PCIE Utilization (Myricom)

The Myrinet card uses 8 lanes in PCIe. To check, whether the port it is connected to provides all 8, enter the command:

  lspci -vv | fgrep -A 50 Myri | egrep '(LnkCap|LnkSta)'

The output should look like this:

 LnkCap: Port #0, Speed 2.5GT/s, Width x8, ASPM L0s, Latency L0 unlimited, L1 unlimited

 LnkSta: Speed 2.5GT/s, Width x8, TrErr- Train- SlotClk- DLActive + BWMgmt- ABWMgmt-