> :> FWIW, I'm seeing this as well. However, this appears to be a new > :> occurance, as we were using a FreeBSD 3.X system for our reference test > :> platform. > : > :Someone recently submitted a PR about TCP based NFS being significantly > :slower under 4.X. I wonder if it could be related? > : > : http://www.freebsd.org/cgi/query-pr.cgi?pr=misc/32141 > : > :There is quite a lot of detail in the PR and the submitter has no > :trouble reproducing the problem. > : > : David. > > Hmm. I'll play with it a bit tomorrow. Er, later today. One thing > I noticed recently with NFS/TCP is that I have to run 'nfsiod -n 4' > on the client to get reasonable TCP performance. I don't think I > had to do that before. It sure sounds similar... like a delayed-ack > problem or improper transmit side backoff. > > It would be nice if someone able to reproduce the problem can test > the TCP connection with newreno turned off (net.inet.tcp.newreno) > and delayed acks turned off (net.inet.tcp.delayed_ack). If that > fixes the proble it narrows down our search considerably.
John Capo replied that turning off both did not help his setup any. I was supposed to be testing things yesterday, but the guys got pulled away on another project. Perhaps today I'll get a chance to get some tcpdump's and some more test data. Nate To Unsubscribe: send mail to [EMAIL PROTECTED] with "unsubscribe freebsd-hackers" in the body of the message
