# coding=utf-8 # Copyright (c) 2021, NVIDIA CORPORATION. All rights reserved. # # Licensed under the Apache License, Version 2.0 (the "License"); # you may not use this file except in compliance with the License. # You may obtain a copy of the License at # # http://www.apache.org/licenses/LICENSE-2.0 # # Unless required by applicable law or agreed to in writing, software # distributed under the License is distributed on an "AS IS" BASIS, # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. # See the License for the specific language governing permissions and # limitations under the License. """Megatron arguments.""" import argparse import os import torch def parse_args(extra_args_provider=None, defaults={}, ignore_unknown_args=False): """Parse all arguments.""" parser = argparse.ArgumentParser(description='Megatron-LM Arguments', allow_abbrev=False) # Standard arguments. parser = _add_network_size_args(parser) parser = _add_regularization_args(parser) parser = _add_training_args(parser) parser = _add_initialization_args(parser) parser = _add_learning_rate_args(parser) parser = _add_checkpointing_args(parser) parser = _add_mixed_precision_args(parser) parser = _add_distributed_args(parser) parser = _add_validation_args(parser) parser = _add_data_args(parser) parser = _add_autoresume_args(parser) parser = _add_biencoder_args(parser) parser = _add_vision_args(parser) parser = _add_logging_args(parser) # NOTE(mkozuki): This option is added to investigate the potential of `torch.autograd.graph.save_on_cpu()`. # ref: https://pytorch.org/docs/stable/autograd.html#torch.autograd.graph.save_on_cpu. parser.add_argument('--cpu-offload', action='store_true', default=False, help='Turns on CPU offloading') # Custom arguments. if extra_args_provider is not None: parser = extra_args_provider(parser) # Parse. if ignore_unknown_args: args, _ = parser.parse_known_args() else: args = parser.parse_args() # Distributed args. args.rank = int(os.getenv('RANK', '0')) args.world_size = int(os.getenv("WORLD_SIZE", '1')) # Tensor model parallel size. args.tensor_model_parallel_size = min( args.tensor_model_parallel_size, args.world_size) assert args.world_size % args.tensor_model_parallel_size == 0, 'world size'\ ' ({}) is not divisible by tensor model parallel size ({})'.format( args.world_size, args.tensor_model_parallel_size) # Pipeline model parallel size. args.pipeline_model_parallel_size = min( args.pipeline_model_parallel_size, (args.world_size // args.tensor_model_parallel_size)) args.transformer_pipeline_model_parallel_size = ( args.pipeline_model_parallel_size - 1 if args.standalone_embedding_stage else args.pipeline_model_parallel_size ) # Checks. model_parallel_size = args.pipeline_model_parallel_size * \ args.tensor_model_parallel_size assert args.world_size % model_parallel_size == 0, 'world size is not'\ ' divisible by tensor parallel size ({}) times pipeline parallel ' \ 'size ({})'.format(args.world_size, args.tensor_model_parallel_size, args.pipeline_model_parallel_size) args.data_parallel_size = args.world_size // model_parallel_size if args.rank == 0: print('using world size: {}, data-parallel-size: {}, ' 'tensor-model-parallel size: {}, ' 'pipeline-model-parallel size: {} '.format( args.world_size, args.data_parallel_size, args.tensor_model_parallel_size, args.pipeline_model_parallel_size), flush=True) if args.pipeline_model_parallel_size > 1: if args.pipeline_model_parallel_split_rank is not None: assert args.pipeline_model_parallel_split_rank < \ args.pipeline_model_parallel_size, 'split rank needs'\ ' to be less than pipeline model parallel size ({})'.format( args.pipeline_model_parallel_size) # Deprecated arguments assert args.batch_size is None, '--batch-size argument is no longer ' \ 'valid, use --micro-batch-size instead' del args.batch_size assert args.warmup is None, '--warmup argument is no longer valid, use ' \ '--lr-warmup-fraction instead' del args.warmup assert args.model_parallel_size is None, '--model-parallel-size is no ' \ 'longer valid, use --tensor-model-parallel-size instead' del args.model_parallel_size if args.checkpoint_activations: args.recompute_granularity = 'full' args.recompute_method = 'uniform' if args.rank == 0: print('--checkpoint-activations is no longer valid, ' 'use --recompute-granularity and --recompute-method instead. ' 'Defaulting to recompute-granularity=full and recompute-method=uniform.') del args.checkpoint_activations if args.recompute_activations: args.recompute_granularity = 'selective' del args.recompute_activations # Set input defaults. for key in defaults: # For default to be valid, it should not be provided in the # arguments that are passed to the program. We check this by # ensuring the arg is set to None. if getattr(args, key) is not None: if args.rank == 0: print('WARNING: overriding default arguments for {key}:{v} \ with {key}:{v2}'.format(key=key, v=defaults[key], v2=getattr(args, key)), flush=True) else: setattr(args, key, defaults[key]) # Batch size. assert args.micro_batch_size is not None assert args.micro_batch_size > 0 if args.global_batch_size is None: args.global_batch_size = args.micro_batch_size * args.data_parallel_size if args.rank == 0: print('setting global batch size to {}'.format( args.global_batch_size), flush=True) assert args.global_batch_size > 0 if args.num_layers_per_virtual_pipeline_stage is not None: assert args.pipeline_model_parallel_size > 2, \ 'pipeline-model-parallel size should be greater than 2 with ' \ 'interleaved schedule' assert args.num_layers % args.num_layers_per_virtual_pipeline_stage == 0, \ 'number of layers is not divisible by number of layers per virtual ' \ 'pipeline stage' args.virtual_pipeline_model_parallel_size = \ (args.num_layers // args.pipeline_model_parallel_size) // \ args.num_layers_per_virtual_pipeline_stage else: args.virtual_pipeline_model_parallel_size = None # Parameters dtype. args.params_dtype = torch.float if args.fp16: assert not args.bf16 args.params_dtype = torch.half if args.bf16: assert not args.fp16 args.params_dtype = torch.bfloat16 # bfloat16 requires gradient accumulation and all-reduce to # be done in fp32. if not args.accumulate_allreduce_grads_in_fp32: args.accumulate_allreduce_grads_in_fp32 = True if args.rank == 0: print('accumulate and all-reduce gradients in fp32 for ' 'bfloat16 data type.', flush=True) if args.rank == 0: print('using {} for parameters ...'.format(args.params_dtype), flush=True) # If we do accumulation and all-reduces in fp32, we need to have local DDP # and we should make sure use-contiguous-buffers-in-local-ddp is not off. if args.accumulate_allreduce_grads_in_fp32: assert args.DDP_impl == 'local' assert args.use_contiguous_buffers_in_local_ddp else: if args.gradient_accumulation_fusion: args.gradient_accumulation_fusion = False if args.rank == 0: print('Gradient accumulation fusion to linear layer weight ' 'gradient computation is supported only with fp32 ' 'gradient accumulation. Setting gradient_accumulation_fusion ' 'to False', flush=True) # For torch DDP, we do not use contiguous buffer if args.DDP_impl == 'torch': args.use_contiguous_buffers_in_local_ddp = False if args.dataloader_type is None: args.dataloader_type = 'single' # Consumed tokens. args.consumed_train_samples = 0 args.consumed_valid_samples = 0 # Iteration-based training. if args.train_iters: # If we use iteration-based training, make sure the # sample-based options are off. assert args.train_samples is None, \ 'expected iteration-based training' assert args.lr_decay_samples is None, \ 'expected iteration-based learning rate decay' assert args.lr_warmup_samples == 0, \ 'expected iteration-based learning rate warmup' assert args.rampup_batch_size is None, \ 'expected no batch-size rampup for iteration-based training' if args.lr_warmup_fraction is not None: assert args.lr_warmup_iters == 0, \ 'can only specify one of lr-warmup-fraction and lr-warmup-iters' # Sample-based training. if args.train_samples: # If we use sample-based training, make sure the # iteration-based options are off. assert args.train_iters is None, \ 'expected sample-based training' assert args.lr_decay_iters is None, \ 'expected sample-based learning rate decay' assert args.lr_warmup_iters == 0, \ 'expected sample-based learnig rate warmup' if args.lr_warmup_fraction is not None: assert args.lr_warmup_samples == 0, \ 'can only specify one of lr-warmup-fraction ' \ 'and lr-warmup-samples' # Check required arguments. required_args = ['num_layers', 'hidden_size', 'num_attention_heads', 'max_position_embeddings'] for req_arg in required_args: _check_arg_is_not_none(args, req_arg) # Checks. if args.ffn_hidden_size is None: args.ffn_hidden_size = 4 * args.hidden_size if args.kv_channels is None: assert args.hidden_size % args.num_attention_heads == 0 args.kv_channels = args.hidden_size // args.num_attention_heads if args.seq_length is not None: assert args.encoder_seq_length is None args.encoder_seq_length = args.seq_length else: assert args.encoder_seq_length is not None args.seq_length = args.encoder_seq_length if args.seq_length is not None: assert args.max_position_embeddings >= args.seq_length if args.decoder_seq_length is not None: assert args.max_position_embeddings >= args.decoder_seq_length if args.lr is not None: assert args.min_lr <= args.lr if args.save is not None: assert args.save_interval is not None # Mixed precision checks. if args.fp16_lm_cross_entropy: assert args.fp16, 'lm cross entropy in fp16 only support in fp16 mode.' if args.fp32_residual_connection: assert args.fp16 or args.bf16, \ 'residual connection in fp32 only supported when using fp16 or bf16.' if args.weight_decay_incr_style == 'constant': assert args.start_weight_decay is None assert args.end_weight_decay is None args.start_weight_decay = args.weight_decay args.end_weight_decay = args.weight_decay else: assert args.start_weight_decay is not None assert args.end_weight_decay is not None TORCH_MAJOR = int(torch.__version__.split('.')[0]) TORCH_MINOR = int(torch.__version__.split('.')[1]) # Persistent fused layer norm. if TORCH_MAJOR < 1 or (TORCH_MAJOR == 1 and TORCH_MINOR < 11): args.no_persist_layer_norm = True if args.rank == 0: print('Persistent fused layer norm kernel is supported from ' 'pytorch v1.11 (nvidia pytorch container paired with v1.11). ' 'Defaulting to no_persist_layer_norm=True') # Activation recomputing. if args.distribute_saved_activations: assert args.tensor_model_parallel_size > 1, 'can distribute ' \ 'recomputed activations only across tensor model ' \ 'parallel groups' assert args.recompute_granularity == 'full', \ 'distributed recompute activations is only '\ 'application to full recompute granularity' assert args.recompute_method is not None, \ 'for distributed recompute activations to work you '\ 'need to use a recompute method ' assert TORCH_MAJOR >= 1 and TORCH_MINOR >= 10, \ 'distributed recompute activations are supported for pytorch ' \ 'v1.10 and above (Nvidia Pytorch container >= 21.07). Current ' \ 'pytorch version is v%s.%s.' % (TORCH_MAJOR, TORCH_MINOR) if args.recompute_granularity == 'selective': assert args.recompute_method is None, \ 'recompute method is not yet supported for ' \ 'selective recomputing granularity' # disable async_tensor_model_parallel_allreduce when # model parallel memory optimization is enabled if args.sequence_parallel: args.async_tensor_model_parallel_allreduce = False _print_args(args) return args def _print_args(args): """Print arguments.""" if args.rank == 0: print('------------------------ arguments ------------------------', flush=True) str_list = [] for arg in vars(args): dots = '.' * (48 - len(arg)) str_list.append(' {} {} {}'.format(arg, dots, getattr(args, arg))) for arg in sorted(str_list, key=lambda x: x.lower()): print(arg, flush=True) print('-------------------- end of arguments ---------------------', flush=True) def _check_arg_is_not_none(args, arg): assert getattr(args, arg) is not None, '{} argument is None'.format(arg) def _add_inference_args(parser): group = parser.add_argument_group(title='inference') group.add_argument('--inference-batch-times-seqlen-threshold', type=int, default=512, help='During inference, if batch-size times ' 'sequence-length is smaller than this threshold ' 'then we will not use pipelining, otherwise we will.') return parser def _add_network_size_args(parser): group = parser.add_argument_group(title='network size') group.add_argument('--num-layers', type=int, default=None, help='Number of transformer layers.') group.add_argument('--hidden-size', type=int, default=None, help='Tansformer hidden size.') group.add_argument('--ffn-hidden-size', type=int, default=None, help='Transformer Feed-Forward Network hidden size. ' 'This is set to 4*hidden-size if not provided') group.add_argument('--num-attention-heads', type=int, default=None, help='Number of transformer attention heads.') group.add_argument('--kv-channels', type=int, default=None, help='Projection weights dimension in multi-head ' 'attention. This is set to ' ' args.hidden_size // args.num_attention_heads ' 'if not provided.') group.add_argument('--max-position-embeddings', type=int, default=None, help='Maximum number of position embeddings to use. ' 'This is the size of position embedding.') group.add_argument('--make-vocab-size-divisible-by', type=int, default=128, help='Pad the vocab size to be divisible by this value.' 'This is added for computational efficieny reasons.') group.add_argument('--layernorm-epsilon', type=float, default=1e-5, help='Layer norm epsilon.') group.add_argument('--apply-residual-connection-post-layernorm', action='store_true', help='If set, use original BERT residula connection ' 'ordering.') group.add_argument('--openai-gelu', action='store_true', help='Use OpenAIs GeLU implementation. This option' 'should not be used unless for backward compatibility' 'reasons.') group.add_argument('--onnx-safe', type=bool, required=False, help='Use workarounds for known problems with ' 'Torch ONNX exporter') group.add_argument('--bert-no-binary-head', action='store_false', help='Disable BERT binary head.', dest='bert_binary_head') group.add_argument('--num-experts', type=int, default=None, help='Number of Experts in Switch Transformer (None means no Switch)') return parser def _add_logging_args(parser): group = parser.add_argument_group(title='logging') group.add_argument('--log-params-norm', action='store_true', help='If set, calculate and log parameters norm.') group.add_argument('--log-num-zeros-in-grad', action='store_true', help='If set, calculate and log the number of zeros in gradient.') group.add_argument('--tensorboard-log-interval', type=int, default=1, help='Report to tensorboard interval.') group.add_argument('--tensorboard-queue-size', type=int, default=1000, help='Size of the tensorboard queue for pending events ' 'and summaries before one of the ‘add’ calls forces a ' 'flush to disk.') group.add_argument('--log-timers-to-tensorboard', action='store_true', help='If set, write timers to tensorboard.') group.add_argument('--log-batch-size-to-tensorboard', action='store_true', help='If set, write batch-size to tensorboard.') group.add_argument('--no-log-learnig-rate-to-tensorboard', action='store_false', help='Disable learning rate logging to tensorboard.', dest='log_learning_rate_to_tensorboard') group.add_argument('--no-log-loss-scale-to-tensorboard', action='store_false', help='Disable loss-scale logging to tensorboard.', dest='log_loss_scale_to_tensorboard') group.add_argument('--log-validation-ppl-to-tensorboard', action='store_true', help='If set, write validation perplexity to ' 'tensorboard.') group.add_argument('--log-memory-to-tensorboard', action='store_true', help='Enable memory logging to tensorboard.') group.add_argument('--log-world-size-to-tensorboard', action='store_true', help='Enable world size logging to tensorboard.') return parser def _add_regularization_args(parser): group = parser.add_argument_group(title='regularization') group.add_argument('--attention-dropout', type=float, default=0.1, help='Post attention dropout probability.') group.add_argument('--hidden-dropout', type=float, default=0.1, help='Dropout probability for hidden state transformer.') group.add_argument('--weight-decay', type=float, default=0.01, help='Weight decay coefficient for L2 regularization.') group.add_argument('--start-weight-decay', type=float, help='Initial weight decay coefficient for L2 regularization.') group.add_argument('--end-weight-decay', type=float, help='End of run weight decay coefficient for L2 regularization.') group.add_argument('--weight-decay-incr-style', type=str, default='constant', choices=['constant', 'linear', 'cosine'], help='Weight decay increment function.') group.add_argument('--clip-grad', type=float, default=1.0, help='Gradient clipping based on global L2 norm.') group.add_argument('--adam-beta1', type=float, default=0.9, help='First coefficient for computing running averages ' 'of gradient and its square') group.add_argument('--adam-beta2', type=float, default=0.999, help='Second coefficient for computing running averages ' 'of gradient and its square') group.add_argument('--adam-eps', type=float, default=1e-08, help='Term added to the denominator to improve' 'numerical stability') group.add_argument('--sgd-momentum', type=float, default=0.9, help='Momentum factor for sgd') return parser def _add_training_args(parser): group = parser.add_argument_group(title='training') group.add_argument('--micro-batch-size', type=int, default=None, help='Batch size per model instance (local batch size). ' 'Global batch size is local batch size times data ' 'parallel size times number of micro batches.') group.add_argument('--batch-size', type=int, default=None, help='Old batch size parameter, do not use. ' 'Use --micro-batch-size instead') group.add_argument('--global-batch-size', type=int, default=None, help='Training batch size. If set, it should be a ' 'multiple of micro-batch-size times data-parallel-size. ' 'If this value is None, then ' 'use micro-batch-size * data-parallel-size as the ' 'global batch size. This choice will result in 1 for ' 'number of micro-batches.') group.add_argument('--rampup-batch-size', nargs='*', default=None, help='Batch size ramp up with the following values:' ' --rampup-batch-size ' ' ' ' ' 'For example:' ' --rampup-batch-size 16 8 300000 \ ' ' --global-batch-size 1024' 'will start with global batch size 16 and over ' ' (1024 - 16) / 8 = 126 intervals will increase' 'the batch size linearly to 1024. In each interval' 'we will use approximately 300000 / 126 = 2380 samples.') group.add_argument('--recompute-activations', action='store_true', help='recompute activation to allow for training ' 'with larger models, sequences, and batch sizes.') group.add_argument('--recompute-granularity', type=str, default=None, choices=['full', 'selective'], help='Checkpoint activations to allow for training ' 'with larger models, sequences, and batch sizes. ' 'It is supported at two granularities 1) full: ' 'whole transformer layer is recomputed, ' '2) selective: core attention part of the transformer ' 'layer is recomputed.') group.add_argument('--distribute-saved-activations', action='store_true', help='If set, distribute recomputed activations ' 'across model parallel group.') group.add_argument('--recompute-method', type=str, default=None, choices=['uniform', 'block'], help='1) uniform: uniformly divide the total number of ' 'Transformer layers and recompute the input activation of ' 'each divided chunk at specified granularity, ' '2) recompute the input activations of only a set number of ' 'individual Transformer layers per pipeline stage and do the ' 'rest without any recomputing at specified granularity' 'default) do not apply activations recompute to any layers') group.add_argument('--recompute-num-layers', type=int, default=1, help='1) uniform: the number of Transformer layers in each ' 'uniformly divided recompute unit, ' '2) block: the number of individual Transformer layers ' 'to recompute within each pipeline stage.') # deprecated group.add_argument('--checkpoint-activations', action='store_true', help='Checkpoint activation to allow for training ' 'with larger models, sequences, and batch sizes.') group.add_argument('--train-iters', type=int, default=None, help='Total number of iterations to train over all ' 'training runs. Note that either train-iters or ' 'train-samples should be provided.') group.add_argument('--train-samples', type=int, default=None, help='Total number of samples to train over all ' 'training runs. Note that either train-iters or ' 'train-samples should be provided.') group.add_argument('--log-interval', type=int, default=100, help='Report loss and timing interval.') group.add_argument('--exit-interval', type=int, default=None, help='Exit the program after the iteration is divisible ' 'by this value.') group.add_argument('--exit-duration-in-mins', type=int, default=None, help='Exit the program after this many minutes.') group.add_argument('--tensorboard-dir', type=str, default=None, help='Write TensorBoard logs to this directory.') group.add_argument('--no-masked-softmax-fusion', action='store_false', help='Disable fusion of query_key_value scaling, ' 'masking, and softmax.', dest='masked_softmax_fusion') group.add_argument('--no-bias-gelu-fusion', action='store_false', help='Disable bias and gelu fusion.', dest='bias_gelu_fusion') group.add_argument('--no-bias-dropout-fusion', action='store_false', help='Disable bias and dropout fusion.', dest='bias_dropout_fusion') group.add_argument('--optimizer', type=str, default='adam', choices=['adam', 'sgd'], help='Optimizer function') group.add_argument('--dataloader-type', type=str, default=None, choices=['single', 'cyclic'], help='Single pass vs multiple pass data loader') group.add_argument('--no-async-tensor-model-parallel-allreduce', action='store_true', help='Disable asynchronous execution of ' 'tensor-model-parallel all-reduce with weight ' 'gradient compuation of a column-linear layer.', dest='async_tensor_model_parallel_allreduce') group.add_argument('--no-persist-layer-norm', action='store_true', help='Disable using persistent fused layer norm kernel. ' 'This kernel supports only a set of hidden sizes. Please ' 'check persist_ln_hidden_sizes if your hidden ' 'size is supported.') group.add_argument('--sequence-parallel', action='store_true', help='Enable sequence parallel optimization.') group.add_argument('--no-gradient-accumulation-fusion', action='store_false', help='Disable fusing gradient accumulation to weight ' 'gradient computation of linear layers', dest='gradient_accumulation_fusion') return parser def _add_initialization_args(parser): group = parser.add_argument_group(title='initialization') group.add_argument('--seed', type=int, default=1234, help='Random seed used for python, numpy, ' 'pytorch, and cuda.') group.add_argument('--init-method-std', type=float, default=0.02, help='Standard deviation of the zero mean normal ' 'distribution used for weight initialization.') group.add_argument('--init-method-xavier-uniform', action='store_true', help='Enable Xavier uniform parameter initialization') return parser def _add_learning_rate_args(parser): group = parser.add_argument_group(title='learning rate') group.add_argument('--lr', type=float, default=None, help='Initial learning rate. Depending on decay style ' 'and initial warmup, the learing rate at each ' 'iteration would be different.') group.add_argument('--lr-decay-style', type=str, default='linear', choices=['constant', 'linear', 'cosine'], help='Learning rate decay function.') group.add_argument('--lr-decay-iters', type=int, default=None, help='number of iterations to decay learning rate over,' ' If None defaults to `--train-iters`') group.add_argument('--lr-decay-samples', type=int, default=None, help='number of samples to decay learning rate over,' ' If None defaults to `--train-samples`') group.add_argument('--lr-warmup-fraction', type=float, default=None, help='fraction of lr-warmup-(iters/samples) to use ' 'for warmup (as a float)') group.add_argument('--lr-warmup-iters', type=int, default=0, help='number of iterations to linearly warmup ' 'learning rate over.') group.add_argument('--lr-warmup-samples', type=int, default=0, help='number of samples to linearly warmup ' 'learning rate over.') group.add_argument('--warmup', type=int, default=None, help='Old lr warmup argument, do not use. Use one of the' '--lr-warmup-* arguments above') group.add_argument('--min-lr', type=float, default=0.0, help='Minumum value for learning rate. The scheduler' 'clip values below this threshold.') group.add_argument('--override-lr-scheduler', action='store_true', help='Reset the values of the scheduler (learning rate,' 'warmup iterations, minimum learning rate, maximum ' 'number of iterations, and decay style from input ' 'arguments and ignore values from checkpoints. Note' 'that all the above values will be reset.') group.add_argument('--use-checkpoint-lr-scheduler', action='store_true', help='Use checkpoint to set the values of the scheduler ' '(learning rate, warmup iterations, minimum learning ' 'rate, maximum number of iterations, and decay style ' 'from checkpoint and ignore input arguments.') return parser def _add_checkpointing_args(parser): group = parser.add_argument_group(title='checkpointing') group.add_argument('--save', type=str, default=None, help='Output directory to save checkpoints to.') group.add_argument('--save-interval', type=int, default=None, help='Number of iterations between checkpoint saves.') group.add_argument('--no-save-optim', action='store_true', default=None, help='Do not save current optimizer.') group.add_argument('--no-save-rng', action='store_true', default=None, help='Do not save current rng state.') group.add_argument('--load', type=str, default=None, help='Directory containing a model checkpoint.') group.add_argument('--no-load-optim', action='store_true', default=None, help='Do not load optimizer when loading checkpoint.') group.add_argument('--no-load-rng', action='store_true', default=None, help='Do not load rng state when loading checkpoint.') group.add_argument('--finetune', action='store_true', help='Load model for finetuning. Do not load optimizer ' 'or rng state from checkpoint and set iteration to 0. ' 'Assumed when loading a release checkpoint.') return parser def _add_mixed_precision_args(parser): group = parser.add_argument_group(title='mixed precision') group.add_argument('--fp16', action='store_true', help='Run model in fp16 mode.') group.add_argument('--bf16', action='store_true', help='Run model in bfloat16 mode.') group.add_argument('--loss-scale', type=float, default=None, help='Static loss scaling, positive power of 2 ' 'values can improve fp16 convergence. If None, dynamic' 'loss scaling is used.') group.add_argument('--initial-loss-scale', type=float, default=2**32, help='Initial loss-scale for dynamic loss scaling.') group.add_argument('--min-loss-scale', type=float, default=1.0, help='Minimum loss scale for dynamic loss scale.') group.add_argument('--loss-scale-window', type=float, default=1000, help='Window over which to raise/lower dynamic scale.') group.add_argument('--hysteresis', type=int, default=2, help='hysteresis for dynamic loss scaling') group.add_argument('--fp32-residual-connection', action='store_true', help='Move residual connections to fp32.') group.add_argument('--no-query-key-layer-scaling', action='store_false', help='Do not scale Q * K^T by 1 / layer-number.', dest='apply_query_key_layer_scaling') group.add_argument('--attention-softmax-in-fp32', action='store_true', help='Run attention masking and softmax in fp32. ' 'This flag is ignored unless ' '--no-query-key-layer-scaling is specified.') group.add_argument('--accumulate-allreduce-grads-in-fp32', action='store_true', help='Gradient accumulation and all-reduce in fp32.') group.add_argument('--fp16-lm-cross-entropy', action='store_true', help='Move the cross entropy unreduced loss calculation' 'for lm head to fp16.') return parser def _add_distributed_args(parser): group = parser.add_argument_group(title='distributed') group.add_argument('--tensor-model-parallel-size', type=int, default=1, help='Degree of tensor model parallelism.') group.add_argument('--pipeline-model-parallel-size', type=int, default=1, help='Degree of pipeline model parallelism.') group.add_argument('--pipeline-model-parallel-split-rank', type=int, default=None, help='Rank where encoder and decoder should be split.') group.add_argument('--model-parallel-size', type=int, default=None, help='Old model parallel argument, do not use. Use ' '--tensor-model-parallel-size instead.') group.add_argument('--num-layers-per-virtual-pipeline-stage', type=int, default=None, help='Number of layers per virtual pipeline stage') group.add_argument('--distributed-backend', default='nccl', choices=['nccl', 'gloo'], help='Which backend to use for distributed training.') group.add_argument('--DDP-impl', default='local', choices=['local', 'torch'], help='which DistributedDataParallel implementation ' 'to use.') group.add_argument('--no-contiguous-buffers-in-local-ddp', action='store_false', help='If set, dont use ' 'contiguous buffer in local DDP.', dest='use_contiguous_buffers_in_local_ddp') group.add_argument('--no-scatter-gather-tensors-in-pipeline', action='store_false', help='Use scatter/gather to optimize communication of tensors in pipeline', dest='scatter_gather_tensors_in_pipeline') group.add_argument('--local_rank', type=int, default=None, help='local rank passed from distributed launcher.') group.add_argument('--lazy-mpu-init', type=bool, required=False, help='If set to True, initialize_megatron() ' 'skips DDP initialization and returns function to ' 'complete it instead.Also turns on ' '--use-cpu-initialization flag. This is for ' 'external DDP manager.' ) group.add_argument('--use-cpu-initialization', action='store_true', default=None, help='If set, affine parallel weights ' 'initialization uses CPU' ) group.add_argument('--empty-unused-memory-level', default=0, type=int, choices=[0, 1, 2], help='Call torch.cuda.empty_cache() each iteration ' '(training and eval), to reduce fragmentation.' '0=off, 1=moderate, 2=aggressive.') group.add_argument('--standalone-embedding-stage', action='store_true', default=False, help='If set, *input* embedding layer ' 'is placed on its own pipeline stage, without any ' 'transformer layers. (For T5, this flag currently only ' 'affects the encoder embedding.)') return parser def _add_validation_args(parser): group = parser.add_argument_group(title='validation') group.add_argument('--eval-iters', type=int, default=100, help='Number of iterations to run for evaluation' 'validation/test for.') group.add_argument('--eval-interval', type=int, default=1000, help='Interval between running evaluation on ' 'validation set.') return parser def _add_data_args(parser): group = parser.add_argument_group(title='data and dataloader') group.add_argument('--data-path', nargs='*', default=None, help='Path to the training dataset. Accepted format:' '1) a single data path, 2) multiple datasets in the' 'form: dataset1-weight dataset1-path dataset2-weight ' 'dataset2-path ...') group.add_argument('--split', type=str, default='969, 30, 1', help='Comma-separated list of proportions for training,' ' validation, and test split. For example the split ' '`90,5,5` will use 90%% of data for training, 5%% for ' 'validation and 5%% for test.') group.add_argument('--vocab-file', type=str, default=None, help='Path to the vocab file.') group.add_argument('--merge-file', type=str, default=None, help='Path to the BPE merge file.') group.add_argument('--vocab-extra-ids', type=int, default=0, help='Number of additional vocabulary tokens. ' 'They are used for span masking in the T5 model') group.add_argument('--seq-length', type=int, default=None, help='Maximum sequence length to process.') group.add_argument('--encoder-seq-length', type=int, default=None, help='Maximum encoder sequence length to process.' 'This should be exclusive of --seq-length') group.add_argument('--decoder-seq-length', type=int, default=None, help="Maximum decoder sequence length to process.") group.add_argument('--retriever-seq-length', type=int, default=256, help='Maximum sequence length for the biencoder model ' ' for retriever') group.add_argument('--sample-rate', type=float, default=1.0, help='sample rate for training data. Supposed to be 0 ' ' < sample_rate < 1') group.add_argument('--mask-prob', type=float, default=0.15, help='Probability of replacing a token with mask.') group.add_argument('--short-seq-prob', type=float, default=0.1, help='Probability of producing a short sequence.') group.add_argument('--mmap-warmup', action='store_true', help='Warm up mmap files.') group.add_argument('--num-workers', type=int, default=2, help="Dataloader number of workers.") group.add_argument('--tokenizer-type', type=str, default=None, choices=['BertWordPieceLowerCase', 'BertWordPieceCase', 'GPT2BPETokenizer'], help='What type of tokenizer to use.') group.add_argument('--data-impl', type=str, default='infer', choices=['lazy', 'cached', 'mmap', 'infer'], help='Implementation of indexed datasets.') group.add_argument('--reset-position-ids', action='store_true', help='Reset posistion ids after end-of-document token.') group.add_argument('--reset-attention-mask', action='store_true', help='Reset self attention maske after ' 'end-of-document token.') group.add_argument('--eod-mask-loss', action='store_true', help='Mask loss for the end of document tokens.') return parser def _add_autoresume_args(parser): group = parser.add_argument_group(title='autoresume') group.add_argument('--adlr-autoresume', action='store_true', help='Enable autoresume on adlr cluster.') group.add_argument('--adlr-autoresume-interval', type=int, default=1000, help='Intervals over which check for autoresume' 'termination signal') return parser def _add_biencoder_args(parser): group = parser.add_argument_group(title='biencoder') # network size group.add_argument('--ict-head-size', type=int, default=None, help='Size of block embeddings to be used in ICT and ' 'REALM (paper default: 128)') group.add_argument('--biencoder-projection-dim', type=int, default=0, help='Size of projection head used in biencoder (paper' ' default: 128)') group.add_argument('--biencoder-shared-query-context-model', action='store_true', help='Whether to share the parameters of the query ' 'and context models or not') # checkpointing group.add_argument('--ict-load', type=str, default=None, help='Directory containing an ICTBertModel checkpoint') group.add_argument('--bert-load', type=str, default=None, help='Directory containing an BertModel checkpoint ' '(needed to start ICT and REALM)') # data group.add_argument('--titles-data-path', type=str, default=None, help='Path to titles dataset used for ICT') group.add_argument('--query-in-block-prob', type=float, default=0.1, help='Probability of keeping query in block for ' 'ICT dataset') group.add_argument('--use-one-sent-docs', action='store_true', help='Whether to use one sentence documents in ICT') group.add_argument('--evidence-data-path', type=str, default=None, help='Path to Wikipedia Evidence frm DPR paper') # training group.add_argument('--retriever-report-topk-accuracies', nargs='+', type=int, default=[], help="Which top-k accuracies to report " "(e.g. '1 5 20')") group.add_argument('--retriever-score-scaling', action='store_true', help='Whether to scale retriever scores by inverse ' 'square root of hidden size') # faiss index group.add_argument('--block-data-path', type=str, default=None, help='Where to save/load BlockData to/from') group.add_argument('--embedding-path', type=str, default=None, help='Where to save/load Open-Retrieval Embedding' ' data to/from') # indexer group.add_argument('--indexer-batch-size', type=int, default=128, help='How large of batches to use when doing indexing ' 'jobs') group.add_argument('--indexer-log-interval', type=int, default=1000, help='After how many batches should the indexer ' 'report progress') return parser def _add_vision_args(parser): group = parser.add_argument_group(title="vision") # general vision arguments group.add_argument('--num-classes', type=int, default=1000, help='num of classes in vision classificaiton task') group.add_argument('--img-h', type=int, default=224, help='Image height for vision classification task') group.add_argument('--img-w', type=int, default=224, help='Image height for vision classification task') group.add_argument('--num-channels', type=int, default=3, help='Number of channels in input image data') group.add_argument('--patch-dim', type=int, default=16, help='patch dimension') group.add_argument('--classes-fraction', type=float, default=1.0, help='training with fraction of classes.') group.add_argument('--data-per-class-fraction', type=float, default=1.0, help='training with fraction of data per class.') group.add_argument('--no-data-sharding', action='store_false', help='Disable data sharding.', dest='data_sharding') group.add_argument('--head-lr-mult', type=float, default=1.0, help='learning rate multiplier for head during finetuning') # pretraining type and backbone selection` group.add_argument('--vision-pretraining', action='store_true', help='flag to indicate vision pretraining') group.add_argument('--vision-pretraining-type', type=str, default='classify', choices=['classify', 'inpaint', 'dino'], help='pretraining objectives') group.add_argument('--vision-backbone-type', type=str, default='vit', choices=['vit', 'mit', 'swin'], help='backbone types types') group.add_argument('--swin-backbone-type', type=str, default='tiny', choices=['tiny', 'base', 'h3'], help='pretraining objectives') # inpainting arguments group.add_argument('--mask-type', type=str, default='random', choices=['random', 'row'], help='mask types') group.add_argument('--mask-factor', type=float, default=1.0, help='mask size scaling parameter') # dino arguments group.add_argument('--iter-per-epoch', type=int, default=1250, help='iterations per epoch') group.add_argument('--dino-local-img-size', type=int, default=96, help='Image size for vision classification task') group.add_argument('--dino-local-crops-number', type=int, default=10, help='Number of local crops') group.add_argument('--dino-head-hidden-size', type=int, default=2048, help='Hidden dimension size in dino head') group.add_argument('--dino-bottleneck-size', type=int, default=256, help='Bottle neck dimension in dino head ') group.add_argument('--dino-freeze-last-layer', type=float, default=1, help='Freezing last layer weights') group.add_argument('--dino-norm-last-layer', action='store_true', help='Disable Norm in last layer.') group.add_argument('--dino-warmup-teacher-temp', type=float, default=0.04, help='warump teacher temperature') group.add_argument('--dino-teacher-temp', type=float, default=0.07, help='teacher temperature') group.add_argument('--dino-warmup-teacher-temp-epochs', type=int, default=30, help='warmup teacher temperaure epochs') return parser