ExponentialParamScheduler¶
- class mmengine.optim.ExponentialParamScheduler(optimizer, param_name, gamma, begin=0, end=1000000000, last_step=-1, by_epoch=True, verbose=False)[source]¶
Decays the parameter value of each parameter group by gamma every epoch.
- Parameters:
optimizer (Optimizer or BaseOptimWrapper) – optimizer or Wrapped optimizer.
param_name (str) – Name of the parameter to be adjusted, such as
lr
,momentum
.gamma (float) – Multiplicative factor of parameter value decay.
begin (int) – Step at which to start updating the parameters. Defaults to 0.
end (int) – Step at which to stop updating the parameters. Defaults to INF.
last_step (int) – The index of last step. Used for resume without state dict. Defaults to -1.
by_epoch (bool) – Whether the scheduled parameters are updated by epochs. Defaults to True.
verbose (bool) – Whether to print the value for each update. Defaults to False.