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Move output.csv file open to the the main function and limit to rank 0 #132

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Move output.csv file open to the the main function and limit to rank 0 #132

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@jprorama jprorama commented Oct 3, 2024

This avoids opening the file in all ranks, causing file open contention between ranks. Contention increases with rank count and stripe count.

Proposed partial fix for #131 for base write benchmarks.

@jprorama
Move output.csv file open to the the main function and limit to rank 0
c1d4a7a 
This avoids opening the file in all ranks, causing file open contention
between ranks.  Contention increases with rank count and stripe count.

Proposed partial fix for hpc-io#131 for base write benchmarks.
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