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Fixed the issue that universal checkpoint cannot be loaded for stage3 when world size expansion. #7599

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Fixed the issue that universal checkpoint cannot be loaded for stage3 when world size expansion. #7599

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1b29e29
Fixed the issue that universal checkpoint cannot be loaded for stage3…
zhengchenyu Sep 28, 2025
707a1d0
fix load checkpoint when disable univeral
zhengchenyu Sep 29, 2025
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19 changes: 12 additions & 7 deletions deepspeed/runtime/engine.py
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Original file line number Diff line number Diff line change
Expand Up @@ -3004,15 +3004,20 @@ def _get_zero_ckpt_name(self, checkpoints_path, tag):
bf16_mode = self.bfloat16_enabled()
return self._get_rank_zero_ckpt_name(checkpoints_path, tag, mp_rank, pp_rank, bf16_mode)

def _get_ckpt_name(self, checkpoints_path, tag, mp_placeholder=None):
def _get_ckpt_name(self, checkpoints_path, tag, mp_placeholder=None, pp_placeholder=None):
if mp_placeholder is not None:
mp_rank_str = mp_placeholder
else:
mp_rank = 0 if self.mpu is None else self.mpu.get_model_parallel_rank()
mp_rank_str = f"{mp_rank:02d}"

if self.zero_optimization_partition_weights():
filename = "zero_pp_rank_{}".format(dist.get_rank(group=self.optimizer.dp_process_group))
if pp_placeholder is not None:
pp_rank = pp_placeholder
else:
pp_rank = dist.get_rank(group=self.optimizer.dp_process_group)

filename = "zero_pp_rank_{}".format(pp_rank)
ckpt_name = os.path.join(
checkpoints_path,
str(tag),
Expand Down Expand Up @@ -3047,15 +3052,15 @@ def _get_expert_ckpt_name(checkpoints_path, layer_id, expert_id, tag, mpu=None):

def _get_all_ckpt_names(self, checkpoints_path, tag):
# It is required that (checkpoints_path, tag) are consistent among all ranks.
ckpt_file_pattern = self._get_ckpt_name(checkpoints_path, tag, mp_placeholder="*")
ckpt_file_pattern = self._get_ckpt_name(checkpoints_path,
tag,
mp_placeholder="*",
pp_placeholder="0" if self.load_universal_checkpoint() else None)
import glob

ckpt_files = glob.glob(ckpt_file_pattern)
ckpt_files.sort()
if self.load_universal_checkpoint():
return [ckpt_files[0]]
else:
return ckpt_files
return ckpt_files

def load_checkpoint(self,
load_dir,
Expand Down