# ###############################################################
# Copyright 2016-2023 Cerebras Systems
# SPDX-License-Identifier: BSD-3-Clause
#
# From original Apex:
# Copyright (c) 2011-2021, NVIDIA CORPORATION. All rights reserved.
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# are permitted provided that the following conditions are met:
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# 1. Redistributions of source code must retain the above copyright notice,
# this list of conditions and the following disclaimer.
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# 2. Redistributions in binary form must reproduce the above copyright notice,
# this list of conditions and the following disclaimer in the documentation
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# 3. Neither the name of the copyright holder nor the names of its contributors
# may be used to endorse or promote products derived from this software without
# specific prior written permission.
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# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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#################################################################
import torch
class AmpState(object):
def __init__(self):
self.hard_override = False
self.allow_incoming_model_not_fp32 = False
self.verbosity = 1
self.use_bfloat16 = False
@property
def half_dtype(self):
if self.use_bfloat16:
return torch.bfloat16
return torch.float16
# Attribute stash. Could also just stash things as global module attributes.
_amp_state = AmpState()
def warn_or_err(msg):
if _amp_state.hard_override:
print("Warning: " + msg)
else:
raise RuntimeError(msg)
def maybe_print(msg):
if _amp_state.verbosity > 0:
print(msg)
[docs]def use_bfloat16(use_bfloat16):
_amp_state.use_bfloat16 = use_bfloat16