On Wed, Sep 30, 2015 at 11:00:49PM +0300, Gleb Natapov wrote: > > You are increasing interrupt latency by a huge factor by channeling > > interrupts through a scheduler. Let user install an > > interrupt handler function, and be done with it. > > > Interrupt latency is not always hugely important. If you enter interrupt > mode only when idle hundred more us on a first packet will not kill you.
It certainly affects worst-case latency. And if you lower interupt latency, you can go idle faster, so it affects power too. > If > interrupt latency is important then uio may be not the right solution, > but then neither is vfio. That's what I'm saying, if you don't need memory isolation you can do better than just slightly tweak existing drivers. > -- > Gleb.
