[mpich-discuss] source code query

Huiwei Lu huiweilu at mcs.anl.gov
Sat Sep 14 19:39:10 CDT 2013

Hi, Volkan,

What version are you looking at? If there is no specific reason, we would
recommend you to use the newest mpich-3.0.4 which can be downloaded from

The following are some documents to help you understand the function
MPIR_Err_create_code. Basically what this function does is to return a
error code when you do something wrong in MPI_ calls.

To help you improve your code reading skills to solve future problems like
this one. I would like to share with you one of my favorite books: Code
Reading: The Open Source Perspective. http://www.spinellis.gr/codereading/

Huiwei Lu

On Fri, Sep 13, 2013 at 3:48 AM, 陈涛 <volkanchen at gmail.com> wrote:

> To whom it may concern,
> I am trying to analyzing the source code of MPICH2. Currently I am
> studying the function MPI_Send(const void *buf, int count, MPI_Datatype
> datatype, int dest, int tag,MPI_Comm comm) in the file send.c. But it
> involves a commonly function MPIR_Err_create_code. It is really beyond my
> ability to understand this one and it drives me crazy. Could you help me
> with that or recommend me some materials analyzing that?
> Looking forward to your early reply.
> Kind regards!
> Volkan
> 2013-09-13
> 你好!
> 我正分析MPICH2的源代码。目前在看send.c文件中的函数MPI_Send(const void *buf, int count,
> MPI_Datatype datatype, int dest, int tag,MPI_Comm comm)
> 。其中涉及一个常用的函数MPIR_Err_create_code。我真的是搞不清楚它的作用是什么。请问高手能不能帮我分析一下或推荐相关的资料!不胜感激!
> 祝好!
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