| Title: | Parallel processing through Workstation Farms. |
| Notice: | MSBCS::HPC (renamed from HPCGRP::WORKSTATION_FARMS) |
| Moderator: | MSBCS::SYSTEM |
| Created: | Tue Oct 27 1992 |
| Last Modified: | Fri Jun 06 1997 |
| Last Successful Update: | Fri Jun 06 1997 |
| Number of topics: | 507 |
| Total number of notes: | 1791 |
A customer is using DecMPI on a 4 cpu 4100 system. They are experiencing library link problems as indicated below. They are getting unresolved references even though they are not referencing any pthreads. Unresolved: iprcid_ nanosleep __pthread_mutex_init __pthread_mutex_destroy __pthread_mutex_lock __pthread_mutex_unlock __pthread_cond_init __pthread_cond_destroy __pthread_cond_signal __pthread_cond_wait __pthread_create __pthread_join __pthread_exit swtch_pri fort: Severe: Failed while trying to link. The customers had done linking the library without any problem before. When they try to re-link, they are getting this problem. If someone can help me in this regard, I would greatly appreciate. Thanks Ravi.
| T.R | Title | User | Personal Name | Date | Lines |
|---|---|---|---|---|---|
| 501.1 | more information needed | MSBCS::SCHNEIDER | Say it with ASCII | Thu Apr 17 1997 11:40 | 16 |
Forgive me if I state what is obvious, but if the software linked
successfully before and fails now, then something changed in the
customer's procedures or environment. Can you find out what changed?
Also please specify the versions of DEC MPI, and of Digital UNIX, that
the customer is using now.
The references to nanosleep and pthread routines originate in the
DEC MPI libraries. I'm not sure about the other references. The
documentation for DEC MPI should specify the appropriate link options
to use, such as -lrt. I believe the appropriate options are different
for different versions of DEC MPI. What is the exact command that is
being used to link?
Regards,
Chuck Schneider
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| 501.2 | -lmpi -lrt -pthread | HPCGRP::BENSON | Thu Apr 17 1997 12:53 | 6 | |
Digital MPI uses threads internally so one must specify
-pthread when building. The realtime library is referenced too.
e.g. cc program.c -lmpi -lrt -pthread
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