IterTimerHook¶ class mmengine.hooks.IterTimerHook[source]¶ A hook that logs the time spent during iteration. E.g. data_time for loading data and time for a model train step. before_train(runner)[source]¶ Synchronize the number of iterations with the runner after resuming from checkpoints. Parameters runner – The runner of the training, validation or testing process. Return type None