Eric,
Are you testing against the Open MPI svn trunk?
I ask because on April 9 George commited a fix for the bug reported
by Thomas Jahns:
http://www.open-mpi.org/community/lists/devel/2013/04/12268.php
-Paul
On Tue, Apr 23, 2013 at 5:35 PM, Eric Chamberland
<eric.chamberl...@giref.ulaval.ca
<mailto:eric.chamberl...@giref.ulaval.ca>> wrote:
Hi Jeff,
thanks for your answer!
You inserted a doubt in my mind... and gave me hope... :-)
So I did some modifications on the code to help everyone:
1- it's now in "C"... :-)
2- Concerning your remark about arbitrary address: I am now using
the "offsetof" macro defined in "stddef.h" to compute the offset,
or displacement needed to create the datatype
3- I have simplified and reduced (again) the number of lines to
reproduce the error...
see "nested_bug.c" attached to this mail...
Output with openmpi 1.6.3:
----------------------------------------
Rank 0 send this:
{{1},{{2,3},{4,5}}}
Rank 1 received this: {{1},{{2,3},{4199789,15773951}}} *** ERROR ****
Expected output (still ok with mpich 3.0.3 and intel mpi 4):
----------------------------------------
Rank 0 send this:
{{1},{{2,3},{4,5}}}
Rank 1 received this: {{1},{{2,3},{4,5}}} OK
Thanks!
Eric
Le 2013-04-23 18:03, Jeff Squyres (jsquyres) a écrit :
Sorry for the delay.
My C++ is a bit rusty, but this does not seem correct to me.
You're making the datatypes relative to an arbitrary address
(&lPtrBase) in a static method on each class. You really need
the datatypes to be relative to each instance's *this* pointer.
Doing so allows MPI to read/write the data relative to the
specific instance of the objects that you're trying to
send/receive.
Make sense?
On Apr 23, 2013, at 5:01 PM, Eric Chamberland
<eric.chamberl...@giref.ulaval.ca
<mailto:eric.chamberl...@giref.ulaval.ca>> wrote:
another information: I just tested the example with Intel
MPI 4.0.1.007 and it works correctly...
So the problem seems to be only with OpenMPI... which is
the default distribution we use... :-/
Is my example code too long?
Eric
Le 2013-04-23 09:55, Eric Chamberland a écrit :
Sorry,
here is the attachment...
Eric
On 04/23/2013 09:54 AM, Eric Chamberland wrote:
Hi,
I have sent a previous message showing something
that I think is a bug
(or maybe a misuse, but...).
I worked on the example sent to have it
simplified: now it is almost
half of the lines of code and the structures are
more simple... but
still showing the wrong behaviour.
Briefly, we construct different MPI_datatype and
nests them into a final
type which is a:
{MPI_LONG,{{MPI_LONG,MPI_CHAR}*2}
Here is the output from OpenMPI 1.6.3:
Rank 0 send this:
i: 0 => {{0},{{3,%},{7,5}}}
i: 1 => {{1},{{3,%},{7,5}}}
i: 2 => {{2},{{3,%},{7,5}}}
i: 3 => {{3},{{3,%},{7,5}}}
i: 4 => {{4},{{3,%},{7,5}}}
i: 5 => {{5},{{3,%},{7,5}}}
MPI_Recv returned success and everything in
MPI_Status is correct after
receive.
Rank 1 received this:
i: 0 => {{0},{{3,%},{-999,$}}} *** ERROR ****
i: 1 => {{1},{{3,%},{-999,$}}} *** ERROR ****
i: 2 => {{2},{{3,%},{-999,$}}} *** ERROR ****
i: 3 => {{3},{{3,%},{-999,$}}} *** ERROR ****
i: 4 => {{4},{{3,%},{-999,$}}} *** ERROR ****
i: 5 => {{5},{{3,%},{-999,$}}} *** ERROR ****
Here is the expected output, obtained with
mpich-3.0.3:
Rank 0 send this:
i: 0 => {{0},{{3,%},{7,5}}}
i: 1 => {{1},{{3,%},{7,5}}}
i: 2 => {{2},{{3,%},{7,5}}}
i: 3 => {{3},{{3,%},{7,5}}}
i: 4 => {{4},{{3,%},{7,5}}}
i: 5 => {{5},{{3,%},{7,5}}}
MPI_Recv returned success and everything in
MPI_Status is correct after
receive.
Rank 1 received this:
i: 0 => {{0},{{3,%},{7,5}}} OK
i: 1 => {{1},{{3,%},{7,5}}} OK
i: 2 => {{2},{{3,%},{7,5}}} OK
i: 3 => {{3},{{3,%},{7,5}}} OK
i: 4 => {{4},{{3,%},{7,5}}} OK
i: 5 => {{5},{{3,%},{7,5}}} OK
Is it related to the bug reported here:
http://www.open-mpi.org/community/lists/devel/2013/04/12267.php
?
Thanks,
Eric
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Paul H. Hargrove phhargr...@lbl.gov <mailto:phhargr...@lbl.gov>
Future Technologies Group
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