cpum_sf.a24924 AUX buffer size (<Current AUX buffer size in num of pages> pages) is larger than the maximum sampling buffer limit
Explanation
The CPU-measurement sampling facility uses an AUX buffer
to hold sampling data until it is consumed by an application, for example, perf.
The AUX buffer size must not exceed the maximum sampling buffer limit.
User response
Repeat your measurements with a smaller AUX buffer.
If you are using perf, you can set the buffer size with the -m option.
Use lscpumf to see the maximum sampling buffer size.