On Mon, Feb 22, 2021 at 04:28:30PM +0100, Jonathan Schwender wrote: > > Hi John, > > This patch adds the option --mainaffinity to specify the affinity of > the main pid. > This is mainly useful if you want to bind the main thread to a > different (e.g. housekeeping ) CPU than the measurement threads. > Pardon my ignorance; can you please specify why is this important? The measurement threads have an RT priority while the main thread is SCHED_OTHER. So why would the cyclictest measurements really be affected by the main thread (unless there's a preempt_rt bug)? Do you also have any numbers showing different results with/without "--mainaffinity"? Thanks, -- Ahmed S. Darwish
