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For this example 16 MPI tasks are executed. Once you add the linux command strace to the code start job you create two files per linux process (MPI task) , in . For this case example 32 trace files are created.
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#!/bin/bash #SBATCH --nodes=2 #SBATCH --ntasks-per-node=8 #SBATCH --time=01:00:00 #SBATCH --partition=standard96 srun strace -ff -t -o trace -e open,openat ./myexample.bin |
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The example code creates one file with the name mpiio_zxyblock.dat. You need to expect a number of open entries from the system. For the example above, 258 open statements include only one open from the application code.
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