>-----Original Message----- >From: [email protected] [mailto:vbox-dev- >[email protected]] On Behalf Of Aleksey Ilyushin >Sent: Friday, June 24, 2011 9:22 AM >To: [email protected] >Subject: Re: [vbox-dev] bridged network between VMs on same host is very slow > >>>> Data transfer between VMs on the same host is very, very slow ~16KB/s. >> I am finding slowness with Windows guest to Linux Host and also >> general slowness on network access from client pc to any guest. >> >There is a performance issue with Windows guests since they tend to use smaller >packets with segmentation offloading. They will always be slower than Linux >guests but we are working on narrowing the gap. >> Speeds were terrible using a Realtek PCI card 8169, something like >> 4.25mbts but perhaps a hardware incompatibility. >What are the offloading settings for the card (sudo ethtool -k <interface>)? >> >
The part I find confusing is the network speeds to other resources (besides to VMs located on the same host) is fine, if it was a Windows guest issue, wouldn't it affect all traffic? These are Intel(R) PRO/1000 Network cards on a server class motherboard. Offload parameters for eth0: rx-checksumming: on tx-checksumming: on scatter-gather: on tcp-segmentation-offload: on udp-fragmentation-offload: off generic-segmentation-offload: on generic-receive-offload: off large-receive-offload: off thanks, Geoff _______________________________________________ vbox-dev mailing list [email protected] http://vbox.innotek.de/mailman/listinfo/vbox-dev
