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Fix memory leak for pipelined optimizer swapper #5700

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Jul 15, 2024
Merged

Fix memory leak for pipelined optimizer swapper #5700

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3 changes: 3 additions & 0 deletions deepspeed/runtime/swap_tensor/pipelined_optimizer_swapper.py
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Original file line number Diff line number Diff line change
Expand Up @@ -8,6 +8,7 @@

from deepspeed.ops.op_builder import AsyncIOBuilder
from deepspeed import comm as dist
import torch

from deepspeed.runtime.swap_tensor.constants import *
from deepspeed.runtime.swap_tensor.utils import swap_in_tensors, swap_out_tensors, print_object
Expand Down Expand Up @@ -154,6 +155,8 @@ def swap_out_gradients(self, parameter, gradient_offsets, gradient_tensors):

def _complete_swap_out(self, swap_out_type):
self.swap_ops[swap_out_type].wait()
for buffer in self.swap_ops[swap_out_type].state_buffers:
buffer = torch.Tensor()
self.swap_buffer_manager.free(self.swap_ops[swap_out_type].allocated_buffers)
self.swap_ops[swap_out_type] = None

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