Hi,
I’m reporting a performance regression of up to 6% sequential I/O vdbench regression observed on 6.12.y kernel. While running performance benchmarks on v6.12.60 kernel the sequential I/O vdbench metrics are showing a 5-6% performance regression when compared to v6.12.48
Bisect root cause commit ======================== - commit b39b62075ab4 ("cpuidle: menu: Remove iowait influence")
Things work fine again when the previously removed performance-multiplier code is added back.
Test details ============ The system is connected to a number of disks in disk array using multipathing and directio configuration in the vdbench profile.
wd=wd1,sd=sd*,rdpct=0,seekpct=sequential,xfersize=128k rd=128k64T,wd=wd1,iorate=max,elapsed=600,interval=1,warmup=300,threads=64
Thanks, Alok