On Thu, 30 Sep 2021, John Ogness wrote: > On 2021-09-30, Sebastian Andrzej Siewior <bigeasy@xxxxxxxxxxxxx> 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 > > Developers wanting to explicitly cause this behavior can use --latency= > to enable it. Having it on as a default is misleading. Where does this "--latency=" option apply to? John
