D01.12. FMS Hardware Parameter ISYNC

FMS Hardware Parameter ISYNC

Integer

This parameter controls how FMS compute tasks are synchronized. The following options are available:

0
Use semaphores. When a task completes, it is put to "sleep", releasing it's processor back to the system. This processor then becomes available to service FMS I/O tasks or other jobs. This value of ISYNC results in the maximum throughput of the system.
1
Use spin-locks. When a task completes, it goes into a polling loop waiting for more work to do. Because the operating system cannot distinguish between polling and useful work, the task continues to tie up the processor. On some systems this can produce a deadlock condition if the number of tasks (FMS or other jobs) exceeds the number of processors. For this reason, this option is not implemented on all systems. Typically this feature is only used on special hardware dedicated to a single FMS application.

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