Is the duplex setting and speed set on each side to force 10ge (since auto-neg seems to not work in this scenario)? Still waiting to hear back on steps taken in the situation I described earlier.
Mahalo, Adam *Adam Lawson* AQORN, Inc. 427 North Tatnall Street Ste. 58461 Wilmington, Delaware 19801-2230 Toll-free: (844) 4-AQORN-NOW Direct: +1 (302) 268-6914 On Fri, May 9, 2014 at 9:25 AM, JR <botem...@gmail.com> wrote: > I'd be very appreciative to hear how you solved this Adam. ;-) > > On 5/9/2014 12:29 AM, Adam Lawson wrote: > > Look at the TCP stack within Windows and optimizations recommended by > > Microsoft. I don't think it's a KVM or openstack question to be honest. > We > > ran into similar issues on plain old Win2008 R2 servers that were running > > on bare metal. Will update again when I ping someone to find out what > > specifically it was back then. > > > > > > *Adam Lawson* > > AQORN, Inc. > > 427 North Tatnall Street > > Ste. 58461 > > Wilmington, Delaware 19801-2230 > > Toll-free: (844) 4-AQORN-NOW > > Direct: +1 (302) 268-6914 > > > > > > > > On Thu, May 8, 2014 at 6:59 PM, JR <botem...@gmail.com> wrote: > > > >> Greetings, > >> > >> My openstack grizzly cluster runs on ubuntu 12.04 servers with 10G NICs. > >> I have ubuntu, centos and windows 2008 R2 guests. I've noticed that > >> while both my linux guests can communicate at some reasonable > >> approximation of 10G wire speed (e.g., 7-9Gb/sec on iperf tests), the > >> windows guests max out at 2.5G when talking to the host on which they > >> run, down to ~1.2G to other hosts. > >> > >> I've made some modifications as per this doc: > >> > >> http://www.linux-kvm.org/page/WindowsGuestDrivers/kvmnet/registry > >> > >> and upgraded my virtio network driver, but it's not helped. I've also > >> done about an hour or two of googling which has revealed little. > >> > >> I understand that this is not an openstack issue, but, I suspect, others > >> have encountered this when bringing 2008 R2 guests into their clusters. > >> Anyone? > >> > >> Thanks much, > >> JR > >> > >> > >> > >> _______________________________________________ > >> Mailing list: > >> http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack > >> Post to : openstack@lists.openstack.org > >> Unsubscribe : > >> http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack > >> > > > > -- > Your electronic communications are being monitored; strong encryption is > an answer. My public key > <http://pgp.mit.edu:11371/pks/lookup?op=get&search=0x4F08C504BD634953> >
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