[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] RE: [Xen-users] Another GPLPV pre-release 0.9.11-pre20
"James Harper" <james.harper@xxxxxxxxxxxxxxxx> wrote on 05.11.2008 11:49:18: > Based on that, I'll get you to try some tcpdumps with offload enabled. > If you want to do them straight away, we are looking for: > > Dom0<->WinDomU - incorrect checksums > Bacula<->WinDomU - outgoing packets from each machine have bad checksum, > incoming packets have good checksum > > In Dom0 I really need to see tcpdump's of the vif interface, the bridge > interface, and the peth0.13 interface. I tcpdumped my remote desktop connection (checksum offload enabled, large send offload enabled): Showed incorrect cksums on vif65.0 and br13 interfaces, but no incorrect cksums on peth0.13 i quess you are right, Linux does calculate correct tcp chsums when it send them off to the wire...? Also when i did iperf between dom0 <-> winDomU with large send offload enabled and checksum offload enabled i get this: C:\TEMP>iperf -s -w1M ------------------------------------------------------------ Server listening on TCP port 5001 TCP window size: 1.00 MByte ------------------------------------------------------------ [1872] local 213.250.XX.XX port 5001 connected with 213.250.DOM.0 port 43323 [ ID] Interval Transfer Bandwidth [1872] 0.0-10.0 sec 1.06 GBytes 912 Mbits/sec I retested that couple times and allways about 910-920 Mbit/sec, so when i enable checksum offload it goes from 1.59 Gbits/sec -> 912Mbit. Phone: GSM: +358 50 384 3232 Net Servant Service desk: 010 470 7900 _______________________________________________ Xen-users mailing list Xen-users@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-users
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