My Altera Quartus builds show this warning...

Warning (18236): Number of processors has not been specified which may cause overloading on shared machines.  Set the global assignment NUM_PARALLEL_PROCESSORS in your QSF to an appropriate value for best performance.

How do I suppress this warning?


Add this tcl expression...

set_global_assignment -name NUM_PARALLEL_PROCESSORS 4

... to either assignment_defaults.qdf or the .qsf file. Both should be in the project's directory. The .qdf file may need to be created.

  • 1
    \$\begingroup\$ Probably worth marking this as accepted to stop the system bumping it back to the homepage. \$\endgroup\$ – Tom Carpenter Jun 30 '17 at 16:12
  • \$\begingroup\$ There is also an option to use all available processors, which also gets rid of the warning, and adjusts the setting to whatever machine the compile runs on. \$\endgroup\$ – Simon Richter Oct 9 '18 at 18:40
  • \$\begingroup\$ @SimonRichter, what name and value would be used? \$\endgroup\$ – JimFred Oct 10 '18 at 19:21
  • \$\begingroup\$ @JimFred set_global_assignment -name NUM_PARALLEL_PROCESSORS ALL \$\endgroup\$ – matli Mar 13 at 14:47

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