On Saturday, 22. April 2006 15:49, Jörn Engel wrote: > That was another main point, yes. And the endpoints should be as > little burden on the bottlenecks as possible. One bottleneck is the > receive interrupt, which shouldn't wait for cachelines from other cpus > too much.
Thats right. This will be made a non issue with early demuxing on the NIC and MSI (or was it MSI-X?) which will select the right CPU based on hardware channels. In the meantime I would reduce the effects with only committing on full buffer or on leaving the interrupt handler. This would be ok, because here you have to wakeup the process anyway on full buffer and if it slept because of empty buffer. You loose only, if your application didn't sleep yet and you need to leave the interrupt handler because there is no work anymore. In this case the atomic_add would be significant. All this is quite similiar to now we do page_vec stuff in mm/ already. Regards Ingo Oeser - To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html
