Re: [Fwd: asymetric speeds over gigE link]

2007-05-31 Thread Andrew Gallatin
security writes: > The down side is that the best speed I got was around 362Mbps on a > gigE link (with netpipe). I had hoped for better. 362Mb/s is way too low for 1GbE. You might want to try a UDP test to isolate the bottleneck somewhat. Try netperf -tUDP_STREAM -Hmacpro02-m -- -m 1472

Re: [Fwd: asymetric speeds over gigE link]

2007-05-30 Thread George V. Neville-Neil
At Wed, 30 May 2007 13:49:43 -0700, security wrote: > Drew, > Odd you should mention netperf. It yielded nearly identical > asymmetric results as iperf. I ended up testing with netpipe (NPtcp). > It reported fairly symmetric speeds between the two boxes when the send > and recv buffers were s

Re: [Fwd: asymetric speeds over gigE link]

2007-05-30 Thread security
> security writes: > > Sent this to -net and didn't get much info, so I'll try here since > > there's some overlap > > > > Summary: Using iperf to measure TCP net speed between a linux (kubuntu > edgy) and > > Iperf is probably your problem, it tends to perform really poorly on > nearly any

Re: [Fwd: asymetric speeds over gigE link]

2007-05-30 Thread Andrew Gallatin
security writes: > Sent this to -net and didn't get much info, so I'll try here since > there's some overlap > > Summary: Using iperf to measure TCP net speed between a linux (kubuntu > edgy) and Iperf is probably your problem, it tends to perform really poorly on nearly any OS other than

Re: asymetric speeds over gigE link]

2007-05-21 Thread security
Thanks Steve. Just tried it and no change. I also rebuilt my kernel for polling and set it on the em0 device. While it did lower interrupt time, it didn't make any real change in my numbers jim Steven Hartland wrote: > You might want to try setting: > net.inet.tcp.inflight.enable=0 > > Just c

Re: asymetric speeds over gigE link]

2007-05-21 Thread Steven Hartland
You might want to try setting: net.inet.tcp.inflight.enable=0 Just changing this on our FreeBSD 6.2 boxes enabled them to achieve full line rate with ftp / proftpd transfers. Steve - Original Message - From: "security" <[EMAIL PROTECTED]> Switch is the Netgear GS105 (5 port, supp

[Fwd: asymetric speeds over gigE link]

2007-05-21 Thread security
Sent this to -net and didn't get much info, so I'll try here since there's some overlap Summary: Using iperf to measure TCP net speed between a linux (kubuntu edgy) and freebsd box over gigE, I see significant speed difference depending on the data direction. Pushing data from the freebsd box t