I'm looking for some help with mpich (parallel processing). I've
got task-parallel-computing-node installed on two connected machines
(ivan and alexi), and task-parallel-computing-dev installed on
one of them (ivan). rsh-server is set up on both, and I've got
a ~/.rhosts file on each that allows me into both machines. I have
also set up the /etc/mpich/machines.LINUX with the fully qualified
domain names for the two machines. Finally, my home directory is
cross-mounted on both machines. The whole thing is on a private
network behind a firewall machine.
Here's what I've tried (from the front-end machine):
[EMAIL PROTECTED]:~$ tstmachines -v
Trying true on ivan.tuxnet.edu ...
Trying true on alexi.tuxnet.edu ...
Trying ls on ivan.tuxnet.edu ...
Trying ls on alexi.tuxnet.edu ...
Trying user program on ivan.tuxnet.edu ...
Trying user program on alexi.tuxnet.edu ...
[EMAIL PROTECTED]:~$ cp /usr/share/doc/mpich/examples/code/Makefile.in ~/
[EMAIL PROTECTED]:~$ cp /usr/share/doc/mpich/examples/code/cpi.c ~/
[EMAIL PROTECTED]:~$ mpireconfig Makefile
creating Makefile
[EMAIL PROTECTED]:~$ make cpi
/usr/lib/mpich/build/LINUX/ch_p4/bin/mpicc -O2 -c cpi.c
/usr/lib/mpich/build/LINUX/ch_p4/bin/mpicc -O2 -o cpi cpi.o -lm
[EMAIL PROTECTED]:~$ mpirun -np 2 cpi
At this point top shows on my front-end (ivan):
PID USER PRI NI SIZE RSS SHARE STAT LIB %CPU %MEM TIME COMMAND
634 cswingle 16 0 676 668 580 R 0 99.6 0.5 1:18 mpirun
It never seems to run cpi, and there are no rshd connections on my
other machine (alexi), nor does mpirun or cpi every show up on alexi.
mpirun just seems to hang. Looking at the source code leads me to
suspect that the program should immediately be asking me for the
number of intervals to use in the calculation, but I never get that far.
I've tried several of the other programs in the examples/code directory,
but they either don't compile correctly, or exhibit the same freeze when
I do mpirun.
Does anyone have any hints on what I'm doing wrong, or what I should
try next?
Thanks.
Chris
--
Christopher S. Swingley tel: 907-474-2689 cell: 322-1889
930 Koyukuk Drive, Suite 408C email: [EMAIL PROTECTED]
University of Alaska Fairbanks www.frontier.iarc.uaf.edu:8080/
Fairbanks, AK 99775 ~cswingle
PGP2 key: http://www.frontier.iarc.uaf.edu:8080/~cswingle/pgpkey.asc
GNUPG key: http://www.frontier.iarc.uaf.edu:8080/~cswingle/gnupgkey.asc
