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https://github.com/firestar5683/StarPilot.git
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firestar5683
22a8575199
Keep official openpilot ancestry and dependency licenses. Store resources directly in Git, remove LFS setup requirements, and leave the downloadable big model outside the source tree.
28 lines
892 B
Python
28 lines
892 B
Python
import unittest
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from tinygrad import Tensor, Device
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import time
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def time_tensor_numpy(out:Tensor):
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times = []
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for _ in range(5):
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st = time.perf_counter()
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out.uop.base.realized.as_memoryview(allow_zero_copy=True)
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et = time.perf_counter() - st
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times.append(et)
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return min(times)
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N = 4096
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class TestZeroCopy(unittest.TestCase):
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@unittest.skipIf(Device.DEFAULT not in {"CPU", "METAL"}, "device isn't zero copy")
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def test_zero_copy_from_default_to_cpu(self):
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demo = Tensor.rand(1).realize()
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t1 = time_tensor_numpy(demo)
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out = Tensor.rand(N, N).realize()
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t2 = time_tensor_numpy(out)
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gbps = out.nbytes()*1e-9/max(t2-t1, 1e-10)
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print(f"time(base): {t1*1e3:.2f} ms, time(copy): {t2*1e3:.2f} ms : copy speed {gbps:.2f} GB/s")
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self.assertGreater(gbps, 600) # more than 600 GB/s = no copy
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if __name__ == '__main__':
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unittest.main(verbosity=2)
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