File size: 1,966 Bytes
d596074 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 | # Copyright 2021 Xiaomi Corp. (authors: Fangjun Kuang)
#
# See ../../LICENSE for clarification regarding multiple authors
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
import os
import torch
from torch import distributed as dist
def setup_dist(
rank=None, world_size=None, master_port=None, use_ddp_launch=False, master_addr=None
):
"""
rank and world_size are used only if use_ddp_launch is False.
"""
if "MASTER_ADDR" not in os.environ:
os.environ["MASTER_ADDR"] = (
"localhost" if master_addr is None else str(master_addr)
)
if "MASTER_PORT" not in os.environ:
os.environ["MASTER_PORT"] = "12354" if master_port is None else str(master_port)
if use_ddp_launch is False:
dist.init_process_group("nccl", rank=rank, world_size=world_size)
torch.cuda.set_device(rank)
else:
dist.init_process_group("nccl")
def cleanup_dist():
dist.destroy_process_group()
def get_world_size():
if "WORLD_SIZE" in os.environ:
return int(os.environ["WORLD_SIZE"])
if dist.is_available() and dist.is_initialized():
return dist.get_world_size()
else:
return 1
def get_rank():
if "RANK" in os.environ:
return int(os.environ["RANK"])
elif dist.is_available() and dist.is_initialized():
return dist.get_rank()
else:
return 0
def get_local_rank():
return int(os.environ.get("LOCAL_RANK", 0))
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