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MPICH是MPI的重要研究,提供了一系列的接口函数,为并行计算的实现提供了编程环境.

Details on wrappergen:

The information that used to be in this file has been incorporated into
the Users' Guide, which can be found in the mpich/doc directory.

There are some known bugs:

(From Rob Cunningham <[e-mail]>)

	1. Wrappergen infinite loops when I have a bug in the wrapper and call
it with the -f option and no space between the -f and the name.
	% wrappergen -w LL_bug.w -fllfn_proto -o LL_wrapper.c
	No function list file.  Assuming all functions profiled.
	No function prototype file.  Assuming /seismic3/acp/mpi/mpich/profiling/wrappergen/mpi_proto.
	Unrecognized escape '{{this_fn_name}}' in file LL_bug.w, line 10.
	Unrecognized escape '{{this_fn_name}}' in file LL_bug.w, line 10.
	...
/* LL_bug.w */
#include <stdio.h>
#include <stdarg.h>
#include "mpi.h"

{{forallfn fn_name}}
int {{fn_name}}_ncalls_{{fileno}};
{{endforallfn}}

{{fnall fn_name }}
  MPE_Log_event({{this_fn_name}}_start,{{fn_name}}_ncalls_{{fileno}},
		"{{fn_name}} Start");
  {{callfn}}
  MPE_Log_event({{fn_name}}_end,{{fn_name}}_ncalls_{{fileno}}++,
		"{{fn_name}} End");
{{endfnall}}
/* LL_bug.w */

	2. Callfn doesn't do the right thing when the function returns a void.
	{{callfn}} seems to always tries to return a value.

	3. wrappergen doesn't work properly for Ansii C code, because it
	defines the wrapper routines using K&R style C, which has different
	variable promotion rules than Ansii C.