos-os, I encountered the following error:

Issue 2:
I deployed a C++ program to measure the memory bandwidth, as shown in https://lemire.me/blog/2024/01/13/estimating-your-memory-bandwidth/

When I set the mba_max to a sufficiently large value (80000 MBps), rdtset delivers satisfactory results.

However, when I set the mba_max to 50000 MBps, the memory bandwidth usage of the program first bursts over 70 GB/s, and then falls below 50 GB/s. In this case, the overloaded memory bandwidth usage (> 50 GB/s) lasts for several seconds, which may severely degrade the QoS of latency-critical applications for several seconds.

What's worse, when I set the mba_max to 10000MBps, the program can still consume over 40 GB/s memory bandwidth:

Platform:
Linux Kernel: 5.15.0-113-generic
CPU: Intel(R) Xeon(R) Gold 6148 CPU @ 2.40GHz