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paddle / CUDAPlace
CUDAPlace¶
-
class
paddle.CUDAPlace¶
CUDAPlace 是一个设备描述符，表示一个分配或将要分配 Tensor 或 LoDTensor 的 GPU 设备。 每个 CUDAPlace 有一个 dev_id （设备id）来表明当前的 CUDAPlace 所代表的显卡编号，编号从 0 开始。 dev_id 不同的 CUDAPlace 所对应的内存不可相互访问。 这里编号指的是可见显卡的逻辑编号，而不是显卡实际的编号。 可以通过 CUDA_VISIBLE_DEVICES 环境变量限制程序能够使用的 GPU 设备，程序启动时会遍历当前的可见设备，并从 0 开始为这些设备编号。 如果没有设置 CUDA_VISIBLE_DEVICES，则默认所有的设备都是可见的，此时逻辑编号与实际编号是相同的。
- 参数：
-
id (int，可选) - GPU的设备ID。如果为
None，则默认会使用 id 为 0 的设备。默认值为None。
代码示例
import paddle
place = paddle.CUDAPlace(0)
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