Re: UPC Run time error: Out of shared memory

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This man page should answer your question, look for -shared-heap
  http://upc.lbl.gov/docs/user/upcrun.html

Regards,
Costin

> Hi all,
>      And dear Hargrove I am thankful for your reply . I did not  
> recieve
> the reply for my previous problem regarding native compiler flags on
> my email address, instead I read the reply on upc mailing archive.
> That problem is solved, and also I want to say that we are using
> myrinet with myrinet express (mx) library, although we have a giga
> bit ethernet as well. We are using MPI conduit because UPC does not
> support mx library.
>      Now I am facing another problem of "Out of shared memory" run  
> time
> error. Our cluster consists of 4 v890 servers connected via myrinet
> and each server has 32 GB of main memory. I am writing the code
> given below, it works for 2048x2048 grid size. It also works well
> with 4096x4096 and 8 threads accros the cluster nodes. The same code
> gives error for 16 threads using the grid size 4096x4096. I dont
> know what am I doing wrong here, suggestions will be appreciated.
> The code is gives below:
>
> #define size_x 4096
> #define size_x 4096
>
> shared [size_x*size_y/THREADS] double *ez;
> shared [size_x*size_y/THREADS] double *hy;
> shared [size_x*size_y/THREADS] double *hx;
>
> ez=(shared [size_x*size_y/THREADS] double*)
> upc_all_alloc(THREADS,size_x*size_y*sizeof(double));
>
> ez=(shared [size_x*size_y/THREADS] double*)
> upc_all_alloc(THREADS,size_x*size_y*sizeof(double));
>
> ez=(shared [size_x*size_y/THREADS] double*)
> upc_all_alloc(THREADS,size_x*size_y*sizeof(double));
>
> The code is compiled and run with the following commands:
>
> /home/aftab/berkeley_upc-2.6.0/upcc "-Wc,-xO4" -T16 --network=mpi
> -pthreads=4 -shared-heap=256MB 2dfdtd-pri.upc -o 2DFDTD
>
> /home/aftab/berkeley_upc-2.6.0/upcrun -n16 2DFDTD
>
> The error message is given as:
>
> UPC Runtime error: out of shared memory
>  Local shared memory in use:     0 MB per-thread,     0 MB total
>  Global shared memory in use:  128 MB per-thread,  2060 MB total
>  Total shared memory limit:    256 MB per-thread,     0 MB total
> upc_all_alloc unable to service request from thread 0 for 134225920  
> more
> bytes
>
>
>
>
>
> -- 
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>

-- 
Costin C. Iancu                                                       cciancu_at_lbl_dot_gov
Future Technologies Group                                 Phone:  
510-495-2122
Lawrence Berkeley National Laboratory           Fax:   510-486-6900

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