[openib-general] Re: [PATCH 07/16] ehca: interrupt handling routines

Michael S. Tsirkin mst at mellanox.co.il
Tue May 9 22:33:41 PDT 2006


Quoting r. Shirley Ma <xma at us.ibm.com>:
> Subject: Re: [openib-general] Re: [PATCH 07/16] ehca: interrupt handling?routines
> 
> 
> "Michael S. Tsirkin" <mst at mellanox.co.il> wrote on 05/09/2006 01:20:41 PM:
> 
> > Quoting r. Shirley Ma <xma at us.ibm.com>:
> > > My understanding is NAPI handle interrutps CQ callbacks on the same CPU.
> >
> > My understanding is NAPI disables interrupts under high RX load. No?
> 
> Yes, NAPI disables the interrupts based on the weight. In IPoIB case, it doesn't
> send out the next completion notification under heavy loading.
> The similiar CQ polling is still in NAPI on same CPU, but it's not a callback
> anymore.

Sorry, same CPU as what?

-- 
MST



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