import tensorflow as tf import multiprocessing as mp core_num = mp.cpu_count() config = tf.ConfigProto( inter_op_parallelism_threads=core_num, intra_op_parallelism_threads=core_num ) a = tf.neg(123.45) b = tf.neg([-1.2, 5.5, 700]) ss= tf.Session(config=config) print(ss.run(a)) print(ss.run(b))