Sebastian Andrzej Siewior <bigeasy@xxxxxxxxxxxxx> writes: > On 2021-09-30 09:13:25 [+0900], Punit Agrawal wrote: >> With hackbench, the system is sufficiently busy to avoid the going into >> idle. > > Not just that. cyclictest's usage of /dev/cpu_dma_latency has the side > effect that it may disable some of the PM stuff in the system. > So your system appears good but then when cyclictest is gone, the > numbers go up. > > Maybe we should drop that so we observe a system without altering its > behaviour? +1 For users tuning their system it doesn't help if the reported numbers are not reproducible when running their application.
