HP XC System 3.x Software - Manual (Page 69)

NOTE: The --nodelist=nodelist option is particularly useful for determining
problematic nodes.
If you use this option and the --nnodes=n option, the --nnodes=n option is ignored.
test Indicates the test to perform. The following tests are available:
cpu
Tests CPU core performance using the Linpack benchmark.
cpu_usage Tests CPU core usage. All CPU cores should be idle during
the test. This test reports a node if it is using more than
10% (by default) of its CPU cores.
The head node is excluded from this test.
memory Uses the streams benchmark to test memory performance.
memory_usage Tests memory usage. This test reports a node that uses
more than 25 percent (by default) of its memory.
network_stress Tests network performance. Check network performance
under stress using the Pallas benchmark's Alltoall,
Allgather, and Allreduce tests. These tests should be
performed on a large number of nodes for the most
accurate results.
The default value for the number of nodes is 4, which is
the minimum value that should be used.
The --all_group option allows you to select the node
grouping size.
network_bidirectional Tests network performance between pairs of nodes using
the Pallas benchmark's Exchange test.
network_unidirectional Tests network performance between pairs of nodes using
the HP MPI ping_pong_ring test.
You can list the available tests with the ovp -l command:
$ ovp -l
Test list for perf_health:
cpu_usage
memory_usage
cpu
memory
network_stress
network_bidirectional
network_unidirectional
By default, the ovp command reports if the nodes passed or failed the given test. Use the ovp --verbose
option to display additional information.
The results of the test are written to a file in your home directory. The file name has the form
ovp_node_date[rx].log
where node is the node from which the command was launched and date
is a date stamp in the form mmddyy. Subsequent test runs of the test are identified with an r (for run) and
a number; this prevents a log file from overwriting a previous one. The --chdir= option enables you to
designate a directory different from your home directory as the execution directory.
The following is an example of the CPU usage test:
7.6 Running Performance Health Tests 69