Training with DeepSpeed takes more GPU memory than without DeepSpeed
Author: oriyor
Pull request: no
Labels: name: DeepSpeed

## Environment info
<!-- You can run the command `transformers-cli env` and copy-and-paste its output below.
     Don't forget to fill out the missing fields in that output! -->

- `transformers` version: 4.5.0.dev0
- deepspeed version: 0.3.13
- Platform: Linux-4.15.0-66-generic-x86_64-with-Ubuntu-18.04-bionic
- Python version: 3.6.8
- PyTorch version (GPU?): 1.8.0 (True)
- Tensorflow version (GPU?): not installed (NA)
- Using GPU in script?: yes
- Using distributed or parallel set-up in script?: no

### Who can help
 @stas00

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Models:

- albert, bert, xlm: @LysandreJik
- blenderbot, bart, marian, pegasus, encoderdecoder,  t5: @patrickvonplaten, @patil-suraj
- longformer, reformer, transfoxl, xlnet: @patrickvonplaten
- fsmt: @stas00
- funnel: @sgugger
- gpt2: @patrickvonplaten, @LysandreJik
- rag: @patrickvonplaten, @lhoestq
- tensorflow: @LysandreJik

Library:

- benchmarks: @patrickvonplaten
- deepspeed: @stas00
- ray/raytune: @richardliaw, @amogkam
- text generation: @patrickvonplaten
- tokenizers: @LysandreJik
- trainer: @sgugger
- pipelines: @LysandreJik

Documentation: @sgugger

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- for issues with a model report at https://discuss.huggingface.co/ and tag the model's creator.

HF projects:

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- maintained examples (not research project or legacy): @sgugger, @patil-suraj
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## Information

I'm interested in training the large T5 models with deepspeed and huggingface. More specifically, I'm interested in fine-tuning a T5-11B model on one RTX-8000 48 GB GPU (similarly to https://huggingface.co/blog/zero-deepspeed-fairscale, https://github.com/huggingface/transformers/issues/9996). 

However, when I try to use deepspeed the amount of memory on the GPU increases. For example, running the example seq2seq/run_summarization.py script with T5-Small and without deepspeed takes ~6GB, and running it with deepspeed takes ~8GB.

Model I am using: T5

The problem arises when using: The official  examples/seq2seq/run_summarization.py script.

Without deepspeed:
python examples/seq2seq/run_summarization.py --model_name_or_path t5-small --do_train  --do_eval --dataset_name cnn_dailymail --dataset_config "3.0.0"  --source_prefix "summarize: " --output_dir /tmp/tst-summarization --per_device_train_batch_size=4 --per_device_eval_batch_size=4 --overwrite_output_dir  --predict_with_genera

With deepspeed:
deepspeed examples/seq2seq/run_summarization.py --model_name_or_path t5-small --do_train  --do_eval --dataset_name cnn_dailymail --dataset_config "3.0.0"  --source_prefix "summarize: " --output_dir /tmp/tst-summarization --per_device_train_batch_size=4 --per_device_eval_batch_size=4 --overwrite_output_dir  --predict_with_generate --deepspeed examples/tests/deepspeed/ds_config.json

The tasks I am working on is:
Sequence to sequence generation.

## To reproduce

Steps to reproduce the behavior:

1. Clone transformers repo 
2. Install requirements (including deepspeed: pip install deepspeed)
3. Run summarization example without deeepspeed: 
python examples/seq2seq/run_summarization.py --model_name_or_path t5-small --do_train  --do_eval --dataset_name cnn_dailymail --dataset_config "3.0.0"  --source_prefix "summarize: " --output_dir /tmp/tst-summarization --per_device_train_batch_size=4 --per_device_eval_batch_size=4 --overwrite_output_dir  --predict_with_genera
4. Run summarization example with deepspeed: 
deepspeed examples/seq2seq/run_summarization.py --model_name_or_path t5-small --do_train  --do_eval --dataset_name cnn_dailymail --dataset_config "3.0.0"  --source_prefix "summarize: " --output_dir /tmp/tst-summarization --per_device_train_batch_size=4 --per_device_eval_batch_size=4 --overwrite_output_dir  --predict_with_generate --deepspeed examples/tests/deepspeed/ds_config.json

## Expected behavior

I would expect using deepspeed would reduce the amount of memory being used by the GPU.

Comments:
Also adding the logs from the beginning of training with deepspeed:

deepspeed examples/seq2seq/run_summarization.py --model_name_or_path t5-small --do_train  --do_eval --dataset_name cnn_dailymail --dataset_config "3.0.0"  --source_prefix "summarize: " --output_dir /tmp/tst-summarization --per_device_train_batch_size=4 --per_device_eval_batch_size=4 --overwrite_output_dir  --predict_with_generate --deepspeed examples/tests/deepspeed/ds_config.json
[2021-03-27 17:02:34,357] [WARNING] [runner.py:117:fetch_hostfile] Unable to find hostfile, will proceed with training with local resources only.
[2021-03-27 17:02:34,381] [INFO] [runner.py:358:main] cmd = /media/disk1/oriyor/hf_venv_3.6/bin/python -u -m deepspeed.launcher.launch --world_info=eyJsb2NhbGhvc3QiOiBbMF19 --master_addr=127.0.0.1 --master_port=29500 examples/seq2seq/run_summarization.py --model_name_or_path t5-small --do_train --do_eval --dataset_name cnn_dailymail --dataset_config 3.0.0 --source_prefix summarize:  --output_dir /tmp/tst-summarization --per_device_train_batch_size=4 --per_device_eval_batch_size=4 --overwrite_output_dir --predict_with_generate --deepspeed examples/tests/deepspeed/ds_config.json
[2021-03-27 17:02:34,981] [INFO] [launch.py:80:main] WORLD INFO DICT: {'localhost': [0]}
[2021-03-27 17:02:34,981] [INFO] [launch.py:89:main] nnodes=1, num_local_procs=1, node_rank=0
[2021-03-27 17:02:34,981] [INFO] [launch.py:101:main] global_rank_mapping=defaultdict(<class 'list'>, {'localhost': [0]})
[2021-03-27 17:02:34,981] [INFO] [launch.py:102:main] dist_world_size=1
[2021-03-27 17:02:34,981] [INFO] [launch.py:105:main] Setting CUDA_VISIBLE_DEVICES=0
[2021-03-27 17:02:36,820] [INFO] [distributed.py:47:init_distributed] Initializing torch distributed with backend: nccl
WARNING:__main__:Process rank: 0, device: cuda:0, n_gpu: 1distributed training: True, 16-bits training: False
INFO:__main__:Training/evaluation parameters Seq2SeqTrainingArguments(output_dir='/tmp/tst-summarization', overwrite_output_dir=True, do_train=True, do_eval=True, do_predict=False, evaluation_strategy=<IntervalStrategy.NO: 'no'>, prediction_loss_only=False, per_device_train_batch_size=4, per_device_eval_batch_size=4, per_gpu_train_batch_size=None, per_gpu_eval_batch_size=None, gradient_accumulation_steps=1, eval_accumulation_steps=None, learning_rate=5e-05, weight_decay=0.0, adam_beta1=0.9, adam_beta2=0.999, adam_epsilon=1e-08, max_grad_norm=1.0, num_train_epochs=3.0, max_steps=-1, lr_scheduler_type=<SchedulerType.LINEAR: 'linear'>, warmup_ratio=0.0, warmup_steps=0, logging_dir='runs/Mar27_17-02-36_rack-jonathan-g04', logging_strategy=<IntervalStrategy.STEPS: 'steps'>, logging_first_step=False, logging_steps=500, save_strategy=<IntervalStrategy.STEPS: 'steps'>, save_steps=500, save_total_limit=None, no_cuda=False, seed=42, fp16=False, fp16_opt_level='O1', fp16_backend='auto', fp16_full_eval=False, local_rank=0, tpu_num_cores=None, tpu_metrics_debug=False, debug=False, dataloader_drop_last=False, eval_steps=500, dataloader_num_workers=0, past_index=-1, run_name='/tmp/tst-summarization', disable_tqdm=False, remove_unused_columns=True, label_names=None, load_best_model_at_end=False, metric_for_best_model=None, greater_is_better=None, ignore_data_skip=False, sharded_ddp=[], deepspeed='examples/tests/deepspeed/ds_config.json', label_smoothing_factor=0.0, adafactor=False, group_by_length=False, report_to=['tensorboard'], ddp_find_unused_parameters=None, dataloader_pin_memory=True, skip_memory_metrics=False, sortish_sampler=False, predict_with_generate=True)
WARNING:datasets.builder:Reusing dataset cnn_dailymail (/home/oriy/.cache/huggingface/datasets/cnn_dailymail/3.0.0/3.0.0/0a01b1abede4f646130574f203de57a293ded8a7a11e3406a539453afdfeb2c0)
loading configuration file https://huggingface.co/t5-small/resolve/main/config.json from cache at /home/oriy/.cache/huggingface/transformers/fe501e8fd6425b8ec93df37767fcce78ce626e34cc5edc859c662350cf712e41.406701565c0afd9899544c1cb8b93185a76f00b31e5ce7f6e18bbaef02241985
Model config T5Config {
  "architectures": [
    "T5WithLMHeadModel"
  ],
  "d_ff": 2048,
  "d_kv": 64,
  "d_model": 512,
  "decoder_start_token_id": 0,
  "dropout_rate": 0.1,
  "eos_token_id": 1,
  "feed_forward_proj": "relu",
  "initializer_factor": 1.0,
  "is_encoder_decoder": true,
  "layer_norm_epsilon": 1e-06,
  "model_type": "t5",
  "n_positions": 512,
  "num_decoder_layers": 6,
  "num_heads": 8,
  "num_layers": 6,
  "output_past": true,
  "pad_token_id": 0,
  "relative_attention_num_buckets": 32,
  "task_specific_params": {
    "summarization": {
      "early_stopping": true,
      "length_penalty": 2.0,
      "max_length": 200,
      "min_length": 30,
      "no_repeat_ngram_size": 3,
      "num_beams": 4,
      "prefix": "summarize: "
    },
    "translation_en_to_de": {
      "early_stopping": true,
      "max_length": 300,
      "num_beams": 4,
      "prefix": "translate English to German: "
    },
    "translation_en_to_fr": {
      "early_stopping": true,
      "max_length": 300,
      "num_beams": 4,
      "prefix": "translate English to French: "
    },
    "translation_en_to_ro": {
      "early_stopping": true,
      "max_length": 300,
      "num_beams": 4,
      "prefix": "translate English to Romanian: "
    }
  },
  "transformers_version": "4.5.0.dev0",
  "use_cache": true,
  "vocab_size": 32128
}

loading configuration file https://huggingface.co/t5-small/resolve/main/config.json from cache at /home/oriy/.cache/huggingface/transformers/fe501e8fd6425b8ec93df37767fcce78ce626e34cc5edc859c662350cf712e41.406701565c0afd9899544c1cb8b93185a76f00b31e5ce7f6e18bbaef02241985
Model config T5Config {
  "architectures": [
    "T5WithLMHeadModel"
  ],
  "d_ff": 2048,
  "d_kv": 64,
  "d_model": 512,
  "decoder_start_token_id": 0,
  "dropout_rate": 0.1,
  "eos_token_id": 1,
  "feed_forward_proj": "relu",
  "initializer_factor": 1.0,
  "is_encoder_decoder": true,
  "layer_norm_epsilon": 1e-06,
  "model_type": "t5",
  "n_positions": 512,
  "num_decoder_layers": 6,
  "num_heads": 8,
  "num_layers": 6,
  "output_past": true,
  "pad_token_id": 0,
  "relative_attention_num_buckets": 32,
  "task_specific_params": {
    "summarization": {
      "early_stopping": true,
      "length_penalty": 2.0,
      "max_length": 200,
      "min_length": 30,
      "no_repeat_ngram_size": 3,
      "num_beams": 4,
      "prefix": "summarize: "
    },
    "translation_en_to_de": {
      "early_stopping": true,
      "max_length": 300,
      "num_beams": 4,
      "prefix": "translate English to German: "
    },
    "translation_en_to_fr": {
      "early_stopping": true,
      "max_length": 300,
      "num_beams": 4,
      "prefix": "translate English to French: "
    },
    "translation_en_to_ro": {
      "early_stopping": true,
      "max_length": 300,
      "num_beams": 4,
      "prefix": "translate English to Romanian: "
    }
  },
  "transformers_version": "4.5.0.dev0",
  "use_cache": true,
  "vocab_size": 32128
}

loading file https://huggingface.co/t5-small/resolve/main/spiece.model from cache at /home/oriy/.cache/huggingface/transformers/65fc04e21f45f61430aea0c4fedffac16a4d20d78b8e6601d8d996ebefefecd2.3b69006860e7b5d0a63ffdddc01ddcd6b7c318a6f4fd793596552c741734c62d
loading file https://huggingface.co/t5-small/resolve/main/tokenizer.json from cache at /home/oriy/.cache/huggingface/transformers/06779097c78e12f47ef67ecb728810c2ae757ee0a9efe9390c6419783d99382d.8627f1bd5d270a9fd2e5a51c8bec3223896587cc3cfe13edeabb0992ab43c529
loading file https://huggingface.co/t5-small/resolve/main/added_tokens.json from cache at None
loading file https://huggingface.co/t5-small/resolve/main/special_tokens_map.json from cache at None
loading file https://huggingface.co/t5-small/resolve/main/tokenizer_config.json from cache at None
loading weights file https://huggingface.co/t5-small/resolve/main/pytorch_model.bin from cache at /home/oriy/.cache/huggingface/transformers/fee5a3a0ae379232608b6eed45d2d7a0d2966b9683728838412caccc41b4b0ed.ddacdc89ec88482db20c676f0861a336f3d0409f94748c209847b49529d73885
All model checkpoint weights were used when initializing T5ForConditionalGeneration.

All the weights of T5ForConditionalGeneration were initialized from the model checkpoint at t5-small.
If your task is similar to the task the model of the checkpoint was trained on, you can already use T5ForConditionalGeneration for predictions without further training.
WARNING:datasets.arrow_dataset:Loading cached processed dataset at /home/oriy/.cache/huggingface/datasets/cnn_dailymail/3.0.0/3.0.0/0a01b1abede4f646130574f203de57a293ded8a7a11e3406a539453afdfeb2c0/cache-3c2d8ad9af1d1a3e.arrow
WARNING:datasets.arrow_dataset:Loading cached processed dataset at /home/oriy/.cache/huggingface/datasets/cnn_dailymail/3.0.0/3.0.0/0a01b1abede4f646130574f203de57a293ded8a7a11e3406a539453afdfeb2c0/cache-2e7e82c8de410d07.arrow
Updating the `scheduler` config from examples/tests/deepspeed/ds_config.json with other command line arguments
setting optimizer.params.lr to 5e-05
setting optimizer.params.betas to [0.9, 0.999]
setting optimizer.params.eps to 1e-08
setting optimizer.params.weight_decay to 0.0
Updating the `scheduler` config from examples/tests/deepspeed/ds_config.json with other command line arguments
setting scheduler.params.warmup_max_lr to 5e-05
setting scheduler.params.warmup_num_steps to 0
[2021-03-27 17:02:46,871] [INFO] [logging.py:60:log_dist] [Rank 0] DeepSpeed info: version=0.3.13, git-hash=unknown, git-branch=unknown
[2021-03-27 17:02:48,970] [INFO] [engine.py:77:_initialize_parameter_parallel_groups] data_parallel_size: 1, parameter_parallel_size: 1
huggingface/tokenizers: The current process just got forked, after parallelism has already been used. Disabling parallelism to avoid deadlocks...
To disable this warning, you can either:
	- Avoid using `tokenizers` before the fork if possible
	- Explicitly set the environment variable TOKENIZERS_PARALLELISM=(true | false)
huggingface/tokenizers: The current process just got forked, after parallelism has already been used. Disabling parallelism to avoid deadlocks...
To disable this warning, you can either:
	- Avoid using `tokenizers` before the fork if possible
	- Explicitly set the environment variable TOKENIZERS_PARALLELISM=(true | false)
huggingface/tokenizers: The current process just got forked, after parallelism has already been used. Disabling parallelism to avoid deadlocks...
To disable this warning, you can either:
	- Avoid using `tokenizers` before the fork if possible
	- Explicitly set the environment variable TOKENIZERS_PARALLELISM=(true | false)
huggingface/tokenizers: The current process just got forked, after parallelism has already been used. Disabling parallelism to avoid deadlocks...
To disable this warning, you can either:
	- Avoid using `tokenizers` before the fork if possible
	- Explicitly set the environment variable TOKENIZERS_PARALLELISM=(true | false)
huggingface/tokenizers: The current process just got forked, after parallelism has already been used. Disabling parallelism to avoid deadlocks...
To disable this warning, you can either:
	- Avoid using `tokenizers` before the fork if possible
	- Explicitly set the environment variable TOKENIZERS_PARALLELISM=(true | false)
Using /home/oriy/.cache/torch_extensions as PyTorch extensions root...
huggingface/tokenizers: The current process just got forked, after parallelism has already been used. Disabling parallelism to avoid deadlocks...
To disable this warning, you can either:
	- Avoid using `tokenizers` before the fork if possible
	- Explicitly set the environment variable TOKENIZERS_PARALLELISM=(true | false)
huggingface/tokenizers: The current process just got forked, after parallelism has already been used. Disabling parallelism to avoid deadlocks...
To disable this warning, you can either:
	- Avoid using `tokenizers` before the fork if possible
	- Explicitly set the environment variable TOKENIZERS_PARALLELISM=(true | false)
huggingface/tokenizers: The current process just got forked, after parallelism has already been used. Disabling parallelism to avoid deadlocks...
To disable this warning, you can either:
	- Avoid using `tokenizers` before the fork if possible
	- Explicitly set the environment variable TOKENIZERS_PARALLELISM=(true | false)
Detected CUDA files, patching ldflags
Emitting ninja build file /home/oriy/.cache/torch_extensions/cpu_adam/build.ninja...
Building extension module cpu_adam...
Allowing ninja to set a default number of workers... (overridable by setting the environment variable MAX_JOBS=N)
huggingface/tokenizers: The current process just got forked, after parallelism has already been used. Disabling parallelism to avoid deadlocks...
To disable this warning, you can either:
	- Avoid using `tokenizers` before the fork if possible
	- Explicitly set the environment variable TOKENIZERS_PARALLELISM=(true | false)
ninja: no work to do.
Loading extension module cpu_adam...
Time to load cpu_adam op: 0.43370747566223145 seconds
Adam Optimizer #0 is created with AVX2 arithmetic capability.
Config: alpha=0.000050, betas=(0.900000, 0.999000), weight_decay=0.000000, adam_w=1
[2021-03-27 17:02:52,144] [INFO] [engine.py:602:_configure_optimizer] Using DeepSpeed Optimizer param name adam as basic optimizer
[2021-03-27 17:02:52,145] [INFO] [engine.py:606:_configure_optimizer] DeepSpeed Basic Optimizer = DeepSpeedCPUAdam
Checking ZeRO support for optimizer=DeepSpeedCPUAdam type=<class 'deepspeed.ops.adam.cpu_adam.DeepSpeedCPUAdam'>
[2021-03-27 17:02:52,145] [INFO] [logging.py:60:log_dist] [Rank 0] Creating fp16 ZeRO stage 2 optimizer
Using /home/oriy/.cache/torch_extensions as PyTorch extensions root...
huggingface/tokenizers: The current process just got forked, after parallelism has already been used. Disabling parallelism to avoid deadlocks...
To disable this warning, you can either:
	- Avoid using `tokenizers` before the fork if possible
	- Explicitly set the environment variable TOKENIZERS_PARALLELISM=(true | false)
huggingface/tokenizers: The current process just got forked, after parallelism has already been used. Disabling parallelism to avoid deadlocks...
To disable this warning, you can either:
	- Avoid using `tokenizers` before the fork if possible
	- Explicitly set the environment variable TOKENIZERS_PARALLELISM=(true | false)
huggingface/tokenizers: The current process just got forked, after parallelism has already been used. Disabling parallelism to avoid deadlocks...
To disable this warning, you can either:
	- Avoid using `tokenizers` before the fork if possible
	- Explicitly set the environment variable TOKENIZERS_PARALLELISM=(true | false)
Emitting ninja build file /home/oriy/.cache/torch_extensions/utils/build.ninja...
Building extension module utils...
Allowing ninja to set a default number of workers... (overridable by setting the environment variable MAX_JOBS=N)
huggingface/tokenizers: The current process just got forked, after parallelism has already been used. Disabling parallelism to avoid deadlocks...
To disable this warning, you can either:
	- Avoid using `tokenizers` before the fork if possible
	- Explicitly set the environment variable TOKENIZERS_PARALLELISM=(true | false)
ninja: no work to do.
Loading extension module utils...
Time to load utils op: 0.29197263717651367 seconds
[2021-03-27 17:02:52,437] [INFO] [stage2.py:130:__init__] Reduce bucket size 200000000.0
[2021-03-27 17:02:52,438] [INFO] [stage2.py:131:__init__] Allgather bucket size 200000000.0
[2021-03-27 17:02:52,438] [INFO] [stage2.py:132:__init__] CPU Offload: True
[2021-03-27 17:02:52,846] [INFO] [stage2.py:399:__init__] optimizer state initialized
[2021-03-27 17:02:52,846] [INFO] [logging.py:60:log_dist] [Rank 0] DeepSpeed Final Optimizer = adam
[2021-03-27 17:02:52,847] [INFO] [engine.py:439:_configure_lr_scheduler] DeepSpeed using configured LR scheduler = WarmupLR
[2021-03-27 17:02:52,847] [INFO] [logging.py:60:log_dist] [Rank 0] DeepSpeed LR Scheduler = <deepspeed.runtime.lr_schedules.WarmupLR object at 0x7fea742ef2b0>
[2021-03-27 17:02:52,847] [INFO] [logging.py:60:log_dist] [Rank 0] step=0, skipped=0, lr=[5e-05], mom=[[0.9, 0.999]]
[2021-03-27 17:02:52,847] [INFO] [config.py:737:print] DeepSpeedEngine configuration:
[2021-03-27 17:02:52,847] [INFO] [config.py:741:print]   activation_checkpointing_config  {
    "contiguous_memory_optimization": false,
    "cpu_checkpointing": false,
    "number_checkpoints": null,
    "partition_activations": false,
    "profile": false,
    "synchronize_checkpoint_boundary": false
}
[2021-03-27 17:02:52,847] [INFO] [config.py:741:print]   allreduce_always_fp32 ........ False
[2021-03-27 17:02:52,847] [INFO] [config.py:741:print]   amp_enabled .................. False
[2021-03-27 17:02:52,847] [INFO] [config.py:741:print]   amp_params ................... False
[2021-03-27 17:02:52,847] [INFO] [config.py:741:print]   checkpoint_tag_validation_enabled  True
[2021-03-27 17:02:52,847] [INFO] [config.py:741:print]   checkpoint_tag_validation_fail  False
[2021-03-27 17:02:52,847] [INFO] [config.py:741:print]   disable_allgather ............ False
[2021-03-27 17:02:52,848] [INFO] [config.py:741:print]   dump_state ................... False
[2021-03-27 17:02:52,848] [INFO] [config.py:741:print]   dynamic_loss_scale_args ...... {'init_scale': 4294967296, 'scale_window': 1000, 'delayed_shift': 2, 'min_scale': 1}
[2021-03-27 17:02:52,848] [INFO] [config.py:741:print]   elasticity_enabled ........... False
[2021-03-27 17:02:52,848] [INFO] [config.py:741:print]   flops_profiler_config ........ {
    "detailed": true,
    "enabled": false,
    "module_depth": -1,
    "profile_step": 1,
    "top_modules": 3
}
[2021-03-27 17:02:52,848] [INFO] [config.py:741:print]   fp16_enabled ................. True
[2021-03-27 17:02:52,848] [INFO] [config.py:741:print]   global_rank .................. 0
[2021-03-27 17:02:52,848] [INFO] [config.py:741:print]   gradient_accumulation_steps .. 1
[2021-03-27 17:02:52,848] [INFO] [config.py:741:print]   gradient_clipping ............ 1.0
[2021-03-27 17:02:52,848] [INFO] [config.py:741:print]   gradient_predivide_factor .... 1.0
[2021-03-27 17:02:52,848] [INFO] [config.py:741:print]   initial_dynamic_scale ........ 4294967296
[2021-03-27 17:02:52,848] [INFO] [config.py:741:print]   loss_scale ................... 0
[2021-03-27 17:02:52,848] [INFO] [config.py:741:print]   memory_breakdown ............. False
[2021-03-27 17:02:52,848] [INFO] [config.py:741:print]   optimizer_legacy_fusion ...... False
[2021-03-27 17:02:52,848] [INFO] [config.py:741:print]   optimizer_name ............... adam
[2021-03-27 17:02:52,848] [INFO] [config.py:741:print]   optimizer_params ............. {'lr': 5e-05, 'betas': [0.9, 0.999], 'eps': 1e-08, 'weight_decay': 0.0}
[2021-03-27 17:02:52,848] [INFO] [config.py:741:print]   pipeline ..................... {'stages': 'auto', 'partition': 'best', 'seed_layers': False, 'activation_checkpoint_interval': 0}
[2021-03-27 17:02:52,848] [INFO] [config.py:741:print]   pld_enabled .................. False
[2021-03-27 17:02:52,848] [INFO] [config.py:741:print]   pld_params ................... False
[2021-03-27 17:02:52,848] [INFO] [config.py:741:print]   prescale_gradients ........... False
[2021-03-27 17:02:52,849] [INFO] [config.py:741:print]   scheduler_name ............... WarmupLR
[2021-03-27 17:02:52,849] [INFO] [config.py:741:print]   scheduler_params ............. {'warmup_min_lr': 0, 'warmup_max_lr': 5e-05, 'warmup_num_steps': 0}
[2021-03-27 17:02:52,849] [INFO] [config.py:741:print]   sparse_attention ............. None
[2021-03-27 17:02:52,849] [INFO] [config.py:741:print]   sparse_gradients_enabled ..... False
[2021-03-27 17:02:52,849] [INFO] [config.py:741:print]   steps_per_print .............. 10
[2021-03-27 17:02:52,849] [INFO] [config.py:741:print]   tensorboard_enabled .......... False
[2021-03-27 17:02:52,849] [INFO] [config.py:741:print]   tensorboard_job_name ......... DeepSpeedJobName
[2021-03-27 17:02:52,849] [INFO] [config.py:741:print]   tensorboard_output_path ...... 
[2021-03-27 17:02:52,849] [INFO] [config.py:741:print]   train_batch_size ............. 4
[2021-03-27 17:02:52,849] [INFO] [config.py:741:print]   train_micro_batch_size_per_gpu  4
[2021-03-27 17:02:52,849] [INFO] [config.py:741:print]   wall_clock_breakdown ......... False
[2021-03-27 17:02:52,849] [INFO] [config.py:741:print]   world_size ................... 1
[2021-03-27 17:02:52,849] [INFO] [config.py:741:print]   zero_allow_untested_optimizer  False
[2021-03-27 17:02:52,849] [INFO] [config.py:741:print]   zero_config .................. {
    "allgather_bucket_size": 200000000.0,
    "allgather_partitions": true,
    "contiguous_gradients": true,
    "cpu_offload": true,
    "cpu_offload_params": false,
    "cpu_offload_use_pin_memory": false,
    "elastic_checkpoint": true,
    "load_from_fp32_weights": true,
    "max_live_parameters": 1000000000,
    "max_reuse_distance": 1000000000,
    "overlap_comm": true,
    "param_persistence_threshold": 100000,
    "prefetch_bucket_size": 50000000,
    "reduce_bucket_size": 200000000.0,
    "reduce_scatter": true,
    "stage": 2,
    "sub_group_size": 1000000000000
}
[2021-03-27 17:02:52,849] [INFO] [config.py:741:print]   zero_enabled ................. True
[2021-03-27 17:02:52,849] [INFO] [config.py:741:print]   zero_optimization_stage ...... 2
[2021-03-27 17:02:52,850] [INFO] [config.py:748:print]   json = {
    "fp16":{
        "enabled":true,
        "hysteresis":2,
        "loss_scale":0,
        "loss_scale_window":1000,
        "min_loss_scale":1
    },
    "gradient_accumulation_steps":1,
    "gradient_clipping":1.0,
    "optimizer":{
        "params":{
            "betas":[
                0.9,
                0.999
            ],
            "eps":1e-08,
            "lr":5e-05,
            "weight_decay":0.0
        },
        "type":"Adam"
    },
    "scheduler":{
        "params":{
            "warmup_max_lr":5e-05,
            "warmup_min_lr":0,
            "warmup_num_steps":0
        },
        "type":"WarmupLR"
    },
    "train_micro_batch_size_per_gpu":4,
    "zero_optimization":{
        "allgather_bucket_size":200000000.0,
        "allgather_partitions":true,
        "contiguous_gradients":true,
        "cpu_offload":true,
        "overlap_comm":true,
        "reduce_bucket_size":200000000.0,
        "reduce_scatter":true,
        "stage":2
    }
}
Using /home/oriy/.cache/torch_extensions as PyTorch extensions root...
No modifications detected for re-loaded extension module utils, skipping build step...
Loading extension module utils...
Time to load utils op: 0.0005881786346435547 seconds
***** Running training *****
  Num examples = 287113
  Num Epochs = 3
  Instantaneous batch size per device = 4
  Total train batch size (w. parallel, distributed & accumulation) = 4
  Gradient Accumulation steps = 1
  Total optimization steps = 215337
  0%|                                                                                                                                                                                                                                                | 0/215337 [00:00<?, ?it/s][2021-03-27 17:02:53,333] [INFO] [stage2.py:1391:step] [deepspeed] fp16 dynamic loss scale overflow! Rank 0 Skipping step. Attempted loss scale: 4294967296, reducing to 4294967296
  0%|                                                                                                                                                                                                                                     | 1/215337 [00:00<26:38:16,  2.25it/s][2021-03-27 17:02:53,687] [INFO] [stage2.py:1391:step] [deepspeed] fp16 dynamic loss scale overflow! Rank 0 Skipping step. Attempted loss scale: 4294967296, reducing to 2147483648.0


Next week I hope https://github.com/huggingface/transformers/pull/10753 will be finished, but for now here are the results on rtx-3090 24GB card with the unfinished zero-3 PR.

As you can see Deepspeed zero3's cpu offload is a way way more memory-efficient:

```
# baseline

BS=4; CUDA_VISIBLE_DEVICES=0 PYTHONPATH=src USE_TF=0 python examples/seq2seq/run_translation.py --model_name_or_path t5-small --output_dir /tmp/zero3 --overwrite_output_dir --max_train_samples 64 --max_val_samples 64 --max_source_length 128 --max_target_length 128 --val_max_target_length 128 --do_train --num_train_epochs 1 --per_device_train_batch_size $BS --per_device_eval_batch_size $BS --learning_rate 3e-3 --warmup_steps 500 --predict_with_generate --logging_steps 0 --save_steps 0 --eval_steps 1 --group_by_length  --adafactor --dataset_name wmt16 --dataset_config ro-en --source_lang en --target_lang ro --source_prefix "translate English to Romanian: " 

***** train metrics *****
  epoch                      =   1.0
  init_mem_cpu_alloc_delta   =   3MB
  init_mem_cpu_peaked_delta  =   0MB
  init_mem_gpu_alloc_delta   = 230MB
  init_mem_gpu_peaked_delta  =   0MB
  train_mem_cpu_alloc_delta  =  60MB
  train_mem_cpu_peaked_delta =   0MB
  train_mem_gpu_alloc_delta  = 231MB
  train_mem_gpu_peaked_delta = 226MB
  train_runtime              = 3.619
  train_samples              =    64
  train_samples_per_second   = 4.421

# zero2


BS=4; PYTHONPATH=src USE_TF=0 deepspeed --num_gpus 1 examples/seq2seq/run_translation.py --model_name_or_path t5-small --output_dir /tmp/zero3 --overwrite_output_dir --max_train_samples 64 --max_val_samples 64 --max_source_length 128 --max_target_length 128 --val_max_target_length 128 --do_train --num_train_epochs 1 --per_device_train_batch_size $BS --per_device_eval_batch_size $BS --learning_rate 3e-3 --warmup_steps 500 --predict_with_generate --logging_steps 0 --save_steps 0 --eval_steps 1 --group_by_length  --adafactor --dataset_name wmt16 --dataset_config ro-en --source_lang en --target_lang ro --source_prefix "translate English to Romanian: " --deepspeed examples/tests/deepspeed/ds_config_zero2.json


***** train metrics *****
  epoch                      =    1.0
  init_mem_cpu_alloc_delta   =    7MB
  init_mem_cpu_peaked_delta  =    0MB
  init_mem_gpu_alloc_delta   =    0MB
  init_mem_gpu_peaked_delta  =    0MB
  train_mem_cpu_alloc_delta  =   70MB
  train_mem_cpu_peaked_delta =    0MB
  train_mem_gpu_alloc_delta  =  148MB
  train_mem_gpu_peaked_delta = 3559MB
  train_runtime              = 5.0669
  train_samples              =     64
  train_samples_per_second   =  3.158


# zero3


BS=4; PYTHONPATH=src USE_TF=0 deepspeed --num_gpus 1 examples/seq2seq/run_translation.py --model_name_or_path t5-small --output_dir /tmp/zero3 --overwrite_output_dir --max_train_samples 64 --max_val_samples 64 --max_source_length 128 --max_target_length 128 --val_max_target_length 128 --do_train --num_train_epochs 1 --per_device_train_batch_size $BS --per_device_eval_batch_size $BS --learning_rate 3e-3 --warmup_steps 500 --predict_with_generate --logging_steps 0 --save_steps 0 --eval_steps 1 --group_by_length  --adafactor --dataset_name wmt16 --dataset_config ro-en --source_lang en --target_lang ro --source_prefix "translate English to Romanian: " --deepspeed examples/tests/deepspeed/ds_config_zero3.json

***** train metrics *****
  epoch                      =    1.0
  init_mem_cpu_alloc_delta   =    7MB
  init_mem_cpu_peaked_delta  =    0MB
  init_mem_gpu_alloc_delta   =    0MB
  init_mem_gpu_peaked_delta  =    0MB
  train_mem_cpu_alloc_delta  =   71MB
  train_mem_cpu_peaked_delta =    0MB
  train_mem_gpu_alloc_delta  =  -52MB
  train_mem_gpu_peaked_delta =  244MB
  train_runtime              = 7.6324
  train_samples              =     64
  train_samples_per_second   =  2.096
```

The config files are from the PR I linked to in the first para.

So please give us a few more days - this is also depending on deepspeed merging several PRs and making a new release.


I suspect my cpu memory profiling functions are missing some allocations, which is odd. Surely, there must be more cpu memory used with cpu_offload. I will investigate this. 

Suspecting that `tracemalloc` doesn't tracks c++ allocations, which is what deepspeed does. might have to switch to sampling, but python threads's GIL is a big problem to get correct results.

**edit:** this should fix it: https://github.com/huggingface/transformers/pull/10937

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