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28 lines
599 B
28 lines
599 B
#!/usr/bin/env python3
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import os
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#os.environ['OMP_NUM_THREADS'] = '1'
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import time
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import numpy as np
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N = 512
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if __name__ == "__main__":
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# N^2
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A = np.random.randn(N, N).astype(np.float32)
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# N^2
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B = np.random.randn(N, N).astype(np.float32)
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# 2N compute in N^2 output cells
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flop = 2*N*N*N
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#print(f"{flop / 1e9:.2f} GFLOP")
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for i in range(10):
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st = time.monotonic()
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C = A @ B.T
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et = time.monotonic()
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s = et-st
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print(f"{flop/s * 1e-9:.2f} GFLOP/S, {s*1e3:.2f} ms")
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with open("/tmp/matmul", "wb") as f:
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f.write(A.data)
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f.write(B.data)
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f.write(C.data)
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