I have been trying to to capture MPI traffic using ibdump for one way latency measurements (at the physical layer).
But all ibdump captures are IPoIB packets interleaved with Subnet monitoring packets such as perfqueries from the UFM/SM sweeps.
ibdump, 2.0.0-5, built on Aug 21 2013, 13:09:58. GIT Version: 41a4dd2
I have also tried: ibdump, 2.0.0-8, built on Apr 28 2014, 17:06:51. GIT Version: f8e989d
I have also used --mem-mode and --max-burst to prevent packet dropping but with no luck.
Ofed_info: MLNX_OFED_LINUX-2.0-22.214.171.124 (OFED-2.0-3.0.0)
transport: InfiniBand (0)
state: PORT_ACTIVE (4)
max_mtu: 4096 (5)
active_mtu: 4096 (5)
Using tshark -r sniffer.pcap| grep -i infiniband to parse the .pcap files, I typically get this:
|49||6.469888||LID: 35 -> LID: 1||InfiniBand 290 PERF (PortCounters)|
|50||6.469951||LID: 35 -> LID: 1||InfiniBand 290 PERF (PortCountersExtended)|
|239||36.492380||LID: 1 -> LID: 35||InfiniBand 290 PERF (PortCounters)|
|240||36.492388||LID: 1 -> LID: 35||InfiniBand 290 PERF (PortCountersExtended)|
|241||36.492477||LID: 35 -> LID: 1||InfiniBand 290 PERF (PortCounters)|
I would highly appreciate anyone who can help understand this?