Re: [PATCH] sched: print information about scheduler granularity

[Jürgen Groß <jgross@xxxxxxxx>]

On 16.04.20 11:20, Sergey Dyasli wrote:
> On 16/04/2020 09:57, Jürgen Groß wrote:
> > On 16.04.20 10:33, Sergey Dyasli wrote:
> > > Currently it might be not obvious which scheduling mode is being used
> > > by the scheduler. Alleviate this by printing additional information
> > > about the selected granularity. Messages now look like these:
> > >
> > > 1. boot
> > > (XEN) [00089808f0ea7496] Using scheduler: SMP Credit Scheduler (credit) in 
> > > core-scheduling mode
> > >
> > > 2. xl debug-keys r
> > > (XEN) [   45.914314] Scheduler: SMP Credit Scheduler (credit) in 2-way 
> > > core-scheduling mode
> > >
> > > Signed-off-by: Sergey Dyasli <sergey.dyasli@xxxxxxxxxx>
> > Hmm, do we need that?
> >
> > The xen commandline ins part of the boot messages and is contained
> > in the "xl info" output.
> It's true that you can see "sched-gran=core" in "xl info" output. But that's
> just the switch - not the end result. A user might want to verify that he did
> everything correctly and core-scheduling mode has indeed been enabled.
I'm planning to add this information in the pending hypfs (per cpupool).

I'm not opposed to your patch, but as soon as we have per-cpupool
granularity it should be reverted again.


Juergen