Re: e1000 full-duplex TCP performance well below wire speed

2008-02-01 Thread Carsten Aulbert
Hi all Rick Jones wrote: 2) use the aforementioned burst TCP_RR test. This is then a single netperf with data flowing both ways on a single connection so no issue of skew, but perhaps an issue of being one connection and so one process on each end. Since our major gaol is to establish a

Re: e1000 full-duplex TCP performance well below wire speed

2008-01-31 Thread Carsten Aulbert
Good morning (my TZ), I'll try to answer all questions, hoewver if I miss something big, please point my nose to it again. Rick Jones wrote: As asked in LKML thread, please post the exact netperf command used to start the client/server, whether or not you're using irqbalanced (aka

Re: e1000 full-duplex TCP performance well below wire speed

2008-01-31 Thread Carsten Aulbert
Hi all, slowly crawling through the mails. Brandeburg, Jesse wrote: The test was done with various mtu sizes ranging from 1500 to 9000, with ethernet flow control switched on and off, and using reno and cubic as a TCP congestion control. As asked in LKML thread, please post the exact netperf

Re: e1000 full-duplex TCP performance well below wire speed

2008-01-31 Thread Carsten Aulbert
Brief question I forgot to ask: Right now we are using the old version 7.3.20-k2. To save some effort on your end, shall we upgrade this to 7.6.15 or should our version be good enough? Thanks Carsten -- To unsubscribe from this list: send the line unsubscribe netdev in the body of a message

Re: e1000 full-duplex TCP performance well below wire speed

2008-01-31 Thread Carsten Aulbert
Hi Andi, Andi Kleen wrote: Another issue with full duplex TCP not mentioned yet is that if TSO is used the output will be somewhat bursty and might cause problems with the TCP ACK clock of the other direction because the ACKs would need to squeeze in between full TSO bursts. You could try

Re: e1000 full-duplex TCP performance well below wire speed

2008-01-31 Thread Carsten Aulbert
Hi all, Brandeburg, Jesse wrote: I would suggest you try TCP_RR with a command line something like this: netperf -t TCP_RR -H hostname -C -c -- -b 4 -r 64K I did that and the results can be found here: https://n0.aei.uni-hannover.de/wiki/index.php/NetworkTest seems something went wrong and