Commit b7067cbd authored by Deepak Narayanan's avatar Deepak Narayanan
Browse files

Fix interleaved schedule assertion

parent 9dc111cc

megatron/arguments.py

+0 −3
Original line number Diff line number Diff line
@@ -123,9 +123,6 @@ def parse_args(extra_args_provider=None, defaults={}, 
        args.virtual_pipeline_model_parallel_size = \

            (args.num_layers // args.pipeline_model_parallel_size) // \

            args.num_layers_per_virtual_pipeline_stage

        assert args.global_batch_size % args.pipeline_model_parallel_size == 0, \

            'global batch size is not divisible by pipeline parallel size when ' \

            'using interleaved schedule'

    else:

        args.virtual_pipeline_model_parallel_size = None

megatron/training.py

+3 −0
Original line number Diff line number Diff line
@@ -339,6 +339,9 @@ def train_step(forward_step_func, data_iterator, 
    if mpu.get_pipeline_model_parallel_world_size() > 1:

        if args.virtual_pipeline_model_parallel_size is not None:

            forward_backward_func = forward_backward_pipelining_with_interleaving

            assert get_num_microbatches() % args.pipeline_model_parallel_size == 0, \

                'number of microbatches is not divisible by pipeline-parallel ' \

                'size when using interleaved schedule'

        else:

            forward_backward_func = forward_backward_pipelining_without_interleaving

    else: