From: jamal <[EMAIL PROTECTED]> Date: Wed, 06 Jun 2007 19:35:46 -0400
> There is no potential for parallelizing on transmit that i can think of. > Dave, please explain it slowly so i can understand it. > > There is huge potential for parallelizing on receive. But i am certainly > missing the value in the transmit. I gave an example in another response, you have N processes queueing up data for TCP or UDP or whatever in parallel on different cpus, all going out the same 10gbit device. All of them enter into ->hard_start_xmit(), and thus all of them try to take the same netdev->tx_lock If they have multiple TX queues, independantly programmable, that single lock is stupid. We could use per-queue TX locks for such hardware, but we can't support that currently. - 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
