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Re:Let's Remove the Global Interpreter Lock by goerz on Tuesday August 15, 2017 @10:58AM (#15018787)
Is there a way to disable this? In an HPC environment, I don't want routines going multi-core without my explicit permission, under any circumstances. I will already have manually set up the parallelization to be at the highest logical level. If using Python, that usually means I have planned out the number of processes to be equal to the number of cores. If each process then starts doing its own multicore calculation (badly load-balanced!) it overtaxes the node and slows everything down.

I really wish numpy/pandas/scipy wouldn't do this kind of uncontrollable parallelization.

Re:Let's Remove the Global Interpreter Lock by yaroslavvb on Tuesday August 15, 2017 @07:18PM (#15023619)
Underlying implementations often have a way to disable parallelism, ie, OMP_NUM_THREADS=1 or MKL_NUM_THREADS=1