On Tue, Oct 02, 2007 at 02:16:56PM -0700, David Miller wrote: > We absolutely depend upon people like you to report when there are > anomalies like this. It's the only thing that scales.
Well cool, finally doing something useful :) Is this issue no test setup? Because this does seem like something we'd want to have work well. > FWIW I have a t1000 Niagara box and an Ultra45 going through a netgear > gigabit switch. I'm getting 85MB/sec in one direction and 10MB/sec in > the other (using bw_tcp from lmbench3). Note that bw_tcp mucks with SND/RCVBUF. It probably shouldn't, it's been 12 years since that code went in there and I dunno if it is still needed. > Both are using identical > broadcom tigon3 gigabit chips and identical current kernels so that is > a truly strange result. > > I'll investigate, it may be the same thing you're seeing. Wow, sounds very similar. In my case I was seeing pretty close to 3x consistently. You're more like 8x, but I was all e1000 not broadcom. And note that sky2 doesn't have this problem. Does the broadcom do TSO? And sky2 not? I noticed a much higher CPU load for sky2. -- --- Larry McVoy lm at bitmover.com http://www.bitkeeper.com - 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
