On 2/16/24 10:20, Alexander Monakov wrote:
FWIW, in situations like these I always recommend to run perf with fixed sampling rate, i.e. 'perf record -e cycles:P -c 100000' or 'perf record -e cycles/period=100000/P' to make sample counts between runs of different duration directly comparable (displayed with 'perf report -n').
I've re-done the numbers with fixed period, as suggested, and the difference between v3 and v4+ is in the sampling noise, differing about 0.3%.
r~
