wehub-resource-sync
50 lines
1.0 KiB
Python
50 lines
1.0 KiB
Python
# coding: utf-8
|
|
|
|
import os
|
|
import torch
|
|
import torch.distributed as dist
|
|
|
|
def get_global_rank() -> int:
|
|
"""
|
|
Get the global rank, the global index of the GPU.
|
|
"""
|
|
return int(os.environ.get("RANK", "0"))
|
|
|
|
|
|
def get_local_rank() -> int:
|
|
"""
|
|
Get the local rank, the local index of the GPU.
|
|
"""
|
|
return int(os.environ.get("LOCAL_RANK", "0"))
|
|
|
|
|
|
def get_world_size() -> int:
|
|
"""
|
|
Get the world size, the total amount of GPUs.
|
|
"""
|
|
return int(os.environ.get("WORLD_SIZE", "1"))
|
|
|
|
|
|
def is_master():
|
|
"""
|
|
Check if the current process is the master process (rank 0).
|
|
"""
|
|
if not dist.is_available() or not dist.is_initialized():
|
|
return True
|
|
return dist.get_rank() == 0
|
|
|
|
|
|
def get_device() -> torch.device:
|
|
"""
|
|
Get current rank device.
|
|
"""
|
|
return torch.device("cuda", get_local_rank())
|
|
|
|
|
|
def barrier_if_distributed(*args, **kwargs):
|
|
"""
|
|
Synchronizes all processes if under distributed context.
|
|
"""
|
|
if dist.is_initialized():
|
|
return dist.barrier(*args, **kwargs)
|