Re: [PATCH 1/6] x86/intel_rdt/mba_sc: Add documentation for MBA software controller

[Thomas Gleixner]

On Tue, 3 Apr 2018, Shivappa Vikas wrote:
> On Tue, 3 Apr 2018, Thomas Gleixner wrote:
> >  The proposed new interface has no upper limit. The existing percentage
> >  based implementation has at least some notion of limit and scale; not
> >  really helpful either because of the hardware implementation. but I
> > 
> >  How is the poor admin supposed to configure that new thing without
> >  knowing what the actual hardware limits are in the first place?
> 
> That is true. The default values only put it to a very high bandwidth which
> means user gets to use everything. There seems no other way other than
> caliberating to know the actual max bandwidth in bytes. That could be a better
> value to have as default so admin knows the limit. I will explore if there is
> a way to calculate the same without caliberating.

Right, ideally we get that information from the hardware.

Thanks,

	tglx