<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML3.2 EN"> <HTML> <HEAD> <META NAME="GENERATOR" CONTENT="DOCTEXT"> <TITLE>MPE_Seq_begin</TITLE> </HEAD> <BODY BGCOLOR="FFFFFF"> <A NAME="MPE_Seq_begin"><H1>MPE_Seq_begin</H1></A> Begins a sequential section of code. <H2>Synopsis</H2> <PRE> void MPE_Seq_begin( MPI_Comm comm, int ng ) </PRE> <H2>Input Parameters</H2> <DL> <DT><B>comm </B><DD>Communicator to sequentialize. <DT><B>ng </B><DD>Number in group. This many processes are allowed to execute at the same time. Usually one. </DL> <P> <H2>Notes</H2> 'MPE_Seq_begin' and 'MPE_Seq_end' provide a way to force a section of code to be executed by the processes in rank order. Typically, this is done with <PRE> MPE_Seq_begin( comm, 1 ); <code to be executed sequentially> MPE_Seq_end( comm, 1 ); </PRE> Often, the sequential code contains output statements (e.g., 'printf') to be executed. Note that you may need to flush the I/O buffers before calling 'MPE_Seq_end'; also note that some systems do not propagate I/O in any order to the controling terminal (in other words, even if you flush the output, you may not get the data in the order that you want). <P><B>Location:</B>../src/misc/src/mpe_seq.c<P> </BODY></HTML>
