Python torch.multiprocessing方法代碼示例

# 需要導入模塊: import torch [as 別名]
# 或者: from torch import multiprocessing [as 別名]
def main():

    if cfg.gpu is not None:
        warnings.warn('You have chosen a specific GPU. This will completely '
                      'disable data parallelism.')

    if cfg.dist_url == "env://" and cfg.world_size == -1:
        cfg.world_size = int(os.environ["WORLD_SIZE"])

    cfg.distributed = cfg.world_size > 1 or cfg.multiprocessing_distributed

    ngpus_per_node = torch.cuda.device_count()
    if cfg.multiprocessing_distributed:
        # Since we have ngpus_per_node processes per node, the total world_size
        # needs to be adjusted accordingly
        cfg.world_size = ngpus_per_node * cfg.world_size
        # Use torch.multiprocessing.spawn to launch distributed processes: the
        # main_worker process function
        mp.spawn(main_worker, nprocs=ngpus_per_node, args=(ngpus_per_node, cfg))
    else:
        # Simply call main_worker function
        main_worker(cfg.gpu, ngpus_per_node, cfg) 

# 需要導入模塊: import torch [as 別名]
# 或者: from torch import multiprocessing [as 別名]
def set_cuda_id(spec):
    '''Use trial and session id to hash and modulo cuda device count for a cuda_id to maximize device usage. Sets the net_spec for the base Net class to pick up.'''
    # Don't trigger any cuda call if not using GPU. Otherwise will break multiprocessing on machines with CUDA.
    # see issues https://github.com/pytorch/pytorch/issues/334 https://github.com/pytorch/pytorch/issues/3491 https://github.com/pytorch/pytorch/issues/9996
    for agent_spec in spec['agent']:
        if 'net' not in agent_spec or not agent_spec['net'].get('gpu'):
            return
    meta_spec = spec['meta']
    trial_idx = meta_spec['trial'] or 0
    session_idx = meta_spec['session'] or 0
    if meta_spec['distributed'] == 'shared':  # shared hogwild uses only global networks, offset them to idx 0
        session_idx = 0
    job_idx = trial_idx * meta_spec['max_session'] + session_idx
    job_idx += meta_spec['cuda_offset']
    device_count = torch.cuda.device_count()
    cuda_id = None if not device_count else job_idx % device_count

    for agent_spec in spec['agent']:
        agent_spec['net']['cuda_id'] = cuda_id 

# 需要導入模塊: import torch [as 別名]
# 或者: from torch import multiprocessing [as 別名]
def _dataset_from_chunk(cls, chunk, processor):
        """
        Creating a dataset for a chunk (= subset) of dicts. In multiprocessing:
          * we read in all dicts from a file
          * split all dicts into chunks
          * feed *one chunk* to *one process*
          => the *one chunk*  gets converted to *one dataset* (that's what we do here)
          * all datasets get collected and concatenated
        :param chunk: Instead of only having a list of dicts here we also supply an index (ascending int) for each.
            => [(0, dict), (1, dict) ...]
        :type chunk: list of tuples
        :param processor: FARM Processor (e.g. TextClassificationProcessor)
        :return: PyTorch Dataset
        """
        dicts = [d[1] for d in chunk]
        indices = [x[0] for x in chunk]
        dataset = processor.dataset_from_dicts(dicts=dicts, indices=indices)
        return dataset 

# 需要導入模塊: import torch [as 別名]
# 或者: from torch import multiprocessing [as 別名]
def set_cuda_id(spec):
    '''Use trial and session id to hash and modulo cuda device count for a cuda_id to maximize device usage. Sets the net_spec for the base Net class to pick up.'''
    # Don't trigger any cuda call if not using GPU. Otherwise will break multiprocessing on machines with CUDA.
    # see issues https://github.com/pytorch/pytorch/issues/334 https://github.com/pytorch/pytorch/issues/3491 https://github.com/pytorch/pytorch/issues/9996
    for agent_spec in spec['agent']:
        if not agent_spec['net'].get('gpu'):
            return
    meta_spec = spec['meta']
    trial_idx = meta_spec['trial'] or 0
    session_idx = meta_spec['session'] or 0
    if meta_spec['distributed'] == 'shared':  # shared hogwild uses only global networks, offset them to idx 0
        session_idx = 0
    job_idx = trial_idx * meta_spec['max_session'] + session_idx
    job_idx += meta_spec['cuda_offset']
    device_count = torch.cuda.device_count()
    cuda_id = job_idx % device_count if torch.cuda.is_available() else None

    for agent_spec in spec['agent']:
        agent_spec['net']['cuda_id'] = cuda_id 

# 需要導入模塊: import torch [as 別名]
# 或者: from torch import multiprocessing [as 別名]
def __init__(self, loader):
        self.dataset = loader.dataset
        self.collate_fn = loader.collate_fn
        self.batch_sampler = loader.batch_sampler
        self.num_workers = loader.num_workers
        self.pin_memory = loader.pin_memory
        self.done_event = threading.Event()

        self.sample_iter = iter(self.batch_sampler)

        if self.num_workers > 0:
            self.index_queue = multiprocessing.Queue()
            self.data_queue = multiprocessing.Queue()
            self.batches_outstanding = 0
            self.shutdown = False
            self.send_idx = 0
            self.rcvd_idx = 0
            self.reorder_dict = {}

            self.workers = [
                multiprocessing.Process(
                    target=_worker_loop,
                    args=(self.dataset, self.index_queue, self.data_queue, self.collate_fn))
                for _ in range(self.num_workers)]

            for w in self.workers:
                w.daemon = True  # ensure that the worker exits on process exit
                w.start()

            # prime the prefetch loop
            for _ in range(2 * self.num_workers):
                self._put_indices() 

# 需要導入模塊: import torch [as 別名]
# 或者: from torch import multiprocessing [as 別名]
def __init__(self, dataset, batch_size=1, shuffle=False, sampler=None, batch_sampler=None,
                 num_workers=0, collate_fn=default_collate, pin_memory=False, drop_last=False,
                 timeout=0, worker_init_fn=None):
        self.dataset = dataset
        self.batch_size = batch_size
        self.num_workers = num_workers
        self.collate_fn = collate_fn
        self.pin_memory = pin_memory
        self.drop_last = drop_last
        self.timeout = timeout
        self.worker_init_fn = worker_init_fn

        if timeout < 0:
            raise ValueError('timeout option should be non-negative')

        if batch_sampler is not None:
            if batch_size > 1 or shuffle or sampler is not None or drop_last:
                raise ValueError('batch_sampler is mutually exclusive with '
                                 'batch_size, shuffle, sampler, and drop_last')

        if sampler is not None and shuffle:
            raise ValueError('sampler is mutually exclusive with shuffle')

        if self.num_workers < 0:
            raise ValueError('num_workers cannot be negative; '
                             'use num_workers=0 to disable multiprocessing.')

        if batch_sampler is None:
            if sampler is None:
                if shuffle:
                    sampler = RandomSampler(dataset)
                else:
                    sampler = SequentialSampler(dataset)
            batch_sampler = BatchSampler(sampler, batch_size, drop_last)

        self.sampler = sampler
        self.batch_sampler = batch_sampler 

# 需要導入模塊: import torch [as 別名]
# 或者: from torch import multiprocessing [as 別名]
def thread_wrapped_func(func):
    """Wrapped func for torch.multiprocessing.Process.
    With this wrapper we can use OMP threads in subprocesses
    otherwise, OMP_NUM_THREADS=1 is mandatory.
    How to use:
    @thread_wrapped_func
    def func_to_wrap(args ...):
    """
    @wraps(func)
    def decorated_function(*args, **kwargs):
        queue = mp.Queue()
        def _queue_result():
            exception, trace, res = None, None, None
            try:
                res = func(*args, **kwargs)
            except Exception as e:
                exception = e
                trace = traceback.format_exc()
            queue.put((res, exception, trace))

        start_new_thread(_queue_result, ())
        result, exception, trace = queue.get()
        if exception is None:
            return result
        else:
            assert isinstance(exception, Exception)
            raise exception.__class__(trace)
    return decorated_function 

# 需要導入模塊: import torch [as 別名]
# 或者: from torch import multiprocessing [as 別名]
def __init__(self, loader):
        self.dataset = loader.dataset
        self.collate_fn = loader.collate_fn
        self.batch_sampler = loader.batch_sampler
        self.num_workers = loader.num_workers
        self.pin_memory = loader.pin_memory
        self.done_event = threading.Event()

        self.sample_iter = iter(self.batch_sampler)

        if self.num_workers > 0:
            self.index_queue = multiprocessing.SimpleQueue()
            self.data_queue = multiprocessing.SimpleQueue()
            self.batches_outstanding = 0
            self.shutdown = False
            self.send_idx = 0
            self.rcvd_idx = 0
            self.reorder_dict = {}

            self.workers = [
                multiprocessing.Process(
                    target=_worker_loop,
                    args=(self.dataset, self.index_queue, self.data_queue, self.collate_fn, np.random.randint(0, 4294967296, dtype='uint32')))
                for _ in range(self.num_workers)]

            for w in self.workers:
                w.daemon = True  # ensure that the worker exits on process exit
                w.start()

            if self.pin_memory:
                in_data = self.data_queue
                self.data_queue = queue.Queue()
                self.pin_thread = threading.Thread(
                    target=_pin_memory_loop,
                    args=(in_data, self.data_queue, self.done_event))
                self.pin_thread.daemon = True
                self.pin_thread.start()

            # prime the prefetch loop
            for _ in range(2 * self.num_workers):
                self._put_indices() 

# 需要導入模塊: import torch [as 別名]
# 或者: from torch import multiprocessing [as 別名]
def main():
    args = parser.parse_args()
    if(not os.path.exists(os.path.join(args.save_folder, args.dataset, args.network))):
        os.makedirs(os.path.join(args.save_folder, args.dataset, args.network))
    if args.seed is not None:
        random.seed(args.seed)
        torch.manual_seed(args.seed)
        cudnn.deterministic = True
        warnings.warn('You have chosen to seed training. '
                      'This will turn on the CUDNN deterministic setting, '
                      'which can slow down your training considerably! '
                      'You may see unexpected behavior when restarting '
                      'from checkpoints.')

    if args.gpu is not None:
        warnings.warn('You have chosen a specific GPU. This will completely '
                      'disable data parallelism.')
    os.environ['MASTER_ADDR'] = 'localhost'
    os.environ['MASTER_PORT'] = '12355'
    os.environ['WORLD_SIZE'] = '2'
    if args.dist_url == "env://" and args.world_size == -1:
        args.world_size = int(os.environ["WORLD_SIZE"])

    args.distributed = args.world_size > 1 or args.multiprocessing_distributed
    ngpus_per_node = torch.cuda.device_count()
    if args.multiprocessing_distributed:
        # Since we have ngpus_per_node processes per node, the total world_size
        # needs to be adjusted accordingly
        args.world_size = ngpus_per_node * args.world_size
        # Use torch.multiprocessing.spawn to launch distributed processes: the
        # main_worker process function
        mp.spawn(main_worker, nprocs=ngpus_per_node,
                 args=(ngpus_per_node, args))
    else:
        # Simply call main_worker function
        main_worker(args.gpu, ngpus_per_node, args) 

# 需要導入模塊: import torch [as 別名]
# 或者: from torch import multiprocessing [as 別名]
def run_in_process_group(world_size, filename, fn, inputs):
    if torch.distributed.is_initialized():
        torch.distributed.destroy_process_group()
    processes = []
    q = Queue()
    wait_event = Event()

    # run the remaining processes
    # for rank in range(world_size - 1):
    for rank in range(world_size):
        p = Process(
            target=init_and_run_process,
            args=(rank, world_size, filename, fn, inputs[rank], q, wait_event),
        )
        p.start()
        processes.append(p)

    # fetch the results from the queue before joining, the background processes
    # need to be alive if the queue contains tensors. See
    # https://discuss.pytorch.org/t/using-torch-tensor-over-multiprocessing-queue-process-fails/2847/3  # noqa: B950
    results = []
    for _ in range(len(processes)):
        results.append(q.get())

    wait_event.set()

    for p in processes:
        p.join()
    return results 

# 需要導入模塊: import torch [as 別名]
# 或者: from torch import multiprocessing [as 別名]
def main():
    _A = parser.parse_args()
    random.seed(_A.seed)
    torch.manual_seed(_A.seed)
    cudnn.deterministic = True

    _A.world_size = torch.cuda.device_count()
    # Use torch.multiprocessing.spawn to launch distributed processes: the
    # main_worker process function
    mp.spawn(main_worker, nprocs=_A.world_size, args=(_A.world_size, _A)) 

# 需要導入模塊: import torch [as 別名]
# 或者: from torch import multiprocessing [as 別名]
def __init__(self, loader):
        self.dataset = loader.dataset
        self.collate_fn = loader.collate_fn
        self.batch_sampler = loader.batch_sampler
        self.num_workers = loader.num_workers
        self.pin_memory = loader.pin_memory
        self.done_event = threading.Event()

        self.sample_iter = iter(self.batch_sampler)

        if self.num_workers > 0:
            self.index_queue = multiprocessing.SimpleQueue()
            self.data_queue = multiprocessing.SimpleQueue()
            self.batches_outstanding = 0
            self.shutdown = False
            self.send_idx = 0
            self.rcvd_idx = 0
            self.reorder_dict = {}

            self.workers = [
                multiprocessing.Process(
                    target=_worker_loop,
                    args=(self.dataset, self.index_queue, self.data_queue, self.collate_fn))
                for _ in range(self.num_workers)]

            for w in self.workers:
                w.daemon = True  # ensure that the worker exits on process exit
                w.start()

            if self.pin_memory:
                in_data = self.data_queue
                self.data_queue = queue.Queue()
                self.pin_thread = threading.Thread(
                    target=_pin_memory_loop,
                    args=(in_data, self.data_queue, self.done_event))
                self.pin_thread.daemon = True
                self.pin_thread.start()

            # prime the prefetch loop
            for _ in range(2 * self.num_workers):
                self._put_indices() 

# 需要導入模塊: import torch [as 別名]
# 或者: from torch import multiprocessing [as 別名]
def main():
    args = parser.parse_args()

    if args.seed is not None:
        random.seed(args.seed)
        torch.manual_seed(args.seed)
        if not args.cpu:
            cudnn.deterministic = True
        warnings.warn('You have chosen to seed training. '
                      'This will turn on the CUDNN deterministic setting, '
                      'which can slow down your training considerably! '
                      'You may see unexpected behavior when restarting '
                      'from checkpoints.')

    if args.gpu is not None:
        warnings.warn('You have chosen a specific GPU. This will completely '
                      'disable data parallelism.')

    if args.dist_url == "env://" and args.world_size == -1:
        args.world_size = int(os.environ["WORLD_SIZE"])

    args.distributed = args.world_size > 1 or args.multiprocessing_distributed

    ngpus_per_node = torch.cuda.device_count()
    if args.multiprocessing_distributed:
        # Since we have ngpus_per_node processes per node, the total world_size
        # needs to be adjusted accordingly
        args.world_size = ngpus_per_node * args.world_size
        # Use torch.multiprocessing.spawn to launch distributed processes: the
        # main_worker process function
        mp.spawn(main_worker, nprocs=ngpus_per_node, args=(ngpus_per_node, args))
    else:
        # Simply call main_worker function
        main_worker(args.gpu, ngpus_per_node, args) 

# 需要導入模塊: import torch [as 別名]
# 或者: from torch import multiprocessing [as 別名]
def main():
    if args.seed is not None:
        random.seed(args.seed)
        torch.manual_seed(args.seed)
        cudnn.deterministic = True
        warnings.warn('You have chosen to seed training. '
                      'This will turn on the CUDNN deterministic setting, '
                      'which can slow down your training considerably! '
                      'You may see unexpected behavior when restarting '
                      'from checkpoints.')

    if args.gpu is not None:
        warnings.warn('You have chosen a specific GPU. This will completely '
                      'disable data parallelism.')

    if args.dist_url == "env://" and args.world_size == -1:
        args.world_size = int(os.environ["WORLD_SIZE"])

    args.distributed = args.world_size > 1 or args.multiprocessing_distributed

    ngpus_per_node = torch.cuda.device_count()
    if args.multiprocessing_distributed:
        # Since we have ngpus_per_node processes per node, the total world_size
        # needs to be adjusted accordingly
        args.world_size = ngpus_per_node * args.world_size
        # Use torch.multiprocessing.spawn to launch distributed processes: the
        # main_worker process function
        mp.spawn(main_worker, nprocs=ngpus_per_node, args=(ngpus_per_node, args))
    else:
        # Simply call main_worker function
        main_worker(args.gpu, ngpus_per_node, args) 

# 需要導入模塊: import torch [as 別名]
# 或者: from torch import multiprocessing [as 別名]
def __init__(self, threadsafe=False, shared=None):
        self._threadsafe = threadsafe
        if self._threadsafe and shared is None:
            # Threadsafe metrics tracking works by keeping a queue that workers can
            # push updates to. the main worker works through the queue at report
            # time. We could add some buffering to improve performance, but we
            # are deprioritizing hogwild performance at this time.
            self._buffer = None
            self._queue = multiprocessing.SimpleQueue()
            self._worker = False
            self._data = {}
        elif shared and 'queue' in shared:
            # This is a clone, in threadsafe mode
            self._buffer = {}
            self._queue = shared['queue']
            self._worker = True
            self._data = None
        elif shared and 'data' in shared:
            # This is a clone, in non-threadsafe mode
            self._buffer = None
            self._queue = None
            self._worker = False
            self._data = shared['data']
        else:
            # The original in non-threadsafe mode
            self._buffer = None
            self._queue = None
            self._worker = False
            self._data = {}