Messages in this thread | | | Date | Fri, 20 Nov 2015 08:53:34 +0100 (CET) | From | Thomas Gleixner <> | Subject | Re: [RFD] CAT user space interface revisited |
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On Thu, 19 Nov 2015, Marcelo Tosatti wrote: > On Thu, Nov 19, 2015 at 10:09:03AM +0100, Thomas Gleixner wrote: > > On Wed, 18 Nov 2015, Marcelo Tosatti wrote > > > Actually, there is a point that is useful: you might want the important > > > application to share the L3 portion with HW (that HW DMAs into), and > > > have only the application and the HW use that region. > > > > > > So its a good point that controlling the exact position of the reservation > > > is important. > > > > I'm glad you figured that out yourself. :) > > > > Thanks, > > > > tglx > > The HW is a reclaimer of the L3 region shared with HW. > > You might want to remove any threads from reclaiming from > that region.
I might for some threads, but certainly not for those which need to access DMA buffers. Throwing away 10% of L3 just because you don't want to deal with it at the interface level is hillarious.
Thanks,
tglx
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