System Balance (balance)

The System Balance test has been designed to demonstrate that all processors
in a partition operate at the same relative performance, and that the system
is capable of running multiple parallel applications concurrently in unique,
non-overlapping partitions.  To do this, the System Balance test consists of
two phases.

In the first phase, the single processor 100x100 Linpack SAT is executed
concurrently on all processors in the partition being used.  When all
processors have finished running Linpack, the minimum, maximum, average,
and median floating point performance for all the nodes is reported.  Also
reported is the standard deviation and the percentage of performance
variation for all processors running the test.

The second phase of the System Balance Sat creates from one to four
non-overlapping sub-partitions in the partition being used. The number
created depends on how many nodes are in the partition being used to run
the System Balance Sat in.  Once the sub-partitions have been created, a
parallel SAT is executed in each sub-partitions concurrently.  The pass/fail
results for each test is reported.  The parallel SATs currently used for
execution in the sub-partitions are PFS, MXM, COMTEST, and MPLINPACK.

The System Balance Sat runs on one or more nodes, and has no partition
size restrictions.  The System Balance Sat passes only if there are no fails
of any tests in the first and second phases.
