[Dy2stat]support pure fp16 for dy2stat #36944
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added 8 commits
November 2, 2021 12:49
Aurelius84
reviewed
Nov 11, 2021
| @@ -118,6 +118,17 @@ def _in_amp_guard(): | |||
| return False | |||
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| def _in_pure_fp16_guard(): | |||
| tracer = _dygraph_tracer() | |||
| if tracer: | |||
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| if tracer: | |
| return tracer and tracer._amp_level == core.AmpLevel.O2 |
Aurelius84
previously approved these changes
Nov 22, 2021
| """ | ||
| Tests model decorated by `dygraph_to_static_output` in static mode. For users, the model is defined in dygraph mode and trained in static mode. | ||
| """ | ||
| with fluid.dygraph.guard(place): |
| dygraph_loss = self.train(to_static=False) | ||
| self.assertTrue( | ||
| np.allclose(static_loss, dygraph_loss), | ||
| msg="static_loss: {} \n dygraph_loss: {}".format(static_loss, |
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确保CI稳定没有问题，若放开tol，需要加NOTE
Zjq9409
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to Zjq9409/Paddle
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Dec 10, 2021
* run dy2stat pure fp16 in Linear model * no use self._pure_fp16_inputs * add test and fix Adam error in dy2stat pure fp16 training * use paddle.optimizer.Adam * run test in gpu * change test time for CI * enlarge atol for test_resnet_pure_fp16 * refine code and enlarge atol * make custom_white_list and custom_black_list take effect for AMP and pure fp16 * check tracer is not None * use default atol * change filter_size * change atol and add some NOTE
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Describe
本PR在
CastPureFp16Inputs函数中加入了特判逻辑：对于动转静中所调用的run_program op直接跳过，不再进行后续的cast操作。因为run_program op只有FP32 kernel，且我们在动转静pure fp16训练时在调用run_program op时已经将run_program op的输入cast为fp16类型，所以在CastPureFp16Inputs应该跳过对于run_program op的处理，避免将其输入再cast回fp32类型。1e-3，以确保单测通过。对于动转静pure fp16训练，已经在mnist和resnet网络上测试了网络的收敛性， 均可以正常收敛。paddle.amp.auto_cast接口中黑白名单(custom_white_list参数和custom_black_list参数)的设置。在此PR之前在动转静AMP训练中设置这两个参数并不会生效。