add mixed precision support to deepxde #1650
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lululxvi
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lululxvi
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If I use the API here to set mixed precision, then all the demo code can run in mixed precision? |
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Not all. The L-BFGS optimizer doesn't work in mixed precision. But if you add the line |
lululxvi
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Jun 26, 2024
| @@ -74,7 +74,7 @@ def set_default_float(value): | |||
| The default floating point type is 'float32'. | |||
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| Args: | |||
| value (String): 'float16', 'float32', or 'float64'. | |||
| value (String): 'float16', 'float32', 'float64', or 'mixed' (mixed precision in https://arxiv.org/abs/2401.16645). | |||
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value (String): 'float16', 'float32', 'float64', or 'mixed' (mixed precision).
lululxvi
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| @@ -74,7 +74,7 @@ def set_default_float(value): | |||
| The default floating point type is 'float32'. | |||
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The default floating point type is 'float32'. Mixed precision uses the method in the paper: `J. Hayford, J. Goldman-Wetzler, E. Wang, & L. Lu. Speeding up and reducing memory usage for scientific machine learning via mixed precision. Computer Methods in Applied Mechanics and Engineering, 428, 117093, 2024 <https://doi.org/10.1016/j.cma.2024.117093>`_.
lululxvi
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| self.opt.step(closure) | ||
| def closure_mixed(): |
lululxvi
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| @@ -85,6 +85,20 @@ def set_default_float(value): | |||
| elif value == "float64": | |||
| print("Set the default float type to float64") | |||
| real.set_float64() | |||
| elif value == "mixed": | |||
| print("Set the float type to mixed precision of float16 and float32") | |||
| real.set_mixed() | |||
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This code is confusing. Here you do real.set_mixed(), but later you do either real.set_float16() or real.set_float32(). It seems you only need a flag mixed. You can do this flag after line 42.
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