[Openstack-operators] improve perfomance Neutron VXLAN
Pedro Sousa
pgsousa at gmail.com
Fri Jan 23 11:07:57 UTC 2015
Hi Slawek,
I've tried with 8950/9000 but I had problems communicating with external
hosts from the VM.
Regards,
Pedro Sousa
On Thu, Jan 22, 2015 at 9:36 PM, Sławek Kapłoński <slawek at kaplonski.pl>
wrote:
> As I wrote earlier, for me it is best to have 9000 on hosts and 8950 on
> instances. Then I have full speed between instances. With lower mtu on
> instances I have about 2-2.5 Gbps and I saw that vhost-net process on host
> is using 100 of 1 cpu core. I'm using libvirt with kvm - maybe You are
> using something else and it will be different on Your hosts.
>
> Slawek Kaplonski
>
>
> W dniu 22.01.2015 o 20:45, Pedro Sousa pisze:
>
>> Hi Slawek,
>>
>> I've tried several options but that one that seems to work better is MTU
>> 1450 on VM and MTU 1600 on the host. With MTU 1400 on the VM I would get
>> freezes and timeouts.
>>
>> Still I get about 2.2Gbit/Sec while in the host I get 9 Gbit/Sec, do you
>> think is normal?
>>
>> Thanks,
>> Pedro Sousa
>>
>>
>>
>>
>> On Thu, Jan 22, 2015 at 7:32 PM, Sławek Kapłoński <slawek at kaplonski.pl
>> <mailto:slawek at kaplonski.pl>> wrote:
>>
>> Hello,
>>
>> In dnsmasq file in neutron will be ok. It will then force option 26
>> on vm.
>> You can also manually change it on vms to tests.
>>
>> Slawek Kaplonski
>>
>> W dniu 22.01.2015 o 17:06, Pedro Sousa pisze:
>>
>> Hi Slawek,
>>
>> I'll test this, did you change the mtu on dnsmasq file in
>> /etc/neutron/?
>> Or do you need to change on other places too?
>>
>> Thanks,
>> Pedro Sousa
>>
>> On Wed, Jan 21, 2015 at 4:26 PM, Sławek Kapłoński
>> <slawek at kaplonski.pl <mailto:slawek at kaplonski.pl>
>> <mailto:slawek at kaplonski.pl <mailto:slawek at kaplonski.pl>>> wrote:
>>
>> I have similar and I also got something like 2-2,5Gbps
>> between vms.
>> When I
>> change it to 8950 on vms (so in neutron conf) (50 less then
>> on
>> hosts) then it
>> is much better.
>> You can check that probably when You make test between vms
>> on host
>> there is
>> process called "vhost-net" (or something like that) and it
>> uses 100%
>> of one cpu
>> core and that is imho bottleneck
>>
>> Slawek Kaplonski
>>
>> On Wed, Jan 21, 2015 at 04:12:02PM +0000, Pedro Sousa wrote:
>> > Hi Slawek,
>> >
>> > I have dhcp-option-force=26,1400 in neutron-dnsmasq.conf
>> and
>> MTU=9000 on
>> > network-interfaces in the operating system.
>> >
>> > Do I need to change somewhere else?
>> >
>> > Thanks,
>> > Pedro Sousa
>> >
>> > On Wed, Jan 21, 2015 at 4:07 PM, Sławek Kapłoński
>> <slawek at kaplonski.pl <mailto:slawek at kaplonski.pl>
>> <mailto:slawek at kaplonski.pl <mailto:slawek at kaplonski.pl>>>
>>
>> > wrote:
>> >
>> > > Hello,
>> > >
>> > > Try to set bigger jumbo framse on hosts and vms. For
>> example on
>> hosts You
>> > > can
>> > > set 9000 and then 8950 and check then. It helps me
>> with similar
>> problem.
>> > >
>> > > Slawek Kaplonski
>> > >
>> > > On Wed, Jan 21, 2015 at 03:22:50PM +0000, Pedro Sousa
>> wrote:
>> > > > Hi all,
>> > > >
>> > > > is there a way to improve network performance on my
>> instances
>> with
>> > > VXLAN? I
>> > > > changed the MTU on physical interfaces to 1600, still
>> performance it's
>> > > > lower than in baremetal hosts:
>> > > >
>> > > > *On Instance:*
>> > > >
>> > > > [root at vms6-149a71e8-1f2a-4d6e-__bba4-e70dfa42b289
>> ~]# iperf3 -s
>> > > >
>> ------------------------------__-----------------------------
>> > > > Server listening on 5201
>> > > >
>> ------------------------------__-----------------------------
>>
>> > > > Accepted connection from 10.0.66.35, port 42900
>> > > > [ 5] local 10.0.66.38 port 5201 connected to
>> 10.0.66.35 port
>> 42901
>> > > > [ ID] Interval Transfer Bandwidth
>> > > > [ 5] 0.00-1.00 sec 189 MBytes 1.59 Gbits/sec
>> > > > [ 5] 1.00-2.00 sec 245 MBytes 2.06 Gbits/sec
>> > > > [ 5] 2.00-3.00 sec 213 MBytes 1.78 Gbits/sec
>> > > > [ 5] 3.00-4.00 sec 227 MBytes 1.91 Gbits/sec
>> > > > [ 5] 4.00-5.00 sec 235 MBytes 1.97 Gbits/sec
>> > > > [ 5] 5.00-6.00 sec 235 MBytes 1.97 Gbits/sec
>> > > > [ 5] 6.00-7.00 sec 234 MBytes 1.96 Gbits/sec
>> > > > [ 5] 7.00-8.00 sec 235 MBytes 1.97 Gbits/sec
>> > > > [ 5] 8.00-9.00 sec 244 MBytes 2.05 Gbits/sec
>> > > > [ 5] 9.00-10.00 sec 234 MBytes 1.97 Gbits/sec
>> > > > [ 5] 10.00-10.04 sec 9.30 MBytes 1.97 Gbits/sec
>> > > > - - - - - - - - - - - - - - - - - - - - - - - - -
>> > > > [ ID] Interval Transfer Bandwidth
>> Retr
>> > > > [ 5] 0.00-10.04 sec 2.25 GBytes 1.92
>> Gbits/sec 43
>> > > sender
>> > > > [ 5] 0.00-10.04 sec 2.25 GBytes 1.92 Gbits/sec
>> > > > receiver
>> > > >
>> > > >
>> > > > *On baremetal:*
>> > > > iperf3 -s
>> > > > warning: this system does not seem to support IPv6 -
>> trying IPv4
>> > > >
>> ------------------------------__-----------------------------
>> > > > Server listening on 5201
>> > > >
>> ------------------------------__-----------------------------
>>
>> > > > Accepted connection from 172.16.21.4, port 51408
>> > > > [ 5] local 172.16.21.5 port 5201 connected to
>> 172.16.21.4
>> port 51409
>> > > > [ ID] Interval Transfer Bandwidth
>> > > > [ 5] 0.00-1.00 sec 1.02 GBytes 8.76 Gbits/sec
>> > > > [ 5] 1.00-2.00 sec 1.07 GBytes 9.23 Gbits/sec
>> > > > [ 5] 2.00-3.00 sec 1.08 GBytes 9.29 Gbits/sec
>> > > > [ 5] 3.00-4.00 sec 1.08 GBytes 9.27 Gbits/sec
>> > > > [ 5] 4.00-5.00 sec 1.08 GBytes 9.27 Gbits/sec
>> > > > [ 5] 5.00-6.00 sec 1.08 GBytes 9.28 Gbits/sec
>> > > > [ 5] 6.00-7.00 sec 1.08 GBytes 9.28 Gbits/sec
>> > > > [ 5] 7.00-8.00 sec 1.08 GBytes 9.29 Gbits/sec
>> > > > [ 5] 8.00-9.00 sec 1.08 GBytes 9.28 Gbits/sec
>> > > > [ 5] 9.00-10.00 sec 1.08 GBytes 9.29 Gbits/sec
>> > > > [ 5] 10.00-10.04 sec 42.8 MBytes 9.31 Gbits/sec
>> > > > - - - - - - - - - - - - - - - - - - - - - - - - -
>> > > > [ ID] Interval Transfer Bandwidth
>> Retr
>> > > > [ 5] 0.00-10.04 sec 10.8 GBytes 9.23
>> Gbits/sec 95
>> > > sender
>> > > > [ 5] 0.00-10.04 sec 10.8 GBytes 9.22 Gbits/sec
>> > > > receiver
>> > > >
>> > > >
>> > > > Thanks,
>> > > > Pedro Sousa
>> > >
>> > > > _________________________________________________
>> > > > OpenStack-operators mailing list
>> > > > OpenStack-operators at lists.__openstack.org
>> <mailto:OpenStack-operators at lists.openstack.org>
>> <mailto:OpenStack-operators at __lists.openstack.org
>> <mailto:OpenStack-operators at lists.openstack.org>>
>> > > >
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>> > >
>> > >
>>
>>
>>
>> --
>> Pozdrawiam
>> Sławek Kapłonski
>> slawek at kaplonski.pl <mailto:slawek at kaplonski.pl>
>>
>>
>>
> --
> Pozdrawiam
> Sławek Kapłonski
> slawek at kaplonski.pl
>
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