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MLNX_OFED provides multiple utilities for debugging device status and connection status within the InfiniBand fabric. This time we will introduce some of them.
ibdiagnet
Commentary
It scans the fabric and extracts all available information about connectivity and devices.
Generate the following files in the output directory. (The directory is determined by the -o option.)
Usage
| output file | Commentary |
| ibdiagnet.log | a dump of all reports generated by the given flag |
| ibdiagnet.lst | List of all nodes, ports and links in the fabric |
| ibdiagnet.fdbs | Dumping the unicast forwarding table of a fabric switch |
| ibdiagnet.mcfdbs | Dump multicast forwarding table on fabric switch |
| ibdiagnet.masks | Include duplicate records if port/node GUIDs are duplicated |
| ibdiagnet.sm | List all subnet managers (state and priority) in the fabric |
| ibdiagnet.pm | Dump fabric link performance counter values |
| ibdiagnet.pkey | A dump of the existing partitions and the hosts they belong to |
| ibdiagnet.mcg | Dumping multicast groups, their properties and host port members |
| ibdiagnet.db | Dumping the internal subnet database |
ibv_devices
Commentary
Show available InfiniBand devices from user space (including Node GUID).
Usage
ibv_devices
ibv_devinfo
Commentary
Query InfiniBand devices and display information about devices available from user space.
Usage
ib status
Commentary
Shows basic information from the InfiniBand driver of the local node. Outputs include LID, SMLID, port state, port physical state, port signal width, port speed.
Usage
ibportstate
Commentary
Query physical port and logical link states for InfiniBand ports. It also adjusts the speed of the enabled InfiniBand ports.
Usage
ibportstate [-d] [-e] [-v] [-V] [-D] [-G] [-s] \
[-C] [-P] [-t] ¥
[] [ []]
ib route
Commentary
Display the forwarding table using SMP for a specific switch LID and optional lid (mlid) region.
Usage
ibroute [-h] [-d] [-v] [-V] [-a] [-n] [-D] [-G] [-M] [-s] \
[-C] [-P] [-t] ¥
[ [ []]]
perfquery
Commentary
Queries performance and error counters for InfiniBand ports. You can also reset the counter after reading it, or simply reset it.
Usage
perfquery [-h] [-d] [-G] [-a] [-l] [-r] [-C] [-P] [-R]
[-t] [-V] [[[port][reset_mask]]]
ibcheckerrs
Commentary
Validate InfiniBand ports and report errors in counters that exceed thresholds.
Usage
ibhosts / ibswitches
Commentary
(ibhosts) Extract CA nodes in the InfiniBand subnet topology.
(ibswitches) Extract switches in the InfiniBand subnet topology.
Usage
ibhosts [-h] [] | -C ca_name –t(timeout)
ibswtiches [-h] [] | -C ca_name –t(imeout)
ibdump (supported since MLNX_OFED 1.5.1)
available hardware
Mellanox ConnectX / ConnectX-2 Adapter Device
Commentary
Dumps InfiniBand traffic sent and received on Mellanox ConnectX/ConnectX-2 adapter InfiniBand ports. The dump file can be loaded by Wireshark and visually analyzed for traffic.
Usage
ibdump [options]
Operation method for HCA sniffing
- Run ibdump with options
・Run the application for the traffic you want to analyze
Stop ibdump ( CTRL-c ) or wait until the data buffer is full
Open Wireshark and load the generated file
*Wireshark can be downloaded from www.wireshark.org for the current release. See the ibdump_release_note.txt file for details.
The above information is extracted from Mellanox_OFED_Linux_user_manual, if you want to check the details
You can get it from http://www.mellanox.com/ > Downloads > InfiniBand/VPI SW/Drivers > MLNX_OFED. Or refer to the manual from Linux using the man command.