

#
# This a `torch.distributed` diagnostics script that checks that all GPUs in the cluster (one or
# many nodes) can talk to each other via nccl and allocate gpu memory.
#
# To run first adjust the number of processes and nodes:
#
# python -m torch.distributed.run --nproc_per_node 2 --nnodes 1 torch-distributed-gpu-test.py
#
# You may need to add --master_addr $MASTER_ADDR --master_port $MASTER_PORT if using a custom addr:port
#
# You can also use the rdzv API: --rdzv_endpoint $MASTER_ADDR:$MASTER_PORT --rdzv_backend c10d
#
# use torch.distributed.launch instead of torch.distributed.run for torch < 1.9
#
# If you get a hanging in `barrier` calls you have some network issues, you may try to debug this with:
#
# NCCL_DEBUG=INFO python -m torch.distributed.run --nproc_per_node 2 --nnodes 1 torch-distributed-gpu-test.py
#
# which should tell you what's going on behind the scenes.
#
#
# This script can be run via `srun` in the SLURM environment as well. Here is a SLURM script that
# runs on 2 nodes of 4 gpus per node:
#
# #SBATCH --job-name=test-nodes        # name
# #SBATCH --nodes=2                    # nodes
# #SBATCH --ntasks-per-node=1          # crucial - only 1 task per dist per node!
# #SBATCH --cpus-per-task=10           # number of cores per tasks
# #SBATCH --gres=gpu:4                 # number of gpus
# #SBATCH --time 0:05:00               # maximum execution time (HH:MM:SS)
# #SBATCH --output=%x-%j.out           # output file name
#
# GPUS_PER_NODE=4
# MASTER_ADDR=$(scontrol show hostnames $SLURM_JOB_NODELIST | head -n 1)
# MASTER_PORT=6000
#
# srun --jobid $SLURM_JOBID bash -c 'python -m torch.distributed.run \
# --nproc_per_node $GPUS_PER_NODE --nnodes $SLURM_NNODES --node_rank $SLURM_PROCID \
# --master_addr $MASTER_ADDR --master_port $MASTER_PORT \
# torch-distributed-gpu-test.py'
#

import fcntl
import os
import socket

import torch
import torch.distributed as dist




def 			UpperCAmelCase__				(			*_A      : Any							):





  '''simple docstring'''







  with open(_A	,      '''r'''							) as fh:
    fcntl.flock(_A	,      fcntl.LOCK_EX							)
    try:
      print(*_A							)
    finally:
      fcntl.flock(_A	,      fcntl.LOCK_UN							)


lowerCamelCase           =					int(os.environ['''LOCAL_RANK'''])
torch.cuda.set_device(local_rank)
lowerCamelCase           =					torch.device('''cuda''', local_rank)
lowerCamelCase           =					socket.gethostname()

lowerCamelCase           =					f"""[{hostname}-{local_rank}]"""

try:
       # test distributed
       dist.init_process_group('''nccl''')
       dist.all_reduce(torch.ones(1).to(device), op=dist.ReduceOp.SUM)
       dist.barrier()

       # test cuda is available and can allocate memory
       torch.cuda.is_available()
       torch.ones(1).cuda(local_rank)

       # global rank
       lowerCamelCase           =					dist.get_rank()
       lowerCamelCase           =					dist.get_world_size()

       printflock(f"""{gpu} is OK (global rank: {rank}/{world_size})""")

       dist.barrier()
       if rank == 0:
              printflock(f"""pt={torch.__version__}, cuda={torch.version.cuda}, nccl={torch.cuda.nccl.version()}""")

except Exception:
       printflock(f"""{gpu} is broken""")
       raise



import os
import string
import sys


lowerCamelCase           =					1 << 8

lowerCamelCase           =					{
    '''tab''': ord('''\t'''),
    '''newline''': ord('''\r'''),
    '''esc''': 27,
    '''up''': 65 + ARROW_KEY_FLAG,
    '''down''': 66 + ARROW_KEY_FLAG,
    '''right''': 67 + ARROW_KEY_FLAG,
    '''left''': 68 + ARROW_KEY_FLAG,
    '''mod_int''': 91,
    '''undefined''': sys.maxsize,
    '''interrupt''': 3,
    '''insert''': 50,
    '''delete''': 51,
    '''pg_up''': 53,
    '''pg_down''': 54,
}

lowerCamelCase           =					KEYMAP['''up''']
lowerCamelCase           =					KEYMAP['''left''']

if sys.platform == "win32":
       lowerCamelCase           =					[]
       lowerCamelCase           =					{
           b'''\xe0H''': KEYMAP['''up'''] - ARROW_KEY_FLAG,
           b'''\x00H''': KEYMAP['''up'''] - ARROW_KEY_FLAG,
           b'''\xe0P''': KEYMAP['''down'''] - ARROW_KEY_FLAG,
           b'''\x00P''': KEYMAP['''down'''] - ARROW_KEY_FLAG,
           b'''\xe0M''': KEYMAP['''right'''] - ARROW_KEY_FLAG,
           b'''\x00M''': KEYMAP['''right'''] - ARROW_KEY_FLAG,
           b'''\xe0K''': KEYMAP['''left'''] - ARROW_KEY_FLAG,
           b'''\x00K''': KEYMAP['''left'''] - ARROW_KEY_FLAG,
       }

for i in range(10):
       lowerCamelCase           =					ord(str(i))




def 			UpperCAmelCase__				(			):





  '''simple docstring'''







  if os.name == "nt":
    import msvcrt

    a__  ='''mbcs'''
    # Flush the keyboard buffer
    while msvcrt.kbhit():
      msvcrt.getch()
    if len(_A							) == 0:
      # Read the keystroke
      a__  =msvcrt.getch()

      # If it is a prefix char, get second part
      if ch in (b"\x00", b"\xe0"):
        a__  =ch + msvcrt.getch()
        # Translate actual Win chars to bullet char types
        try:
          a__  =chr(WIN_KEYMAP[cha]							)
          WIN_CH_BUFFER.append(chr(KEYMAP['''mod_int''']							)							)
          WIN_CH_BUFFER.append(_A							)
          if ord(_A							) in (
              KEYMAP["insert"] - 1 << 9,
              KEYMAP["delete"] - 1 << 9,
              KEYMAP["pg_up"] - 1 << 9,
              KEYMAP["pg_down"] - 1 << 9,
          ):
            WIN_CH_BUFFER.append(chr(1_26							)							)
          a__  =chr(KEYMAP['''esc''']							)
        except KeyError:
          a__  =cha[1]
      else:
        a__  =ch.decode(_A							)
    else:
      a__  =WIN_CH_BUFFER.pop(0							)
  elif os.name == "posix":
    import termios
    import tty

    a__  =sys.stdin.fileno()
    a__  =termios.tcgetattr(_A							)
    try:
      tty.setraw(_A							)
      a__  =sys.stdin.read(1							)
    finally:
      termios.tcsetattr(_A	,      termios.TCSADRAIN	,      _A							)
  return ch




def 			UpperCAmelCase__				(			):





  '''simple docstring'''







  a__  =get_raw_chars()
  if ord(_A							) in [KEYMAP["interrupt"], KEYMAP["newline"]]:
    return char

  elif ord(_A							) == KEYMAP["esc"]:
    a__  =get_raw_chars()
    if ord(_A							) == KEYMAP["mod_int"]:
      a__  =get_raw_chars()
      if ord(_A							) >= KEYMAP["arrow_begin"] - ARROW_KEY_FLAG and ord(_A							) <= KEYMAP["arrow_end"] - ARROW_KEY_FLAG:
        return chr(ord(_A							) + ARROW_KEY_FLAG							)
      else:
        return KEYMAP["undefined"]
    else:
      return get_raw_chars()

  else:
    if char in string.printable:
      return char
    else:
      return KEYMAP["undefined"]
