Gigabit Master Slave Mode: Determines which end of the connection designated as the master the other of which would be the slave. Speed and Duplex: Allows you to select the desired speed and duplex of the network adapter, the default of which is usually auto negotiation.
Keep in mind, the exact advanced settings and their names differ between vendors, adapter models, and even between different driver versions. 80 -serverģ3115 LocalAdmin 20 0 16140K 10416K CPU1 1 0:02 1.25% top -SHIzaġ2 root -100 - 0K 352K WAIT 0 0:09 0.36% ģ680 root 20 0 36848K 17800K kqread 4 0:01 0.You’ve probably seen the settings on the Advanced tab of a network adapter’s Properties before-it’s the same place where you access the driver details-but the settings aren’t so easy to understand. PID USERNAME PRI NICE SIZE RES STATE C TIME WCPU COMMANDĢ5393 root 99 0 9744K 5684K CPU4 4 8:31 86.84% iperf3 -verbose -format m -interval 10 -port 5201 -bind. Starting Test: protocol: TCP, 1 streams, 131072 byte blocks, omitting 0 seconds, 120 second test, tos 0 If you look at the stats under 11.1-U2, there are no interrupts recorded against em0, while under 11.1-U1 there are almost 8,000. I think you are correct about a possible issue with NIC offload. In terms of CPU usage, you are correct that when running under 11.1-U2 iperf3 uses more CPU, however it is single threaded and only reports on its usage. I've also attached a debug output when running 11.1-U2. 0.00-120.02 sec 9.32 GBytes 667 Mbits/sec receiverĬPU Utilization: local/receiver 35.3% (0.9%u/34.4%s), remote/sender 27.7% (0.9%u/26.9%s)Īlexander, I've repeated the tests and captured the top and systat output. Under 11.1-U2 using additional streams had no benefit on throughput, while on 11.1-U1 using additional streams will saturate the network link.įreeBSD 11.1-STABLE #0 r321665+de6be8c8d30(freenas/11.1-stable): Tue Feb 20 02:38:09 UTC amd64 Below are iperf tests showing differences in performance, all were performed using a single stream.
I then performed a manual update to 11.1-U2 and the network throughput once again dropped. I reverted to 11.1-U1 and confirmed that the network throughput returned. QE - FreeNAS 11.3-Beta1 Ready For TestingĪfter updating from 11.1-U1 to 11.1-U4 using the GUI, the maximum network throughput dropped from around 940 Mbps Out/660 Mbps In to around 125 Mbps Out/75 Mbps In.