MultiStepMomentum

class mmengine.optim.MultiStepMomentum(optimizer, *args, **kwargs)

Decays the specified momentum in each parameter group by gamma once the number of epoch reaches one of the milestones. Notice that such decay can happen simultaneously with other changes to the momentum from outside this scheduler.

参数:

• optimizer (Optimizer or OptimWrapper) – optimizer or Wrapped optimizer.

• milestones (list) – List of epoch indices. Must be increasing.

• gamma (float) – Multiplicative factor of momentum value decay. Defaults to 0.1.

• begin (int) – Step at which to start updating the momentum. Defaults to 0.

• end (int) – Step at which to stop updating the momentum. 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 momentum is updated by epochs. Defaults to True.

• verbose (bool) – Whether to print the momentum for each update. Defaults to False.