Was that the VM or the hypervisor ? These tips are good to include the upcoming hypervisor tuning guide (https://wiki.openstack.org/wiki/Documentation/HypervisorTuningGuide)
Tim > -----Original Message----- > From: Satish Patel [mailto:satish....@gmail.com] > Sent: 17 December 2015 18:55 > To: Vahric Muhtaryan <vah...@doruk.net.tr> > Cc: openstack@lists.openstack.org > Subject: Re: [Openstack] Poor instance network performance > > I think i found solution, it improve little bit performance > > on tapdd55b834-f8 interface default txqueuelen size was 500, I have > changed it to 10000 > > On Thu, Dec 17, 2015 at 12:07 PM, Satish Patel <satish....@gmail.com> > wrote: > > On host (compute) machine tap device showing lots of TX packet loss. > > > > tapdd55b834-f8: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu > 1500 > > inet6 fe80::fc16:3eff:fecd:2aa4 prefixlen 64 scopeid 0x20<link> > > ether fe:16:3e:cd:2a:a4 txqueuelen 500 (Ethernet) > > RX packets 1060731031 bytes 298573599135 (278.0 GiB) > > RX errors 0 dropped 0 overruns 0 frame 0 > > TX packets 503372157 bytes 81345389820 (75.7 GiB) > > TX errors 0 dropped 171333348 overruns 0 carrier 0 > > collisions 0 > > > > On Thu, Dec 17, 2015 at 11:45 AM, Satish Patel <satish....@gmail.com> > wrote: > >> I just ran iperf and here is the results, bi-directional > >> > >> [ ID] Interval Transfer Bandwidth > >> [ 5] 0.0-10.0 sec 1.04 GBytes 895 Mbits/sec > >> [ 4] 0.0-10.0 sec 1.09 GBytes 935 Mbits/sec > >> > >> Look like when guest is under load, it can't handle traffic and start > >> dropping packets. > >> > >> > >> > >> On Thu, Dec 17, 2015 at 11:36 AM, Vahric Muhtaryan > <vah...@doruk.net.tr> wrote: > >>> Maybe this also could be reference > >>> > >>> http://42.62.73.30/wordpress/wp-content/uploads/2013/10/Neutron- > perf > >>> ormance > >>> -testing.pdf > >>> > >>> > >>> On 17/12/15 18:32, "Satish Patel" <satish....@gmail.com> wrote: > >>> > >>>>We have our own custom application running on guest VM. i am just > >>>>checking performance of VM. but i found if load go little up machine > >>>>start breaking ping. > >>>> > >>>>I didn't run iperf test yet. which i am going to run in a min. > >>>> > >>>>On Thu, Dec 17, 2015 at 11:28 AM, Vahric Muhtaryan > >>>><vah...@doruk.net.tr> > >>>>wrote: > >>>>> Okay Satish , > >>>>> > >>>>> Im not expert and do not want to divert you wrong direction. > >>>>> I want to make your test on my server to cross check , can you pls > >>>>>explain how and with what tool and to where you are making this > >>>>>test. > >>>>> > >>>>> Regards > >>>>> VM > >>>>> > >>>>> On 17/12/15 18:11, "Satish Patel" <satish....@gmail.com> wrote: > >>>>> > >>>>>>Thanks for reply, > >>>>>> > >>>>>>Following is my guest xml file. > >>>>>> > >>>>>>I am using Openstack JUNO and it use OVS. > >>>>>> > >>>>>><interface type='bridge'> > >>>>>> <mac address='fa:16:3e:cd:2a:a4'/> > >>>>>> <source bridge='qbrdd55b834-f8'/> > >>>>>> <target dev='tapdd55b834-f8'/> > >>>>>> <model type='virtio'/> > >>>>>> <alias name='net0'/> > >>>>>> <address type='pci' domain='0x0000' bus='0x00' slot='0x03' > >>>>>>function='0x0'/> > >>>>>> </interface> > >>>>>> > >>>>>> > >>>>>>Following is TOP command on guest machine, at this point i am > >>>>>>getting ping breaks > >>>>>> > >>>>>>top - 16:10:30 up 20:46, 1 user, load average: 4.63, 4.41, 3.60 > >>>>>>Tasks: 165 total, 6 running, 159 sleeping, 0 stopped, 0 zombie > >>>>>>%Cpu0 : 15.1 us, 12.3 sy, 0.0 ni, 60.9 id, 0.0 wa, 0.0 hi, > >>>>>>0.3 si, > >>>>>>11.4 st > >>>>>>%Cpu1 : 22.9 us, 17.2 sy, 0.0 ni, 51.4 id, 0.0 wa, 0.0 hi, > >>>>>>0.3 si, > >>>>>>8.2 st > >>>>>>%Cpu2 : 28.8 us, 22.4 sy, 0.0 ni, 47.5 id, 0.0 wa, 0.0 hi, > >>>>>>1.0 si, > >>>>>>0.3 st > >>>>>>%Cpu3 : 16.6 us, 15.0 sy, 0.0 ni, 66.4 id, 0.0 wa, 0.0 hi, > >>>>>>0.3 si, > >>>>>>1.7 st > >>>>>>%Cpu4 : 9.8 us, 11.8 sy, 0.0 ni, 0.0 id, 75.4 wa, 0.0 hi, > >>>>>>0.3 si, > >>>>>>2.6 st > >>>>>>%Cpu5 : 7.6 us, 6.1 sy, 0.0 ni, 81.4 id, 0.0 wa, 0.0 hi, > >>>>>>4.2 si, > >>>>>>0.8 st > >>>>>>%Cpu6 : 8.1 us, 7.4 sy, 0.0 ni, 83.0 id, 0.0 wa, 0.0 hi, > >>>>>>1.4 si, > >>>>>>0.0 st > >>>>>>%Cpu7 : 17.8 us, 17.8 sy, 0.0 ni, 64.1 id, 0.0 wa, 0.0 hi, > >>>>>>0.3 si, > >>>>>>0.0 st > >>>>>>KiB Mem : 8175332 total, 4630124 free, 653284 used, 2891924 > >>>>>>buff/cache > >>>>>>KiB Swap: 0 total, 0 free, 0 used. 7131540 avail > >>>>>>Mem > >>>>>> > >>>>>> > >>>>>>On Thu, Dec 17, 2015 at 11:06 AM, Vahric Muhtaryan > >>>>>><vah...@doruk.net.tr> > >>>>>>wrote: > >>>>>>> Hello , > >>>>>>> > >>>>>>> Cool ! Todays I am testing to but not such way just only KVM. > >>>>>>> > >>>>>>> Wonder 2/3 things ; > >>>>>>> > >>>>>>> 1) Are you using virtio? > >>>>>>> <model type='virtio¹/> > >>>>>>> > >>>>>>> > >>>>>>> 2) is your vm saturating %100 of cpu inside guest ? > >>>>>>> > >>>>>>> 3) Using OVS or bridge ? > >>>>>>> > >>>>>>> Regards > >>>>>>> Vahric Muhtaryan > >>>>>>> > >>>>>>> On 17/12/15 17:41, "Satish Patel" <satish....@gmail.com> wrote: > >>>>>>> > >>>>>>>>I am doing some testing on Openstack VM network performance. > >>>>>>>>following i am doing > >>>>>>>> > >>>>>>>>Comute node: 8 CPU / 32GB mem > >>>>>>>>VM instance: 8vCPU / 8GB mem > >>>>>>>> > >>>>>>>>when i am running heavy load application, immediate my ping > >>>>>>>>started breaking for VM.. but at same time if i ping Compute > >>>>>>>>Host, its working fine without any packet loss. > >>>>>>>> > >>>>>>>>I have disabled GSO/TSO setting on eth0 but still same result. > >>>>>>>>i have notice when it reach 250mbps my ping start breaking... > >>>>>>>> > >>>>>>>>_______________________________________________ > >>>>>>>>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 > >>>>>>> > >>>>>>> > >>>>> > >>>>> > >>> > >>> > > _______________________________________________ > 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
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