I believe that they are already disabled.
Here is the ethtool output:
# ethtool --show-offload eth1
Features for eth1:
rx-checksumming: on
tx-checksumming: on
tx-checksum-ipv4: off
tx-checksum-unneeded: off
tx-checksum-ip-generic: on
tx-checksum-ipv6: off
tx-checksum-fcoe-crc: off [fixed]
tx-checksum-sctp: off [fixed]
scatter-gather: on
tx-scatter-gather: on
tx-scatter-gather-fraglist: off [fixed]
tcp-segmentation-offload: on
tx-tcp-segmentation: on
tx-tcp-ecn-segmentation: off
tx-tcp6-segmentation: on
udp-fragmentation-offload: off [fixed]
generic-segmentation-offload: on
generic-receive-offload: on
large-receive-offload: off [fixed]
rx-vlan-offload: on [fixed]
tx-vlan-offload: on [fixed]
ntuple-filters: off [fixed]
receive-hashing: off [fixed]
highdma: on [fixed]
rx-vlan-filter: off [fixed]
vlan-challenged: off [fixed]
tx-lockless: off [fixed]
netns-local: off [fixed]
tx-gso-robust: off [fixed]
tx-fcoe-segmentation: off [fixed]
tx-gre-segmentation: off [fixed]
tx-udp_tnl-segmentation: off [fixed]
fcoe-mtu: off [fixed]
loopback: off [fixed]
Regards,
George
Disable offloading on the nodes with: ethtool -K interfaceName gro
off
gso off tso off
And then try it again
El 16/12/2014 18:36, "Georgios Dimitrakakis" escribió:
Hi all!
In my OpenStack installation (Icehouse and use nova legacy
networking) the VMs are talking to each other over a 1Gbps network
link.
My issue is that although file transfers between physical
(hypervisor) nodes can saturate that link transfers between VMs
reach very lower speeds e.g. 30MB/s (approx. 240Mbps).
My tests are performed by scping a large image file (approx. 4GB)
between the nodes and between the VMs.
I have updated my images to use e1000 nic driver but the results
remain the same.
What are any other limiting factors?
Does it has to do with the disk driver I am using? Does it play
significant role the filesystem of the hypervisor node?
Any ideas on how to approach the saturation of the 1Gbps link?
Best regards,
George
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