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[ZeRO-3] Partitioned init with deepspeed.zero.Init() #1190

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merged 3 commits into from
Mar 19, 2024
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[ZeRO-3] Partitioned init with deepspeed.zero.Init() #1190

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810ca63
added ds zero.Init() to get_model
R0n12 Mar 18, 2024
ea455dc
Clean up conditional with block
Quentin-Anthony Mar 18, 2024
f6aae75
pre-commit
Quentin-Anthony Mar 18, 2024
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17 changes: 10 additions & 7 deletions megatron/training.py
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Original file line number Diff line number Diff line change
Expand Up @@ -24,6 +24,7 @@

import math
import sys
from contextlib import nullcontext

import torch
import deepspeed
Expand Down Expand Up @@ -426,13 +427,15 @@ def get_model(neox_args, use_cache=False):
# If mup isn't being used anyways, this has no effect.
old_use_mup = neox_args.use_mup
neox_args.use_mup = False
model = GPT2ModelPipe(
neox_args=neox_args,
num_tokentypes=0,
parallel_output=True,
topology=mpu.get_topology(),
use_cache=use_cache,
)

with deepspeed.zero.Init() if neox_args.zero_stage == 3 else nullcontext() as gs:
model = GPT2ModelPipe(
neox_args=neox_args,
num_tokentypes=0,
parallel_output=True,
topology=mpu.get_topology(),
use_cache=use_cache,
)

### soft prompt tuning stuff ###
if neox_args.soft_prompt_tuning is not None and neox_args.soft_prompt_tuning.get(
Expand Down
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