nemo-ux cudagraph

[akoumpa]

What does this PR do ?

Adds support for cudagraph in NeMo2.0.

Example config:

gpt_config = llm.GPTConfig(
num_layers=1,
hidden_size=128,
ffn_hidden_size=256,
num_attention_heads=1,
seq_length=seq_length,
init_method_std=0.023,
hidden_dropout=0.0,
attention_dropout=0.0,
layernorm_epsilon=1e-5,
make_vocab_size_divisible_by=128,
normalization='RMSNorm',
masked_softmax_fusion=False,
# Cudagraph options
enable_cuda_graph=True,
use_te_rng_tracker=True,
gradient_accumulation_fusion=False, # This should be false with cudagraphs
)

Collection: [Note which collection this PR will affect]

Changelog

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Usage

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# Add a code snippet demonstrating how to use this 

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