Messages in this thread | | | Date | Thu, 31 Jan 2008 12:36:27 -0500 | From | Bill Fink <> | Subject | Re: e1000 full-duplex TCP performance well below wire speed |
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Hi Bruce,
On Thu, 31 Jan 2008, Bruce Allen wrote:
> > I see similar results on my test systems > > Thanks for this report and for confirming our observations. Could you > please confirm that a single-port bidrectional UDP link runs at wire > speed? This helps to localize the problem to the TCP stack or interaction > of the TCP stack with the e1000 driver and hardware.
Yes, a single-port bidirectional UDP test gets full GigE line rate in both directions with no packet loss.
[bill@chance4 ~]$ nuttcp -f-beta -Itx -u -Ru -w2m 192.168.6.79 & nuttcp -f-beta -Irx -r -u -Ru -w2m 192.168.6.79 tx: 1187.0078 MB / 10.04 sec = 992.0550 Mbps 19 %TX 7 %RX 0 / 151937 drop/pkt 0.00 %loss rx: 1187.1016 MB / 10.03 sec = 992.3408 Mbps 19 %TX 7 %RX 0 / 151949 drop/pkt 0.00 %loss
-Bill
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