Changes between Initial Version and Version 1 of bgas-user:bgas-manpages:jb_finalize

Timestamp:

09/30/14 20:51:32 (10 years ago)

Author:

foszczynski

Comment:

--

bgas-user:bgas-manpages:jb_finalize

@@ +1 @@
+= jb_finalize =
+
+== Name ==
+
+//jb_finalize// - terminates the JBRT environment.
+
+== Synopsis ==
+
+{{{
+#include "jbcnl.h";
+
+void jb_finalize( void);
+}}}
+
+Include with //-I/bgsys/local/bgas/jbrt/jbcn/include//, link with //-L/bgsys/local/bgas/jbrt/jbcn/lib -ljbcn//.
+
+== Description ==
+
+//jb_finalize()// deallocates the shared memory buffers used by the JBCNL and triggers termination of the JBRT's IO node infrastructure and reaping of any remaining IO node user processes. //jb_finalize()// shall be called at the end of the compute node application to ensure proper IO node cleanup.
+
+No JBCNL functions must be called after //jb_finalize()//; doing so results in undefined behaviour.
+
+//jb_finalize()// uses a global MPI barrier for synchronization before performing any cleanup operations; therefore, it is a globally blocking call and must furthermore be called before //MPI_Finalize()//. This is to ensure that the JBSD shutdown is not triggered while other MPI tasks are still communicating with the IO node.
+
+As for //MPI_Finalize()//, //jb_finalize()// is not thread-safe and must be called by one thread only (though this thread does not necessarily have to be the one which called //jb_init()//).
+
+== Return value ==
+
+//jb_finalize()// does not return a value and does not set "errno".