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Antony July 15, 2005 06:37

Parallel processing in star3.24
 
Hello Everybody In our Institute we have starCD 3.24 solver with 16 processors (single host with 16 processor). I want to set up moving mesh case(Internal combustion Engine) with parallel computation i.e Parallel computation of single Host with 16 processors. Can anyone please help me .

Thanks in advance

Kevin July 15, 2005 13:04

Re: Parallel processing in star3.24
 
I want to know too!

Richard July 15, 2005 13:56

Re: Parallel processing in star3.24
 
Have you tried just typing 'star 16'?

Ben July 15, 2005 16:19

Re: Parallel processing in star3.24
 
lol the problem they will have is with the decomposition of the mesh, if they decompose auto then metis will fling the ASI's far and wide and Star wont run. You will have to do a manual decomp by sets and makes sure that each attach boundary is on one processor.

Antony July 19, 2005 00:45

Re: Parallel processing in star3.24
 
Thanks a lot Ben,

I tried with manual decomposition. It worked fine,but at the time of starting the case it exited with the message:

PNP: Initialized [2005-07-19-10:11:28] Automatic Sequential Automatic Parallel analyzer. PNP: Allocated "cliff,10" resource (10 processes). PNP: Overload STAR master processor with external moving mesh code. PNP: Assigned "cliff,10" to STAR solver (10 processes). PNP: Assigned "cliff,1" to external moving mesh code (1 process). PNP: Loading STAR solver dynamic shared object plug-ins. PNP: Loading MPICH 1.2.4 ch_shmem (ANL/MSU MPI) dynamic shared object plug-ins. PNP: Loading STAR user coding dynamic shared object plug-in. PNP: Loading STAR user coding dynamic shared object plug-in. PNP: Decomposing STAR mesh using "manual" method for 10 domains. PNP: Analyzing Moving mesh events PNP: Copying STAR shared input file "engn.prob" to domains. PNP: Copying STAR shared input file "engn.drp" to domains. PNP: Copying External moving mesh code input file "mvmesh.sh". PNP: Copying External moving mesh code input file "param.prp". PNP: Copying External moving mesh code input file "engn.mdl". PNP: Copying External moving mesh code input file "engn.evn". PNP: Copying External moving mesh code input file "engn.cgrd". PNP: Copying External moving mesh code input file "engn1.cgrd". PNP: Starting TRACKER task on "cliff" for monitoring host and process failures. PNP: Spawning STAR processes on single node. 3 - MPI_RECV : Message truncated [3] Aborting program ! [3] Aborting program! STAR 3.22.000 [StarKin_003]: sunos64_5.8-ultra3-f90_7.0-dso RUNNING, CASENAME: engn Child process exited unexpectedly 2 Abort - core dumped PNP: Shutdown [2005-07-19-10:13:09] Execution aborted by request (SIGABRT) after 100 seconds.

please let me know what could be the prolem.

Thanks

Antony


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