Vehicle Researcher
6adb63b915
date: 2026-06-04T09:49:56 master commit: c0ab3550eca2e9daf197c46b7e4b24aa9637cf2e
35 lines
1.1 KiB
Python
35 lines
1.1 KiB
Python
#!/usr/bin/env python3
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from tinygrad import Tensor, Device, GlobalCounters, Context, dtypes
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from tinygrad.helpers import getenv, colored
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SZ = 8_000_000_000
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GPUS = getenv("GPUS", 4) # TODO: expose a way in tinygrad to access this
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if __name__ == "__main__":
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# create tensors
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tens = [Tensor.ones(SZ, dtype=dtypes.uint8, device=f"{Device.DEFAULT}:{i}").contiguous() for i in range(GPUS)]
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Tensor.realize(*tens)
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bw = [[0.0]*GPUS for _ in range(GPUS)]
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for i in range(GPUS):
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for j in range(GPUS):
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GlobalCounters.reset()
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with Context(DEBUG=2):
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if i == j:
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# this copy would be optimized out, just add 1
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(tens[i]+1).realize()
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else:
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tens[i].to(f"{Device.DEFAULT}:{j}").realize()
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t = max(GlobalCounters.time_sum_s, 1e-9)
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bw[i][j] = SZ / t / 1e9 # GB/s
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def fmt(x):
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c = "green" if x > 50 else "yellow" if x > 20 else "red"
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return colored(f"{x:6.1f}", c)
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# header
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print(" " * 8 + " ".join(f"{'d'+str(j):>6}" for j in range(GPUS)))
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# rows
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for i in range(GPUS):
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print(f"{'s'+str(i):>6} -> " + " ".join(fmt(x) for x in bw[i]))
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