Hi Jeff and all members of the list, You were perfectly right about the wrong string lengths, but even if corrected, I do still have the same deadlock problems on this simple child/parent process. Could it be some bug specifically related to the CentOS 5.2 Linux distribution ?
Best regards Lionel Jeff Squyres wrote:
It does not hang for me...But I do notice one odd thing in your extended program: you send 3 characters of the string "hi2" -- that will not include the trailing \0.You might want to send 4 characters to ensure to include the trailing \0. On Mar 25, 2009, at 9:52 AM, Lionel Gamet wrote:Dear openmpi users and developers, I encounter dead-lock problems with spawn processes in openmpi, as soon as more than one Send/Recv operation is done. The test case I used has been extracted from the MPICH2 examples. It is a simple parent/child program. The original version (see attached file parent+child_from_MPICH2.tar.gz) works well under openmpi. I use commands in run.cmd to compile and execute this example. I have tried to add one more communication by duplicating the send/recv calls of the original MPICH2 source (see modified files in attached tar archive parent+child_with_more_send_recv.tar.gz) and get dead-lock problems when executing this modified version ... Can anybody reproduce this ? I am using openmpi version 1.3 on a Linux CentOS 5.2 (i386), with all updates of the distribution done. See also attached file ompi_info.txt.gz (result of the command ompi_info --all). Thanks in advance for any hints, Best regards Lionel<parent+child_from_MPICH2.tar.gz><parent+child_with_more_send_recv.tar.gz><ompi_info.txt.gz><Lionel_Gamet.vcf><ATT7299515.txt>
<<attachment: Lionel_Gamet.vcf>>
