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pytorch-image-models/timm/utils/clip_grad.py

24 lines
796 B

import torch
from timm.utils.agc import adaptive_clip_grad
def dispatch_clip_grad(parameters, value: float, mode: str = 'norm', norm_type: float = 2.0):
""" Dispatch to gradient clipping method
Args:
parameters (Iterable): model parameters to clip
value (float): clipping value/factor/norm, mode dependant
mode (str): clipping mode, one of 'norm', 'value', 'agc'
norm_type (float): p-norm, default 2.0
"""
if mode == 'norm':
torch.nn.utils.clip_grad_norm_(parameters, value, norm_type=norm_type)
elif mode == 'value':
torch.nn.utils.clip_grad_value_(parameters, value)
elif mode == 'agc':
adaptive_clip_grad(parameters, value, norm_type=norm_type)
else:
assert False, f"Unknown clip mode ({mode})."