Flow control means that some tasks cannot send more work to busy AMPs. If many AMPs are in flow control, response times degrade and become inconsistent. This is a more serious situation than simple AWT depletions because request priorities are not honored while messages are being retried.
To define a system Flow Control event, specify the number of AMPs that report flow control during the Qualification period. TASM does not distinguish between being in flow control for 1 msec and being in flow control for the entire interval. Different AMPs can be in flow control during the Qualification period, as long as the # of AMPs criterion is met.