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# Copyright (c) 2024 NVIDIA CORPORATION & AFFILIATES. All rights reserved.
# Copyright (c) 2024 Arc Institute. All rights reserved.
# Copyright (c) 2024 Michael Poli. All rights reserved.
# Copyright (c) 2024 Stanford University. 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 torch
from nemo.collections.llm.gpt.model.base import GPTConfig
from nemo.lightning.pytorch.callbacks.flops_callback import FLOPsMeasurementCallback
class MockDataModule:
def __init__(self, global_batch_size, vocab_size):
self.global_batch_size = global_batch_size
self.tokenizer = self
self.vocab_size = vocab_size
def test_flops_measurement_callback_bert():
model_config = GPTConfig(
seq_length=128,
hidden_size=768,
num_layers=12,
ffn_hidden_size=3072,
num_attention_heads=12,
moe_router_topk=0,
num_query_groups=12,
)
train_step_time = 1.23
global_batch_size = 1
num_devices = torch.distributed.get_world_size() if torch.distributed.is_initialized() else 1
model_name = "bert"
data_module = MockDataModule(global_batch_size=global_batch_size, vocab_size=100)
callback = FLOPsMeasurementCallback(model_config, data_module, model_name)
total_flops, flops_per_gpu = callback.eval_model_flops()
expected_total_flops = 84146651135.99998
expected_flops_per_gpu = expected_total_flops / num_devices
assert total_flops == expected_total_flops
assert flops_per_gpu == expected_flops_per_gpu
tflops_per_sec_per_gpu = callback.eval_tflops_per_sec_per_gpu(train_step_time)
expected_tflops_per_sec_per_gpu = expected_flops_per_gpu / (1e12 * train_step_time)
assert tflops_per_sec_per_gpu[0] == expected_tflops_per_sec_per_gpu
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