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<H2>8.4 例子</H2>
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<H3>8.4.1 剖析器实现</H3>

<P>假设剖析器希望累加由MPI-SEND函数发送的全部数据量以及函数中所花费的全部时间。这可以繁琐的获取</P>

<P>static int totalBytes;</P>

<P>static double totalTime;</P>

<P>int MPI_SEND(void * buffer, const int count, MPI_Datatype datatype,
</P>

<P>int dest, int tag, MPI_Comm comm)</P>

<P>{</P>

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<P>double tstart = MPI_Wtime(); /* Pass on all the arguments */</P>

<P>int extent;</P>

<P>int result = PMPI_Send(buffer, count, datatype, dest, tag, comm);</P>

<P>totalBytes += count * MPI_Type_size(datatype, &amp;extent); /* Accumulate
byte count */</P>

<P>totalTime += MPI_Wtime() - tstart; /* and time */</P>

<P>return result;</P>
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<P>}</P>

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<TD align=left>Copyright: NPACT </TD>

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