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scitas-examples/MPI/Ring/ex5_README.txt
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ex5_README.txt
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To compile the ex5.* source files:
jmenu@castor:~/COURS > module load intelmpi/4.1.3
mpiicc -o ex5_c ex5.c
mpiicpc -o ex5_cxx ex5.cxx
mpiifort -o ex5_f90 ex5.f90
--
To run them on the front-end:
./ex5_c
and so on with ex5_cxx and ex5_f90
--
To run them in an interactive SLURM session:
jmenu@castor:~/COURS > salloc -n 4
salloc: Granted job allocation 43196
jmenu@castor:~/COURS > module load intelmpi/4.1.3
jmenu@castor:~/COURS > srun ./ex5_c
Hello, my rank is 2 among 4 tasks on machine c03, with my_var = 20 initially
Hello, my rank is 1 among 4 tasks on machine c03, with my_var = 10 initially
Hello, my rank is 3 among 4 tasks on machine c03, with my_var = 30 initially
Hello, my rank is 0 among 4 tasks on machine c03, with my_var = 0 initially
c03: rank 1 sends to 2 and receives from 0, my_var = 10
c03: rank 2 sends to 3 and receives from 1, my_var = 20
--- BARRIER! ---
c03: rank 0 sends to 1 and receives from 3, my_var = 0
c03: rank 3 sends to 0 and receives from 2, my_var = 30
Hello, my rank is 1 among 4 tasks on machine c03, with my_var = 0 finally
--- BARRIER! ---
Hello, my rank is 0 among 4 tasks on machine c03, with my_var = 30 finally
Hello, my rank is 3 among 4 tasks on machine c03, with my_var = 20 finally
Hello, my rank is 2 among 4 tasks on machine c03, with my_var = 10 finally
jmenu@castor:~/COURS >
--
To run them in batch mode:
Set the EXECUTABLE to be run in ex5.run, and then:
jmenu@castor:~/COURS > sbatch ex5.run
Submitted batch job 43314
jmenu@castor:~/COURS > cat slurm-43314.out
STARTING AT Thu Jun 19 12:20:26 CEST 2014
Currently Loaded Modulefiles:
1) intel/14.0.1 2) intelmpi/4.1.3
--> LAUNCH_DIR = /home/jmenu/COURS
--> EXECUTABLE = ./ex5_f90
--> ./ex5_f90 depends on the following dynamic libraries:
linux-vdso.so.1 => (0x00007fff0b502000)
libmpigf.so.4 => /opt/software/intel/14.0.1/lib64/libmpigf.so.4 (0x00007fb7faa74000)
libmpi.so.4 => /opt/software/intel/14.0.1/lib64/libmpi.so.4 (0x00007fb7fa409000)
libdl.so.2 => /lib64/libdl.so.2 (0x0000003ed0000000)
librt.so.1 => /lib64/librt.so.1 (0x0000003ed0c00000)
libpthread.so.0 => /lib64/libpthread.so.0 (0x0000003ed0800000)
libm.so.6 => /lib64/libm.so.6 (0x0000003ed1000000)
libc.so.6 => /lib64/libc.so.6 (0x0000003ed0400000)
libgcc_s.so.1 => /lib64/libgcc_s.so.1 (0x0000003467c00000)
/lib64/ld-linux-x86-64.so.2 (0x0000003ecfc00000)
Hello, my rank is 3 among 4 tasks on machine c03 with my_var = 30 initially
Hello, my rank is 0 among 4 tasks on machine c03 with my_var = 0 initially
Hello, my rank is 2 among 4 tasks on machine c03 with my_var = 20 initially
Hello, my rank is 1 among 4 tasks on machine c03 with my_var = 10 initially
--- BARRIER! ---
c03 : rank 20 sends to 0 and receives from = 2, my_var = 20
c03 : rank 30 sends to 1 and receives from = 3, my_var = 30
c03 : rank 0 sends to 2 and receives from = 0, my_var = 0
c03 : rank 10 sends to 3 and receives from = 1, my_var = 10
Hello, my rank is 2 among 4 tasks on machine c03 with my_var = 10 finally
Hello, my rank is 3 among 4 tasks on machine c03 with my_var = 20 finally
Hello, my rank is 1 among 4 tasks on machine c03 with my_var = 0 finally
--- BARRIER! ---
Hello, my rank is 0 among 4 tasks on machine c03 with my_var = 30 finally
FINISHED at Thu Jun 19 12:20:26 CEST 2014
jmenu@castor:~/COURS >
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