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zero_to_fp32.py DELETED
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- #!/usr/bin/env python
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-
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- # Copyright (c) Microsoft Corporation.
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- # SPDX-License-Identifier: Apache-2.0
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-
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- # DeepSpeed Team
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-
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- # This script extracts fp32 consolidated weights from a zero 2 and 3 DeepSpeed checkpoints. It gets
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- # copied into the top level checkpoint dir, so the user can easily do the conversion at any point in
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- # the future. Once extracted, the weights don't require DeepSpeed and can be used in any
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- # application.
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- #
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- # example: python zero_to_fp32.py . pytorch_model.bin
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-
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- import argparse
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- import torch
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- import glob
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- import math
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- import os
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- import re
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- from collections import OrderedDict
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- from dataclasses import dataclass
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-
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- # while this script doesn't use deepspeed to recover data, since the checkpoints are pickled with
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- # DeepSpeed data structures it has to be available in the current python environment.
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- from deepspeed.utils import logger
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- from deepspeed.checkpoint.constants import (DS_VERSION, OPTIMIZER_STATE_DICT, SINGLE_PARTITION_OF_FP32_GROUPS,
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- FP32_FLAT_GROUPS, ZERO_STAGE, PARTITION_COUNT, PARAM_SHAPES, BUFFER_NAMES,
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- FROZEN_PARAM_SHAPES, FROZEN_PARAM_FRAGMENTS)
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-
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-
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- @dataclass
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- class zero_model_state:
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- buffers: dict()
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- param_shapes: dict()
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- shared_params: list
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- ds_version: int
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- frozen_param_shapes: dict()
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- frozen_param_fragments: dict()
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-
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-
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- debug = 0
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-
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- # load to cpu
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- device = torch.device('cpu')
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-
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-
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- def atoi(text):
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- return int(text) if text.isdigit() else text
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-
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-
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- def natural_keys(text):
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- '''
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- alist.sort(key=natural_keys) sorts in human order
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- http://nedbatchelder.com/blog/200712/human_sorting.html
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- (See Toothy's implementation in the comments)
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- '''
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- return [atoi(c) for c in re.split(r'(\d+)', text)]
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-
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-
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- def get_model_state_file(checkpoint_dir, zero_stage):
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- if not os.path.isdir(checkpoint_dir):
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- raise FileNotFoundError(f"Directory '{checkpoint_dir}' doesn't exist")
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-
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- # there should be only one file
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- if zero_stage == 2:
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- file = os.path.join(checkpoint_dir, "mp_rank_00_model_states.pt")
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- elif zero_stage == 3:
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- file = os.path.join(checkpoint_dir, "zero_pp_rank_0_mp_rank_00_model_states.pt")
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-
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- if not os.path.exists(file):
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- raise FileNotFoundError(f"can't find model states file at '{file}'")
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-
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- return file
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-
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-
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- def get_checkpoint_files(checkpoint_dir, glob_pattern):
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- # XXX: need to test that this simple glob rule works for multi-node setup too
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- ckpt_files = sorted(glob.glob(os.path.join(checkpoint_dir, glob_pattern)), key=natural_keys)
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-
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- if len(ckpt_files) == 0:
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- raise FileNotFoundError(f"can't find {glob_pattern} files in directory '{checkpoint_dir}'")
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-
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- return ckpt_files
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-
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-
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- def get_optim_files(checkpoint_dir):
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- return get_checkpoint_files(checkpoint_dir, "*_optim_states.pt")
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-
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-
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- def get_model_state_files(checkpoint_dir):
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- return get_checkpoint_files(checkpoint_dir, "*_model_states.pt")
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-
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-
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- def parse_model_states(files):
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- zero_model_states = []
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- for file in files:
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- state_dict = torch.load(file, map_location=device)
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-
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- if BUFFER_NAMES not in state_dict:
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- raise ValueError(f"{file} is not a model state checkpoint")
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- buffer_names = state_dict[BUFFER_NAMES]
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- if debug:
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- print("Found buffers:", buffer_names)
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-
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- # recover just the buffers while restoring them to fp32 if they were saved in fp16
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- buffers = {k: v.float() for k, v in state_dict["module"].items() if k in buffer_names}
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- param_shapes = state_dict[PARAM_SHAPES]
109
-
110
- # collect parameters that are included in param_shapes
111
- param_names = []
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- for s in param_shapes:
113
- for name in s.keys():
114
- param_names.append(name)
115
-
116
- # update with frozen parameters
117
- frozen_param_shapes = state_dict.get(FROZEN_PARAM_SHAPES, None)
118
- if frozen_param_shapes is not None:
119
- if debug:
120
- print(f"Found frozen_param_shapes: {frozen_param_shapes}")
121
- param_names += list(frozen_param_shapes.keys())
122
-
123
- # record shared parameters so that they can be recovered based on partners
124
- # this is because such parameters holding reference only are not saved by optimizer
125
- shared_params = []
126
- for param in state_dict["module"]:
127
- if param not in [*param_names, *buffer_names]:
128
- for share_param in state_dict["module"]:
129
- if (state_dict["module"][share_param].data_ptr() == state_dict["module"][param].data_ptr()
130
- and share_param != param):
131
- shared_params.append([param, share_param])
132
- break
133
-
134
- ds_version = state_dict.get(DS_VERSION, None)
135
-
136
- frozen_param_fragments = state_dict.get(FROZEN_PARAM_FRAGMENTS, None)
137
-
138
- z_model_state = zero_model_state(buffers=buffers,
139
- param_shapes=param_shapes,
140
- shared_params=shared_params,
141
- ds_version=ds_version,
142
- frozen_param_shapes=frozen_param_shapes,
143
- frozen_param_fragments=frozen_param_fragments)
144
- zero_model_states.append(z_model_state)
145
-
146
- return zero_model_states
147
-
148
-
149
- def parse_optim_states(files, ds_checkpoint_dir):
150
-
151
- total_files = len(files)
152
- state_dicts = []
153
- for f in files:
154
- state_dicts.append(torch.load(f, map_location=device))
155
-
156
- if not ZERO_STAGE in state_dicts[0][OPTIMIZER_STATE_DICT]:
157
- raise ValueError(f"{files[0]} is not a zero checkpoint")
158
- zero_stage = state_dicts[0][OPTIMIZER_STATE_DICT][ZERO_STAGE]
159
- world_size = state_dicts[0][OPTIMIZER_STATE_DICT][PARTITION_COUNT]
160
-
161
- # For ZeRO-2 each param group can have different partition_count as data parallelism for expert
162
- # parameters can be different from data parallelism for non-expert parameters. So we can just
163
- # use the max of the partition_count to get the dp world_size.
164
-
165
- if type(world_size) is list:
166
- world_size = max(world_size)
167
-
168
- if world_size != total_files:
169
- raise ValueError(
170
- f"Expected {world_size} of '*_optim_states.pt' under '{ds_checkpoint_dir}' but found {total_files} files. "
171
- "Possibly due to an overwrite of an old checkpoint, or a checkpoint didn't get saved by one or more processes."
172
- )
173
-
174
- # the groups are named differently in each stage
175
- if zero_stage == 2:
176
- fp32_groups_key = SINGLE_PARTITION_OF_FP32_GROUPS
177
- elif zero_stage == 3:
178
- fp32_groups_key = FP32_FLAT_GROUPS
179
- else:
180
- raise ValueError(f"unknown zero stage {zero_stage}")
181
-
182
- if zero_stage == 2:
183
- fp32_flat_groups = [state_dicts[i][OPTIMIZER_STATE_DICT][fp32_groups_key] for i in range(len(state_dicts))]
184
- elif zero_stage == 3:
185
- # if there is more than one param group, there will be multiple flattened tensors - one
186
- # flattened tensor per group - for simplicity merge them into a single tensor
187
- #
188
- # XXX: could make the script more memory efficient for when there are multiple groups - it
189
- # will require matching the sub-lists of param_shapes for each param group flattened tensor
190
-
191
- fp32_flat_groups = [
192
- torch.cat(state_dicts[i][OPTIMIZER_STATE_DICT][fp32_groups_key], 0) for i in range(len(state_dicts))
193
- ]
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-
195
- return zero_stage, world_size, fp32_flat_groups
196
-
197
-
198
- def _get_fp32_state_dict_from_zero_checkpoint(ds_checkpoint_dir):
199
- """
200
- Returns fp32 state_dict reconstructed from ds checkpoint
201
-
202
- Args:
203
- - ``ds_checkpoint_dir``: path to the deepspeed checkpoint folder (where the optimizer files are)
204
-
205
- """
206
- print(f"Processing zero checkpoint '{ds_checkpoint_dir}'")
207
-
208
- optim_files = get_optim_files(ds_checkpoint_dir)
209
- zero_stage, world_size, fp32_flat_groups = parse_optim_states(optim_files, ds_checkpoint_dir)
210
- print(f"Detected checkpoint of type zero stage {zero_stage}, world_size: {world_size}")
211
-
212
- model_files = get_model_state_files(ds_checkpoint_dir)
213
-
214
- zero_model_states = parse_model_states(model_files)
215
- print(f'Parsing checkpoint created by deepspeed=={zero_model_states[0].ds_version}')
216
-
217
- if zero_stage == 2:
218
- return _get_fp32_state_dict_from_zero2_checkpoint(world_size, fp32_flat_groups, zero_model_states)
219
- elif zero_stage == 3:
220
- return _get_fp32_state_dict_from_zero3_checkpoint(world_size, fp32_flat_groups, zero_model_states)
221
-
222
-
223
- def _zero2_merge_frozen_params(state_dict, zero_model_states):
224
- if zero_model_states[0].frozen_param_shapes is None or len(zero_model_states[0].frozen_param_shapes) == 0:
225
- return
226
-
227
- frozen_param_shapes = zero_model_states[0].frozen_param_shapes
228
- frozen_param_fragments = zero_model_states[0].frozen_param_fragments
229
-
230
- if debug:
231
- num_elem = sum(s.numel() for s in frozen_param_shapes.values())
232
- print(f'rank 0: {FROZEN_PARAM_SHAPES}.numel = {num_elem}')
233
-
234
- wanted_params = len(frozen_param_shapes)
235
- wanted_numel = sum(s.numel() for s in frozen_param_shapes.values())
236
- avail_numel = sum([p.numel() for p in frozen_param_fragments.values()])
237
- print(f'Frozen params: Have {avail_numel} numels to process.')
238
- print(f'Frozen params: Need {wanted_numel} numels in {wanted_params} params')
239
-
240
- total_params = 0
241
- total_numel = 0
242
- for name, shape in frozen_param_shapes.items():
243
- total_params += 1
244
- unpartitioned_numel = shape.numel()
245
- total_numel += unpartitioned_numel
246
-
247
- state_dict[name] = frozen_param_fragments[name]
248
-
249
- if debug:
250
- print(f"{name} full shape: {shape} unpartitioned numel {unpartitioned_numel} ")
251
-
252
- print(f"Reconstructed Frozen fp32 state dict with {total_params} params {total_numel} elements")
253
-
254
-
255
- def _zero2_merge_trainable_params(state_dict, world_size, fp32_flat_groups, zero_model_states):
256
- param_shapes = zero_model_states[0].param_shapes
257
-
258
- # Reconstruction protocol:
259
- #
260
- # XXX: document this
261
-
262
- if debug:
263
- for i in range(world_size):
264
- for j in range(len(fp32_flat_groups[0])):
265
- print(f"{FP32_FLAT_GROUPS}[{i}][{j}].shape={fp32_flat_groups[i][j].shape}")
266
-
267
- # XXX: memory usage doubles here (zero2)
268
- num_param_groups = len(fp32_flat_groups[0])
269
- merged_single_partition_of_fp32_groups = []
270
- for i in range(num_param_groups):
271
- merged_partitions = [sd[i] for sd in fp32_flat_groups]
272
- full_single_fp32_vector = torch.cat(merged_partitions, 0)
273
- merged_single_partition_of_fp32_groups.append(full_single_fp32_vector)
274
- avail_numel = sum(
275
- [full_single_fp32_vector.numel() for full_single_fp32_vector in merged_single_partition_of_fp32_groups])
276
-
277
- if debug:
278
- wanted_params = sum([len(shapes) for shapes in param_shapes])
279
- wanted_numel = sum([sum(shape.numel() for shape in shapes.values()) for shapes in param_shapes])
280
- # not asserting if there is a mismatch due to possible padding
281
- print(f"Have {avail_numel} numels to process.")
282
- print(f"Need {wanted_numel} numels in {wanted_params} params.")
283
-
284
- # params
285
- # XXX: for huge models that can't fit into the host's RAM we will have to recode this to support
286
- # out-of-core computing solution
287
- total_numel = 0
288
- total_params = 0
289
- for shapes, full_single_fp32_vector in zip(param_shapes, merged_single_partition_of_fp32_groups):
290
- offset = 0
291
- avail_numel = full_single_fp32_vector.numel()
292
- for name, shape in shapes.items():
293
-
294
- unpartitioned_numel = shape.numel()
295
- total_numel += unpartitioned_numel
296
- total_params += 1
297
-
298
- if debug:
299
- print(f"{name} full shape: {shape} unpartitioned numel {unpartitioned_numel} ")
300
- state_dict[name] = full_single_fp32_vector.narrow(0, offset, unpartitioned_numel).view(shape)
301
- offset += unpartitioned_numel
302
-
303
- # Z2 started to align to 2*world_size to improve nccl performance. Therefore both offset and
304
- # avail_numel can differ by anywhere between 0..2*world_size. Due to two unrelated complex
305
- # paddings performed in the code it's almost impossible to predict the exact numbers w/o the
306
- # live optimizer object, so we are checking that the numbers are within the right range
307
- align_to = 2 * world_size
308
-
309
- def zero2_align(x):
310
- return align_to * math.ceil(x / align_to)
311
-
312
- if debug:
313
- print(f"original offset={offset}, avail_numel={avail_numel}")
314
-
315
- offset = zero2_align(offset)
316
- avail_numel = zero2_align(avail_numel)
317
-
318
- if debug:
319
- print(f"aligned offset={offset}, avail_numel={avail_numel}")
320
-
321
- # Sanity check
322
- if offset != avail_numel:
323
- raise ValueError(f"consumed {offset} numels out of {avail_numel} - something is wrong")
324
-
325
- print(f"Reconstructed fp32 state dict with {total_params} params {total_numel} elements")
326
-
327
-
328
- def _get_fp32_state_dict_from_zero2_checkpoint(world_size, fp32_flat_groups, zero_model_states):
329
- state_dict = OrderedDict()
330
-
331
- # buffers
332
- buffers = zero_model_states[0].buffers
333
- state_dict.update(buffers)
334
- if debug:
335
- print(f"added {len(buffers)} buffers")
336
-
337
- _zero2_merge_frozen_params(state_dict, zero_model_states)
338
-
339
- _zero2_merge_trainable_params(state_dict, world_size, fp32_flat_groups, zero_model_states)
340
-
341
- # recover shared parameters
342
- for pair in zero_model_states[0].shared_params:
343
- state_dict[pair[0]] = state_dict[pair[1]]
344
-
345
- return state_dict
346
-
347
-
348
- def zero3_partitioned_param_info(unpartitioned_numel, world_size):
349
- remainder = unpartitioned_numel % world_size
350
- padding_numel = (world_size - remainder) if remainder else 0
351
- partitioned_numel = math.ceil(unpartitioned_numel / world_size)
352
- return partitioned_numel, padding_numel
353
-
354
-
355
- def _zero3_merge_frozen_params(state_dict, world_size, zero_model_states):
356
- if zero_model_states[0].frozen_param_shapes is None or len(zero_model_states[0].frozen_param_shapes) == 0:
357
- return
358
-
359
- if debug:
360
- for i in range(world_size):
361
- num_elem = sum(s.numel() for s in zero_model_states[i].frozen_param_fragments.values())
362
- print(f'rank {i}: {FROZEN_PARAM_SHAPES}.numel = {num_elem}')
363
-
364
- frozen_param_shapes = zero_model_states[0].frozen_param_shapes
365
- wanted_params = len(frozen_param_shapes)
366
- wanted_numel = sum(s.numel() for s in frozen_param_shapes.values())
367
- avail_numel = sum([p.numel() for p in zero_model_states[0].frozen_param_fragments.values()]) * world_size
368
- print(f'Frozen params: Have {avail_numel} numels to process.')
369
- print(f'Frozen params: Need {wanted_numel} numels in {wanted_params} params')
370
-
371
- total_params = 0
372
- total_numel = 0
373
- for name, shape in zero_model_states[0].frozen_param_shapes.items():
374
- total_params += 1
375
- unpartitioned_numel = shape.numel()
376
- total_numel += unpartitioned_numel
377
-
378
- param_frags = tuple(model_state.frozen_param_fragments[name] for model_state in zero_model_states)
379
- state_dict[name] = torch.cat(param_frags, 0).narrow(0, 0, unpartitioned_numel).view(shape)
380
-
381
- partitioned_numel, partitioned_padding_numel = zero3_partitioned_param_info(unpartitioned_numel, world_size)
382
-
383
- if debug:
384
- print(
385
- f"Frozen params: {total_params} {name} full shape: {shape} partition0 numel={partitioned_numel} partitioned_padding_numel={partitioned_padding_numel}"
386
- )
387
-
388
- print(f"Reconstructed Frozen fp32 state dict with {total_params} params {total_numel} elements")
389
-
390
-
391
- def _zero3_merge_trainable_params(state_dict, world_size, fp32_flat_groups, zero_model_states):
392
- param_shapes = zero_model_states[0].param_shapes
393
- avail_numel = fp32_flat_groups[0].numel() * world_size
394
- # Reconstruction protocol: For zero3 we need to zip the partitions together at boundary of each
395
- # param, re-consolidating each param, while dealing with padding if any
396
-
397
- # merge list of dicts, preserving order
398
- param_shapes = {k: v for d in param_shapes for k, v in d.items()}
399
-
400
- if debug:
401
- for i in range(world_size):
402
- print(f"{FP32_FLAT_GROUPS}[{i}].shape={fp32_flat_groups[i].shape}")
403
-
404
- wanted_params = len(param_shapes)
405
- wanted_numel = sum(shape.numel() for shape in param_shapes.values())
406
- # not asserting if there is a mismatch due to possible padding
407
- avail_numel = fp32_flat_groups[0].numel() * world_size
408
- print(f"Trainable params: Have {avail_numel} numels to process.")
409
- print(f"Trainable params: Need {wanted_numel} numels in {wanted_params} params.")
410
-
411
- # params
412
- # XXX: for huge models that can't fit into the host's RAM we will have to recode this to support
413
- # out-of-core computing solution
414
- offset = 0
415
- total_numel = 0
416
- total_params = 0
417
- for name, shape in param_shapes.items():
418
-
419
- unpartitioned_numel = shape.numel()
420
- total_numel += unpartitioned_numel
421
- total_params += 1
422
-
423
- partitioned_numel, partitioned_padding_numel = zero3_partitioned_param_info(unpartitioned_numel, world_size)
424
-
425
- if debug:
426
- print(
427
- f"Trainable params: {total_params} {name} full shape: {shape} partition0 numel={partitioned_numel} partitioned_padding_numel={partitioned_padding_numel}"
428
- )
429
-
430
- # XXX: memory usage doubles here
431
- state_dict[name] = torch.cat(
432
- tuple(fp32_flat_groups[i].narrow(0, offset, partitioned_numel) for i in range(world_size)),
433
- 0).narrow(0, 0, unpartitioned_numel).view(shape)
434
- offset += partitioned_numel
435
-
436
- offset *= world_size
437
-
438
- # Sanity check
439
- if offset != avail_numel:
440
- raise ValueError(f"consumed {offset} numels out of {avail_numel} - something is wrong")
441
-
442
- print(f"Reconstructed Trainable fp32 state dict with {total_params} params {total_numel} elements")
443
-
444
-
445
- def _get_fp32_state_dict_from_zero3_checkpoint(world_size, fp32_flat_groups, zero_model_states):
446
- state_dict = OrderedDict()
447
-
448
- # buffers
449
- buffers = zero_model_states[0].buffers
450
- state_dict.update(buffers)
451
- if debug:
452
- print(f"added {len(buffers)} buffers")
453
-
454
- _zero3_merge_frozen_params(state_dict, world_size, zero_model_states)
455
-
456
- _zero3_merge_trainable_params(state_dict, world_size, fp32_flat_groups, zero_model_states)
457
-
458
- # recover shared parameters
459
- for pair in zero_model_states[0].shared_params:
460
- state_dict[pair[0]] = state_dict[pair[1]]
461
-
462
- return state_dict
463
-
464
-
465
- def get_fp32_state_dict_from_zero_checkpoint(checkpoint_dir, tag=None):
466
- """
467
- Convert ZeRO 2 or 3 checkpoint into a single fp32 consolidated state_dict that can be loaded with
468
- ``load_state_dict()`` and used for training without DeepSpeed or shared with others, for example
469
- via a model hub.
470
-
471
- Args:
472
- - ``checkpoint_dir``: path to the desired checkpoint folder
473
- - ``tag``: checkpoint tag used as a unique identifier for checkpoint. If not provided will attempt to load tag in 'latest' file. e.g., ``global_step14``
474
-
475
- Returns:
476
- - pytorch ``state_dict``
477
-
478
- Note: this approach may not work if your application doesn't have sufficient free CPU memory and
479
- you may need to use the offline approach using the ``zero_to_fp32.py`` script that is saved with
480
- the checkpoint.
481
-
482
- A typical usage might be ::
483
-
484
- from deepspeed.utils.zero_to_fp32 import get_fp32_state_dict_from_zero_checkpoint
485
- # do the training and checkpoint saving
486
- state_dict = get_fp32_state_dict_from_zero_checkpoint(checkpoint_dir) # already on cpu
487
- model = model.cpu() # move to cpu
488
- model.load_state_dict(state_dict)
489
- # submit to model hub or save the model to share with others
490
-
491
- In this example the ``model`` will no longer be usable in the deepspeed context of the same
492
- application. i.e. you will need to re-initialize the deepspeed engine, since
493
- ``model.load_state_dict(state_dict)`` will remove all the deepspeed magic from it.
494
-
495
- If you want it all done for you, use ``load_state_dict_from_zero_checkpoint`` instead.
496
-
497
- """
498
- if tag is None:
499
- latest_path = os.path.join(checkpoint_dir, 'latest')
500
- if os.path.isfile(latest_path):
501
- with open(latest_path, 'r') as fd:
502
- tag = fd.read().strip()
503
- else:
504
- raise ValueError(f"Unable to find 'latest' file at {latest_path}")
505
-
506
- ds_checkpoint_dir = os.path.join(checkpoint_dir, tag)
507
-
508
- if not os.path.isdir(ds_checkpoint_dir):
509
- raise FileNotFoundError(f"Directory '{ds_checkpoint_dir}' doesn't exist")
510
-
511
- return _get_fp32_state_dict_from_zero_checkpoint(ds_checkpoint_dir)
512
-
513
-
514
- def convert_zero_checkpoint_to_fp32_state_dict(checkpoint_dir, output_file, tag=None):
515
- """
516
- Convert ZeRO 2 or 3 checkpoint into a single fp32 consolidated ``state_dict`` file that can be
517
- loaded with ``torch.load(file)`` + ``load_state_dict()`` and used for training without DeepSpeed.
518
-
519
- Args:
520
- - ``checkpoint_dir``: path to the desired checkpoint folder. (one that contains the tag-folder, like ``global_step14``)
521
- - ``output_file``: path to the pytorch fp32 state_dict output file (e.g. path/pytorch_model.bin)
522
- - ``tag``: checkpoint tag used as a unique identifier for checkpoint. If not provided will attempt to load tag in the file named ``latest`` in the checkpoint folder, e.g., ``global_step14``
523
- """
524
-
525
- state_dict = get_fp32_state_dict_from_zero_checkpoint(checkpoint_dir, tag)
526
- print(f"Saving fp32 state dict to {output_file}")
527
- torch.save(state_dict, output_file)
528
-
529
-
530
- def load_state_dict_from_zero_checkpoint(model, checkpoint_dir, tag=None):
531
- """
532
- 1. Put the provided model to cpu
533
- 2. Convert ZeRO 2 or 3 checkpoint into a single fp32 consolidated ``state_dict``
534
- 3. Load it into the provided model
535
-
536
- Args:
537
- - ``model``: the model object to update
538
- - ``checkpoint_dir``: path to the desired checkpoint folder. (one that contains the tag-folder, like ``global_step14``)
539
- - ``tag``: checkpoint tag used as a unique identifier for checkpoint. If not provided will attempt to load tag in the file named ``latest`` in the checkpoint folder, e.g., ``global_step14``
540
-
541
- Returns:
542
- - ``model`: modified model
543
-
544
- Make sure you have plenty of CPU memory available before you call this function. If you don't
545
- have enough use the ``zero_to_fp32.py`` utility to do the conversion. You will find it
546
- conveniently placed for you in the checkpoint folder.
547
-
548
- A typical usage might be ::
549
-
550
- from deepspeed.utils.zero_to_fp32 import load_state_dict_from_zero_checkpoint
551
- model = load_state_dict_from_zero_checkpoint(trainer.model, checkpoint_dir)
552
- # submit to model hub or save the model to share with others
553
-
554
- Note, that once this was run, the ``model`` will no longer be usable in the deepspeed context
555
- of the same application. i.e. you will need to re-initialize the deepspeed engine, since
556
- ``model.load_state_dict(state_dict)`` will remove all the deepspeed magic from it.
557
-
558
- """
559
- logger.info(f"Extracting fp32 weights")
560
- state_dict = get_fp32_state_dict_from_zero_checkpoint(checkpoint_dir, tag)
561
-
562
- logger.info(f"Overwriting model with fp32 weights")
563
- model = model.cpu()
564
- model.load_state_dict(state_dict, strict=False)
565
-
566
- return model
567
-
568
-
569
- if __name__ == "__main__":
570
-
571
- parser = argparse.ArgumentParser()
572
- parser.add_argument("checkpoint_dir",
573
- type=str,
574
- help="path to the desired checkpoint folder, e.g., path/checkpoint-12")
575
- parser.add_argument(
576
- "output_file",
577
- type=str,
578
- help="path to the pytorch fp32 state_dict output file (e.g. path/checkpoint-12/pytorch_model.bin)")
579
- parser.add_argument("-d", "--debug", action='store_true', help="enable debug")
580
- args = parser.parse_args()
581
-
582
- debug = args.debug
583
-
584
- convert_zero_checkpoint_to_fp32_state_dict(args.checkpoint_dir, args.output_file)