Messages in this thread | | | Date | Wed, 3 Oct 2001 20:46:45 -0400 (EDT) | From | jamal <> | Subject | Re: [announce] [patch] limiting IRQ load, irq-rewrite-2.4.11-B5 |
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On Wed, 3 Oct 2001, Ingo Molnar wrote:
> > On Wed, 3 Oct 2001, jamal wrote: > > (and the only thing i pointed out was that the patch as-is did not limit > the amount of polling done.)
you mean in the softirq or the one line in the driver?
> > > > *if* you can make polling a success in ~90% of the time we enter > > > tulip_poll() under non-specific server load (ie. not routing), then i > > > think you have really good metrics. > > > > we can make it 100% successful; i mentioned that we only do work, if > > there is work to be done. > > can you really make it 100% successful for rx? Ie. do you only ever call > the ->poll() function if there is a new packet waiting? How do you know > with a 100% probability that someone on the network just sent a new packet > waiting? (without receiving an interrupt to begin with that is.) >
Take a look at what i think is the NAPI state machine pending a nod from Alexey and Robert: http://www.cyberus.ca/~hadi/NAPI-SM.ps.gz
cheers, jamal
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