User guide

2–FastFabric TUI Menu
Fast Fabric IB Host Verification/Admin Menu
IB0054607-01 A 2-27
Refresh SSH Known Hosts
(Linux) This will run the setup_ssh -U command to refresh the SSH known
hosts list on this server for the IPoIB and Management Networks. This may be
used to update security for this host if hosts are replaced, reinstalled, renamed, or
repaired.
Check MPI Performance
(Host) This will do a quick check of PCI and MPI performance using end to end
latency and bandwidth tests.
Based on the answer to the prompt shown below either the
iba_host_admin
mpiperfdeviation
or the iba_host_admin mpiperf command will be used.
Test Latency and Bandwidth deviation between all hosts? [y]:
Answering y is recommended, this will run the iba_host_admin
mpiperfdeviation
command to do pairwise analysis of latency and bandwidth for
the selected hosts and report pairs outside an acceptable tolerance range. By
default performance is compared relative to other hosts in the fabric (with the
assumption that all hosts selected for a given run should have comparable
InfiniBand performance). Failing hosts will be clearly indicated.
Answering n will run the
iba_host_admin mpiperf command. This displays the
MPI latency and bandwidth between pairs of hosts (1-2, 3-4, 5-6, etc). The numbers
reported should be checked against the practical PCI speeds in the Performance
Impact table in the QLogic Fabric Software Installation Guide. If any pairs are not
in the expected performance range, it should be considered a failure for those pairs
of hosts.
For either test, If any hosts fail, carefully examine the failing hosts to verify the HCA
models, PCI slot used, BIOS settings and any motherboard jumpers related to
devices on PCI buses or slot speeds. Also verify the HCA and riser cards are
properly seated.
The results of either test are also written to the
test.res file which may be
viewed using the View iba_host_admin result files. Refer to FastFabric
Command Line Interface Reference Guide for more details.
The bandwidth reported should also be checked against the practical PCI speeds
in the Performance Impact section. If all pairs are not in the expected performance
range, carefully examine all hosts to verify the HCA models, PCI slot used, BIOS
NOTE:
This option is available for the QLogicIB packaging of OFED, but is not
presently available for other packagings of OFED.