Darn. That dropped the performance by ~50% ...
On 5/9/2014 1:57 PM, Adam Lawson wrote: > I just heard back. Within Windows, disable Large File Offload. > > Let me know how that goes? > > 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 10:54 AM, JR <botem...@gmail.com> wrote: > >> Adam, >> >> If I'm looking in the right place (the redhat virtio ethernet adapter >> properties), there is nowhere to specify forcing the speed or duplex. >> The only value I see is Init.ConnectionRate (which is 10G). I've been >> able to see performance in excess of 2Gb/sec (when running an iperf >> against the ubuntu host on which the VM runs) so it doesn't think it's a >> 1G NIC; the performance is just very poor. The same iperf from a centos >> VM to its host gives > 9Gb/sec. >> >> Thanks >> JR >> >> On 5/9/2014 1:19 PM, Adam Lawson wrote: >>> 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> >>>> >>> >> >> -- >> 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> >> > -- 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> _______________________________________________ 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