On 11 April 2018 at 18:15, Peter Zijlstra <pet...@infradead.org> wrote: > On Wed, Apr 11, 2018 at 06:10:47PM +0200, Vincent Guittot wrote: >> > Could is be that for some reason the nohz balancer now takes a very long >> > time to run? >> >> Heiner mentions that is was a relatively slow celeron and he uses >> ondemand governor. So I was about to ask him to use performance >> governor to see if it can be because cpu runs slow and takes too muche >> time to enter idle > > Maybe also hand him a patch with some trace_printk()s in and ask him to > send /debug/tracing/trace after it happens or somesuch. Maybe we can > find a clue that way.
yes
