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<TITLE>HPL_sdrv HPL 2.0 Library Functions September 10, 2008</TITLE> |
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ALINK = "#ffff00"> |
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<H1>Name</H1> |
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<B>HPL_sdrv</B> Send and receive a message. |
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<H1>Synopsis</H1> |
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<CODE>#include "hpl.h"</CODE><BR><BR> |
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<CODE>int</CODE> |
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<CODE>HPL_sdrv(</CODE> |
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<CODE>double *</CODE> |
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<CODE>SBUF</CODE>, |
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<CODE>int</CODE> |
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<CODE>SCOUNT</CODE>, |
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<CODE>int</CODE> |
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<CODE>STAG</CODE>, |
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<CODE>double *</CODE> |
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<CODE>RBUF</CODE>, |
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<CODE>int</CODE> |
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<CODE>RCOUNT</CODE>, |
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<CODE>int</CODE> |
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<CODE>RTAG</CODE>, |
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<CODE>int</CODE> |
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<CODE>PARTNER</CODE>, |
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<CODE>MPI_Comm</CODE> |
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<CODE>COMM</CODE> |
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<CODE>);</CODE> |
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<H1>Description</H1> |
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<B>HPL_sdrv</B> |
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is a simple wrapper around MPI_Sendrecv. Its main purpose is |
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to allow for some experimentation and tuning of this simple function. |
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Messages of length less than or equal to zero are not sent nor |
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received. Successful completion is indicated by the returned error |
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code HPL_SUCCESS. |
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<H1>Arguments</H1> |
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<PRE>
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SBUF (local input) double * |
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On entry, SBUF specifies the starting address of buffer to be |
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sent. |
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</PRE>
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<PRE>
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SCOUNT (local input) int |
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On entry, SCOUNT specifies the number of double precision |
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entries in SBUF. SCOUNT must be at least zero. |
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</PRE>
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<PRE>
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STAG (local input) int |
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On entry, STAG specifies the message tag to be used for the |
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sending communication operation. |
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</PRE>
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<PRE>
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RBUF (local output) double * |
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On entry, RBUF specifies the starting address of buffer to be |
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received. |
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</PRE>
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<PRE>
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RCOUNT (local input) int |
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On entry, RCOUNT specifies the number of double precision |
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entries in RBUF. RCOUNT must be at least zero. |
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</PRE>
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<PRE>
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RTAG (local input) int |
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On entry, RTAG specifies the message tag to be used for the |
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receiving communication operation. |
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</PRE>
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<PRE>
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PARTNER (local input) int |
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On entry, PARTNER specifies the rank of the collaborative |
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process in the communication space defined by COMM. |
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</PRE>
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<PRE>
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COMM (local input) MPI_Comm |
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The MPI communicator identifying the communication space. |
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</PRE>
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<H1>See Also</H1> |
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<A HREF="HPL_send.html">HPL_send</A>, |
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<A HREF="HPL_recv.html">HPL_recv</A>. |
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