Re: RT scheduler config, suggestions and questions

2008-02-06 Thread Peter Zijlstra
On Wed, 2008-02-06 at 10:04 -0800, Max Krasnyanskiy wrote: > Peter Zijlstra wrote: > > On Wed, 2008-02-06 at 07:36 +0100, Peter Zijlstra wrote: > > > >>> btw I can see "watchdog" being very useful to catch hard-RT tasks that > >>> exceed the deadline. > >>> But's it gotta be per thread. > >> It

Re: RT scheduler config, suggestions and questions

2008-02-06 Thread Max Krasnyanskiy
Peter Zijlstra wrote: On Wed, 2008-02-06 at 07:36 +0100, Peter Zijlstra wrote: btw I can see "watchdog" being very useful to catch hard-RT tasks that exceed the deadline. But's it gotta be per thread. It is. Single setting per user is not enough. Unless a use has a single RT task. ? Ah,

Re: RT scheduler config, suggestions and questions

2008-02-06 Thread Max Krasnyanskiy
Peter Zijlstra wrote: On Tue, 2008-02-05 at 15:37 -0800, Max Krasnyanskiy wrote: Folks, I just realized that in latest Linus' tree following sysctls are under SCHED_DEBUG: sched_rt_period sched_rt_ratio I do not believe that is correct. I know that we do not want to expose sc

Re: RT scheduler config, suggestions and questions

2008-02-06 Thread Peter Zijlstra
On Wed, 2008-02-06 at 07:36 +0100, Peter Zijlstra wrote: > > btw I can see "watchdog" being very useful to catch hard-RT tasks that > > exceed the deadline. > > But's it gotta be per thread. > > It is. > > > Single setting per user is not enough. Unless a use has a single RT task. > > ? Ah,

Re: RT scheduler config, suggestions and questions

2008-02-05 Thread Peter Zijlstra
On Tue, 2008-02-05 at 15:37 -0800, Max Krasnyanskiy wrote: > Folks, > > I just realized that in latest Linus' tree following sysctls are under > SCHED_DEBUG: > sched_rt_period > sched_rt_ratio > > I do not believe that is correct. I know that we do not want to expose > scheduler kn