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## psb_barrier -- Sinchronization point parallel environment

    call psb_barrier(icontxt)

This subroutine acts as an explicit synchronization point for the PSBLAS parallel virtual machine.

Type:
  Synchronous.
On Entry
icontxt
  the communication context identifying the virtual parallel machine.
  Scope: global.
  Type: required.
  Intent: in.
  Specified as: an integer variable.