On 12/16/2014 11:33 AM, Georgios Dimitrakakis wrote:
Rick,

I haven't tried that yet

I 'll do it asap and post the results.


Can you recommend any specific tests that I should run on netperf?

I would start with this on the VM from which you are executing the scp:

netperf -t TCP_STREAM -H <name or IP of other VM>

If you happen to install from source (preferably top of trunk) I would suggest:

./configure --enable-demo

before building the netperf binary and then you can do something like:

netperf -t TCP_STREAM -H <name or IP of other VM> -D 1.0 -l <time>

where I would make <time> 10 or 20 seconds longer than it takes before the scp starts slowing down.

rick



Regards,


George

On 12/16/2014 11:09 AM, Georgios Dimitrakakis wrote:
Changing

gso on
tso on
gro off


got me back to the initial status.


Although now it starts with approximately 65-70MB/s  for a few seconds
but then it drops down to 30MB/s

What do you see if you use a "pure" networking benchmark such as
netperf or iperf?

rick jones

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