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指标工具包

torcheval.metrics.toolkit.classwise_converter(input: Tensor, name: str, labels: List[str] | None = None) Dict[str, Tensor]

将未平均的度量结果张量转换为字典,每个键为‘metricname_classlabel’,值为与该类相关的数据。

Parameters:
  • 输入 (torch.Tensor) – 沿其第一维度分割的张量。

  • name (str) – 指标的名称。

  • labels (List[str], Optional) – 可选的字符串列表,表示不同的类别。

Raises:

ValueError – 当labels的长度不等于类别数量时。

torcheval.metrics.toolkit.clone_metric(metric: Metric) Metric

返回一个从输入指标克隆的新指标实例。

Parameters:

metric – 要克隆的度量对象

Returns:

从克隆创建的新指标实例

torcheval.metrics.toolkit.clone_metrics(metrics: _TMetrics) List[Metric]

返回从输入指标克隆的新指标实例列表。

Parameters:

metrics – 要克隆的度量对象

Returns:

克隆的指标实例列表

torcheval.metrics.toolkit.get_synced_metric(metric: Metric, process_group: ProcessGroup | None = None, recipient_rank: int | Literal['all'] = 0) Metric | None

返回一个关于recipient_rank的度量对象,其内部状态变量在process_group中的进程之间同步。在非recipient rank上返回None

如果all作为recipient_rank传递,process_group中的所有等级都被视为接收者等级。

Parameters:
  • metric – 要同步的度量对象。

  • process_group – 收集指标状态的进程组。默认值:None(整个进程组)

  • recipient_rank – 目标排名。如果传入字符串“all”,则所有排名都是目标排名。

Raises:

ValueError – 当 recipient_rank 不是整数或字符串“all”时。

示例:

>>> # Assumes world_size of 3.
>>> # Process group initialization omitted on each rank.
>>> import torch
>>> import torch.distributed as dist
>>> from torcheval import Max
>>> max = Max()
>>> max.update(torch.tensor(dist.get_rank())).compute()
tensor(0.) # Rank 0
tensor(1.) # Rank 1
tensor(2.) # Rank 2
>>> synced_metric = get_synced_metric(max)  # by default sync metric states to Rank 0
>>> synced_metric.compute() if synced_metric else None
tensor(2.)     # Rank 0
None # Rank 1 -- synced_metric is None
None # Rank 2 -- synced_metric is None
>>> synced_metric = get_synced_metric(max, recipient_rank=1)
>>> synced_metric.compute() if synced_metric else None
None # Rank 0 -- synced_metric is None
tensor(2.)     # Rank 1
None # Rank 2 -- synced_metric is None
>>>  get_synced_metric(max, recipient_rank="all").compute()
tensor(2.) # Rank 0
tensor(2.) # Rank 1
tensor(2.) # Rank 2
torcheval.metrics.toolkit.get_synced_metric_collection(metric_collection: MutableMapping[str, Metric], process_group: ProcessGroup | None = None, recipient_rank: int | Literal['all'] = 0) Dict[str, Metric] | None | MutableMapping[str, Metric]

返回一个包含度量对象的字典给recipient_rank,其内部状态变量在process_group中的进程之间同步。在非recipient_rank上返回None

数据传输是批量进行的,以最大限度地提高效率。

如果将all作为recipient_rank传递,则process_group中的所有等级都将被视为接收者等级。

Parameters:
  • metric_collection (Dict[str, Metric]) – 要同步的指标对象字典。

  • process_group (int) – 收集指标状态的进程组。默认值:None(整个进程组)

  • recipient_rank – 目标排名。如果传入字符串“all”,则所有排名都是目标排名。

Raises:

ValueError – 当 recipient_rank 不是整数或字符串“all”时。

示例:

>>> # Assumes world_size of 3.
>>> # Process group initialization omitted on each rank.
>>> import torch
>>> import torch.distributed as dist
>>> from torcheval.metrics import Max, Min
>>> metrics = {"max" : Max(), "min": Min()}
>>> metrics["max"].update(torch.tensor(dist.get_rank()))
>>> metrics["min"].update(torch.tensor(dist.get_rank()))
>>> synced_metrics = get_synced_metric_collection(metrics)

by default metrics sync to Rank 0
>>> synced_metrics["max"].compute() if synced_metrics else None
tensor(2.) # Rank 0
None       # Rank 1 -- synced_metrics is None
None       # Rank 2 -- synced_metrics is None
>>> synced_metrics["min"].compute() if synced_metrics else None
tensor(0.) # Rank 0
None       # Rank 1 -- synced_metrics is None
None       # Rank 2 -- synced_metrics is None

you can also sync to all ranks or choose a specific rank
>>> synced_metrics = get_synced_metric_collection(metrics, recipient_rank="all")
>>> synced_metrics["max"].compute()
tensor(2.) # Rank 0
tensor(2.) # Rank 1
tensor(2.) # Rank 2
>>> synced_metrics["min"].compute()
tensor(0.) # Rank 0
tensor(0.) # Rank 1
tensor(0.) # Rank 2
torcheval.metrics.toolkit.get_synced_state_dict(metric: Metric, process_group: ProcessGroup | None = None, recipient_rank: int | Literal['all'] = 0) Dict[str, Any]

返回在recipient_rank上同步后的度量状态字典。 在其他rank上返回一个空字典。

Parameters:
  • metric – 要同步并获取state_dict()的度量对象

  • process_group – 收集指标状态的进程组。默认值:None(整个进程组)

  • recipient_rank – 目标排名。如果传入字符串“all”,则所有排名都是目标排名。

Returns:

同步指标的状态字典

示例:

>>> # Assumes world_size of 3.
>>> # Process group initialization omitted on each rank.
>>> import torch
>>> import torch.distributed as dist
>>> from torcheval import Max
>>> max = Max()
>>> max.update(torch.tensor(dist.get_rank()))
>>> get_synced_state_dict(max)
{"max", tensor(2.)} # Rank 0
{} # Rank 1
{} # Rank 2
>>> get_synced_state_dict(max, recipient_rank="all")
{"max", tensor(2.)} # Rank 0
{"max", tensor(2.)} # Rank 1
{"max", tensor(2.)} # Rank 2
torcheval.metrics.toolkit.get_synced_state_dict_collection(metric_collection: MutableMapping[str, Metric], process_group: ProcessGroup | None = None, recipient_rank: int | Literal['all'] = 0) Dict[str, Dict[str, Any]] | None

在同步到recipient_rank后返回一组指标的状态字典。在其他rank上返回None。

Parameters:
  • metric_collection (Dict[str, Metric]) – 要同步并获取state_dict()的指标对象

  • process_group – 收集指标状态的进程组。默认值:None(整个进程组)

  • recipient_rank – 目标排名。如果传入字符串“all”,则所有排名都是目标排名。

Returns:

同步指标的状态字典集合

示例:

>>> # Assumes world_size of 3.
>>> # Process group initialization omitted on each rank.
>>> import torch
>>> import torch.distributed as dist
>>> from torcheval import Max, Min
>>> maximum = Max()
>>> maximum.update(torch.tensor(dist.get_rank()))
>>> minimum = Min()
>>> minimum.update(torch.tensor(dist.get_rank()))
>>> get_synced_state_dict({"max rank": maximum, "min rank": minimum})
{"max rank": {"max", tensor(2.)}, "min rank": {"min", tensor(0.)}} # Rank 0
None # Rank 1
None # Rank 2
>>> get_synced_state_dict({"max rank": maximum, "min rank": minimum}, recipient_rank="all")
{"max rank": {"max", tensor(2.)}, "min rank": {"min", tensor(0.)}} # Rank 0
{"max rank": {"max", tensor(2.)}, "min rank": {"min", tensor(0.)}} # Rank 1
{"max rank": {"max", tensor(2.)}, "min rank": {"min", tensor(0.)}} # Rank 2
torcheval.metrics.toolkit.reset_metrics(metrics: _TMetrics) _TMetrics

重置输入指标并将重置的集合返回给用户。

Parameters:

metrics – 要重置的指标

示例:

>>> from torcheval.metrics import Max, Min
>>> max = Max()
>>> min = Min()
>>> max.update(torch.tensor(1)).compute()
>>> min.update(torch.tensor(2)).compute()
>>> max, min = reset_metrics((max, min))
>>> max.compute()
tensor(0.)
>>> min.compute()
tensor(0.)
torcheval.metrics.toolkit.sync_and_compute(metric: Metric[TComputeReturn], process_group: ProcessGroup | None = None, recipient_rank: int | Literal['all'] = 0) TComputeReturn | None

同步指标状态并返回接收者排名上同步指标的metric.compute()结果。在其他排名上返回None

Parameters:
  • metric – 要同步和计算的度量对象。

  • process_group – 收集指标状态的进程组。默认值:None(整个进程组)

  • recipient_rank – 目标排名。如果传入字符串“all”,则所有排名都是目标排名。

示例:

>>> # Assumes world_size of 3.
>>> # Process group initialization omitted on each rank.
>>> import torch
>>> import torch.distributed as dist
>>> from torcheval.metrics import Max
>>> max = Max()
>>> max.update(torch.tensor(dist.get_rank())).compute()
tensor(0.) # Rank 0
tensor(1.) # Rank 1
tensor(2.) # Rank 2
>>> sync_and_compute(max)
tensor(2.) # Rank 0
None # Rank 1
None # Rank 2
>>> sync_and_compute(max, recipient_rank="all")
tensor(2.) # Rank 0
tensor(2.) # Rank 1
tensor(2.) # Rank 2
torcheval.metrics.toolkit.sync_and_compute_collection(metrics: MutableMapping[str, Metric], process_group: ProcessGroup | None = None, recipient_rank: int | Literal['all'] = 0) Dict[str, Any] | None

同步一组指标的状态,并返回接收者排名上同步指标的metric.compute()结果。在其他排名上返回None

Parameters:
  • metrics – 要同步和计算的指标对象的字典。

  • process_group – 收集指标状态的进程组。默认值:None(整个进程组)

  • recipient_rank – 目标排名。如果传入字符串“all”,则所有排名都是目标排名。

示例:

>>> # Assumes world_size of 3.
>>> # Process group initialization omitted on each rank.
>>> import torch
>>> import torch.distributed as dist
>>> from torcheval.metrics import Max, Min
>>> metrics = {"max" : Max(), "min": Min()}
>>> metrics["max"].update(torch.tensor(dist.get_rank())).compute()
tensor(0.) # Rank 0
tensor(1.) # Rank 1
tensor(2.) # Rank 2
>>> metrics["min"].update(torch.tensor(dist.get_rank())).compute()
tensor(0.) # Rank 0
tensor(1.) # Rank 1
tensor(2.) # Rank 2
>>> sync_and_compute_collection(metrics)
{"max" : tensor(2.), "min": tensor(0.)} # Rank 0
None # Rank 1
None # Rank 2
>>> sync_and_compute_collection(metrics, recipient_rank="all")
{"max" : tensor(2.), "min": tensor(0.)} # Rank 0
{"max" : tensor(2.), "min": tensor(0.)} # Rank 1
{"max" : tensor(2.), "min": tensor(0.)} # Rank 2
torcheval.metrics.toolkit.to_device(metrics: _TMetrics, device: device, *args: Any, **kwargs: Any) _TMetrics

将输入指标移动到目标设备,并将移动后的指标返回给用户。

Parameters:
  • metrics – 要移动到设备的指标

  • device – 将指标移动到的设备

  • *args – 传递给 Metric.to 的可变参数

  • **kwargs – 命名参数转发到 Metric.to

示例:

>>> from torcheval.metrics import Max, Min
>>> max = Max()
>>> min = Min()
>>> max, min = to_device((max, min), torch.device("cuda"))
>>> max.device
torch.device("cuda")
>>> min.device
torch.device("cuda")