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 <[email protected]
<mailto:[email protected]>> 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
<[email protected] <mailto:[email protected]>
<mailto:[email protected] <mailto:[email protected]>>> 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
<[email protected] <mailto:[email protected]>
<mailto:[email protected] <mailto:[email protected]>>>
> 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@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@lists.__openstack.org
<mailto:[email protected]>
<mailto:OpenStack-operators@__lists.openstack.org
<mailto:[email protected]>>
> > >
http://lists.openstack.org/__cgi-bin/mailman/listinfo/__openstack-operators
<http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-operators>
> >
> >
--
Pozdrawiam
Sławek Kapłonski
[email protected] <mailto:[email protected]>
--
Pozdrawiam
Sławek Kapłonski
[email protected]
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