Adding unit test for mcore RETRO model

tests/collections/nlp/test_retro_model.py

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+# Copyright (c) 2022, 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.
+
+import json
+
+import pytest
+import torch
+from omegaconf import DictConfig
+from pytorch_lightning import Trainer
+
+from nemo.collections.nlp.models.language_modeling.megatron_retro_model import MegatronRetroModel
+from nemo.collections.nlp.modules.common.megatron.utils import get_ltor_masks_and_position_ids
+from nemo.collections.nlp.parts.nlp_overrides import NLPDDPStrategy
+
+DEVICE_CAPABILITY = None
+if torch.cuda.is_available():
+    DEVICE_CAPABILITY = torch.cuda.get_device_capability()
+
+
+@pytest.fixture()
+def retro_workdir_path(test_data_dir):
+
+    config_file = {
+        "retro_bert_tokenizer_type": "BertWordPieceLowerCase",
+        "retro_bert_vocab_file": "",
+        "retro_block_size": 1000,
+        "retro_gpt_chunk_length": 64,
+        "retro_gpt_data_cache_path": None,
+        "retro_gpt_data_path": "",
+        "retro_gpt_eval_interval": 2000,
+        "retro_gpt_eval_iters": 100,
+        "retro_gpt_global_batch_size": 8,
+        "retro_gpt_merge_file": None,
+        "retro_gpt_seed": 1234,
+        "retro_gpt_seq_length": 2048,
+        "retro_gpt_split": "98,2,0",
+        "retro_gpt_tokenizer_model": "spm_tok_ende_4k/tokenizer.model",
+        "retro_gpt_tokenizer_type": "GPTSentencePieceTokenizer",
+        "retro_gpt_train_samples": 5000,
+        "retro_gpt_valid_samples": 5000,
+        "retro_gpt_vocab_file": None,
+        "retro_neighbor_dirs": {"test": None, "train": None, "valid": None},
+    }
+
+    # save config to json file in retro_workdir_path
+    retro_workdir_path = test_data_dir + "/nlp"
+    config_file_path = retro_workdir_path + "/config.json"
+    out_file = open(config_file_path, 'w')
+    json.dump(config_file, out_file)
+    out_file.close()
+
+    return retro_workdir_path
+
+
+@pytest.fixture()
+def model_cfg(test_data_dir, retro_workdir_path):
+
+    # set model configs
+    model_cfg = {
+        'mcore_gpt': True,
+        'precision': '16',
+        'micro_batch_size': 4,
+        'global_batch_size': 8,
+        'tensor_model_parallel_size': 1,
+        'pipeline_model_parallel_size': 1,
+        'resume_from_checkpoint': None,
+        'encoder_seq_length': 2048,
+        'max_position_embeddings': 2048,
+        'num_layers': 12,
+        'hidden_size': 768,
+        'ffn_hidden_size': 3072,
+        'num_attention_heads': 12,
+        'init_method_std': 0.023,
+        'hidden_dropout': 0.1,
+        'kv_channels': 64,
+        # 'apply_query_key_layer_scaling': False,
+        'apply_query_key_layer_scaling': True,
+        'layernorm_epsilon': 1e-5,
+        'make_vocab_size_divisible_by': 128,
+        'pre_process': True,
+        'post_process': True,
+        'persist_layer_norm': True,
+        'bias': True,
+        'activation': 'gelu',
+        'transformer_block_type': 'pre_ln',
+        'retro': {
+            # 'retro_project_dir': os.path.join('tests/.data/test_data/nlp/retro_workdir_dummy'),
+            # 'retro_project_dir': os.path.join(test_data_dir, 'nlp/retro_workdir_dummy'),
+            # 'retro_project_dir': '/lustre/fsw/coreai_dlalgo_genai/huvu/data/retro/pretrain_data/micro-wiki-core-unittest',
+            'retro_project_dir': retro_workdir_path,
+            'retro_encoder_num_layers': 2,
+            'retro_encoder_hidden_dropout': 0.1,
+            'retro_encoder_attention_dropout': 0.1,
+            'retro_num_neighbors': 2,
+            'retro_num_retrieved_chunks': 2,
+            'retro_verify_neighbor_count': True,
+        },
+        'tokenizer': {
+            'library': 'megatron',
+            'type': None,
+            'model': None,
+            'vocab_file': None,
+            'merge_file': None,
+            'delimiter': None,
+            'sentencepiece_legacy': False,
+        },
+        'native_amp_init_scale': 4294967296,
+        'native_amp_growth_interval': 1000,
+        'hysteresis': 2,
+        'fp32_residual_connection': False,
+        'fp16_lm_cross_entropy': False,
+        'megatron_amp_O2': True,
+        'seed': 1234,
+        'use_cpu_initialization': False,
+        'onnx_safe': False,
+        'apex_transformer_log_level': 30,
+        'activations_checkpoint_method': None,
+        'activations_checkpoint_num_layers': None,
+        'data': {
+            'data_prefix': 'None',
+            'index_mapping_dir': None,
+            'data_impl': 'mmap',
+            'splits_string': '98,2,0',
+            'seq_length': 2048,
+            'skip_warmup': True,
+            'num_workers': 2,
+            'dataloader_type': 'single',
+            'reset_position_ids': False,
+            'reset_attention_mask': False,
+            'eod_mask_loss': False,
+            'shuffle_documents': False,
+            'retro_data': {
+                'retro_block_size': 10000,
+                'retro_chunk_length': 64,
+                'retro_split_preprocessing': "98,2,0",
+                'retro_neighbor_dirs': None,
+            },
+        },
+        'optim': {
+            'name': 'distributed_fused_adam',
+            'lr': 6.0e-4,
+            'weight_decay': 0.1,
+            'betas': [0.9, 0.95],
+            'sched': {'name': 'CosineAnnealing', 'warmup_steps': None, 'constant_steps': None, 'min_lr': '6.0e-5'},
+        },
+    }
+    return model_cfg
+
+
+@pytest.fixture()
+def trainer_cfg():
+
+    trainer_cfg = {
+        'devices': 1,
+        'num_nodes': 1,
+        'accelerator': 'gpu',
+        'precision': '16',
+        'logger': False,
+        'enable_checkpointing': False,
+        'use_distributed_sampler': False,
+        'max_epochs': -1,
+        'max_steps': 750000,
+        'log_every_n_steps': 10,
+        'val_check_interval': 100,
+        'limit_val_batches': 50,
+        'limit_test_batches': 500,
+        'accumulate_grad_batches': 1,
+        'gradient_clip_val': 1.0,
+    }
+
+    return trainer_cfg
+
+
+@pytest.fixture()
+def retro_model(model_cfg, trainer_cfg):
+
+    strategy = NLPDDPStrategy()
+
+    trainer = Trainer(strategy=strategy, **trainer_cfg)
+
+    cfg = DictConfig(model_cfg)
+
+    model = MegatronRetroModel(cfg=cfg, trainer=trainer)
+
+    return model
+
+
+@pytest.mark.run_only_on('GPU')
+class TestRETROModel:
+    @pytest.mark.unit
+    def test_constructor(self, retro_model):
+        assert isinstance(retro_model, MegatronRetroModel)
+
+        num_weights = retro_model.num_weights
+        # assert num_weights == 306868224 # using "tokenizer/mt_nlg_plus_multilingual_ja_zh_the_stack_frac_015_256k.model" tokenizer
+        assert num_weights == 113405952  # using "spm_tok_ende_4k/tokenizer.model" tokenizer
+
+    @pytest.mark.unit
+    def test_forward(self, retro_model):
+
+        # create dummy input
+        batch_size = 4
+        neighbors = 2
+        seq_length = 2048
+        chunk_length = 64
+        num_chunks = seq_length // chunk_length
+        retrieved_chunk_size = chunk_length * 2
+        vocab_size = 2000
+        eos_id = vocab_size - 2
+
+        # set input for forward
+        all_tokens = torch.randint(0, vocab_size, (batch_size, seq_length + 1)).cuda()
+        tokens = all_tokens[:, :-1]
+        labels = all_tokens[:, 1:]
+        attention_mask, _, text_position_ids = get_ltor_masks_and_position_ids(tokens, eos_id, False, False, False)
+        context_input_ids = torch.randint(
+            0, vocab_size, (batch_size * num_chunks * neighbors, retrieved_chunk_size)
+        ).cuda()
+        _, _, context_position_ids = get_ltor_masks_and_position_ids(  # neighbor_tokens is already a 2D array
+            context_input_ids, eos_id, False, False, False
+        )
+        context_mask = None
+
+        # set model to eval mode
+        retro_model.eval()
+
+        # forward step
+        with torch.no_grad():
+            out = retro_model(
+                tokens=tokens.cuda(),
+                text_position_ids=text_position_ids.cuda(),
+                attention_mask=attention_mask.cuda(),
+                labels=labels.cuda(),
+                context_input_ids=context_input_ids.cuda(),
+                context_position_ids=context_position_ids.cuda(),
+                context_mask=context_mask,
+            )
+
+        assert out.shape == torch.Size([batch_size, seq_length])