Hi Stig, Am 24.03.2016 um 11:10 schrieb Stig Telfer: > I had a similar experience earlier this week. I was testing bond performance on a dual-port Mellanox NIC, LACP-bonded with layer 3+4 transmit hash. First run of iperf (8 streams), I saw a reasonable distribution across the links. Shortly after that, performance dropped to a level that suggested no distribution. I didn’t look into it any further at the time.
I think this is something iperf or OS related. We have the same here. The first call always reports a higher throughput than the consecutive runs. I make it a habit of calling iperf at least 3 times to see if the output is stable. > > This was on CoreOS beta (kernel 4.3-6 IIRC). > > If our experiences have a common root cause, I have a different > distro and NIC to you, which might eliminate those components. I should have the kit back in this configuration within a week, I’ll try to probe and report back. Any feedback would be welcome :) As stated above, multiple calls to iperf for stable results are a good idea. Greetings -Sascha- _______________________________________________ OpenStack-operators mailing list OpenStack-operators@lists.openstack.org http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-operators
