[MPICH] MPI_GET_ADDRESS

[William Gropp]

At 02:41 PM 4/23/2006, Kenneth Rempe wrote:
>Hi Bill,
>
>The output from configure on both AIX and Linux is "checking size of void 
>*... 4."
>So, it likes there is a problem with the sign fortran integers.

Yes, this looks like its going to be a "feature".  We'll add a warning 
about this to the documentation.

Bill


>Ken
>
>
>William Gropp wrote:
>>At 01:51 PM 4/21/2006, Kenneth Rempe wrote:
>>>Bill,
>>>
>>>Okay, what am I looking for in the configure output. Is there a why to 
>>>override what configure is setting?
>>>Also, is this a problem because in C++ you can use an unsigned int for 
>>>addresses up to 4GB but in fortran it is a signed integer
>>>which only can go up to 2GB?
>>
>>The first thing to look for is the size of void *.  The line should look like
>>
>>checking size of void *...8
>>
>>If the size if 4, then you have 32 bit pointers.  There may then be a 
>>problem, as you suspect, with the signed integer in Fortran.
>>
>>Bill
>>
>>
>>>Thanks
>>>
>>>Ken
>>>
>>>William Gropp wrote:
>>>
>>>>At 08:02 AM 4/21/2006, Kenneth Rempe wrote:
>>>>
>>>>>...
>>>>>On both the Linux and IBM the value of MPI_ADDRESS_KIND is set to a 4 
>>>>>byte integer.
>>>>
>>>>
>>>>That's the problem.  If the sizeof a pointer is 8 bytes, then 
>>>>MPI_ADDRESS_KIND should be an 8 byte integer. What is the output of 
>>>>configure for MPICH2?  Note that MPICH2 must be configured with 
>>>>compatible compiler options for systems that support multiple datatype 
>>>>sizes (such as 32 and 64bit pointers).
>>>>
>>>>Bill
>>>>
>>>>
>>>>>Linux   Red Hat Enterprise 3
>>>>>           Lahey Fortran Compiler version 6.2c
>>>>>           gcc version 3.2.3
>>>>>
>>>>>IBM    Aix 5.2
>>>>>           xlf compiler version 8.1
>>>>>           xlc compiler version 6.0
>>>>>
>>>>>
>>>>>--
>>>>>*** NOTE: soa.com will no longer be used after February 1, 2006, 
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>>>>>
>>>>>Kenneth R. Rempe                * email: 
>>>>>kenneth.rempe at studsvikscandpower.com
>>>>>Studsvik Scandpower, Inc.       * 504 Shoup Avenue Suite #201     * 
>>>>>voice:  208-522-4630
>>>>>Idaho Falls, ID USA 83402-3502  * fax:    208-522-1187
>>>>
>>>>
>>>>William Gropp
>>>>http://www.mcs.anl.gov/~gropp
>>>
>>>
>>>
>>>--
>>>*** NOTE: soa.com will no longer be used after February 1, 2006, please 
>>>change your address book ***
>>>
>>>Kenneth R. Rempe                * email: 
>>>kenneth.rempe at studsvikscandpower.com
>>>Studsvik Scandpower, Inc.       * 504 Shoup Avenue Suite #201     * 
>>>voice:  208-522-4630
>>>Idaho Falls, ID USA 83402-3502  * fax:    208-522-1187
>>
>>William Gropp
>>http://www.mcs.anl.gov/~gropp
>
>
>

William Gropp
http://www.mcs.anl.gov/~gropp