1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
|
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML3.2 EN">
<HTML>
<HEAD>
<META NAME="GENERATOR" CONTENT="DOCTEXT">
<TITLE>PetscGatherNumberOfMessages</TITLE>
</HEAD>
<BODY BGCOLOR="FFFFFF">
<A NAME="PetscGatherNumberOfMessages"><H1>PetscGatherNumberOfMessages</H1></A>
Computes the number of messages a node expects to receive
<H3><FONT COLOR="#CC3333">Synopsis</FONT></H3>
<PRE>
#include "petsc.h"
int PetscGatherNumberOfMessages(MPI_Comm comm,int *iflags,int *ilengths,int *nrecvs)
</PRE>
Collective on MPI_Comm
<P>
<H3><FONT COLOR="#CC3333">Input Parameters</FONT></H3>
<TABLE border="0" cellpadding="0" cellspacing="0">
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B><A HREF="../Sys/comm.html#comm">comm</A> </B></TD><TD>- Communicator
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>iflags </B></TD><TD>- an array of integers of length sizeof(<A HREF="../Sys/comm.html#comm">comm</A>). A '1' in ilengths[i] represent a
message from current node to ith node. Optionally PETSC_NULL
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>ilengths </B></TD><TD>- Non zero ilengths[i] represent a message to i of length ilengths[i].
Optionally PETSC_NULL.
</TD></TR></TABLE>
<P>
<H3><FONT COLOR="#CC3333">Output Parameters</FONT></H3>
<DT><B>nrecvs </B> -number of messages received
<br>
<P>
<P>
<P>
<H3><FONT COLOR="#CC3333">Notes</FONT></H3>
With this info, the correct message lengths can be determined using
<A HREF="../Sys/PetscGatherMessageLengths.html#PetscGatherMessageLengths">PetscGatherMessageLengths</A>()
<P>
Either iflags or ilengths should be provided. If iflags is not
provided (PETSC_NULL) it can be computed from ilengths. If iflags is
provided, ilengths is not required.
<P>
<H3><FONT COLOR="#CC3333">See Also</FONT></H3>
<A HREF="../Sys/PetscGatherMessageLengths.html#PetscGatherMessageLengths">PetscGatherMessageLengths</A>()
<BR><P><B><P><B><FONT COLOR="#CC3333">Level:</FONT></B>developer
<BR><FONT COLOR="#CC3333">Location:</FONT></B><A HREF="../../../src/sys/src/utils/mpimesg.c.html#PetscGatherNumberOfMessages">src/sys/src/utils/mpimesg.c</A>
<BR><A HREF="./index.html">Index of all Sys routines</A>
<BR><A HREF="../../index.html">Table of Contents for all manual pages</A>
<BR><A HREF="../singleindex.html">Index of all manual pages</A>
</BODY></HTML>
|
