Factors: enabling TCP chimney and RSS.
*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 11:41 AM, Adam Lawson <alaw...@aqorn.com> wrote: > Try this Cisco white paper. *10Ge Connectivity with Windows Servers* > > > http://www.cisco.com/c/dam/en/us/products/collateral/switches/nexus-7000-series-switches/C07-572828-00_10Gb_Conn_Win_DG.pdf > > See page 14. > > > *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 11:09 AM, JR <botem...@gmail.com> wrote: > >> 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
