TensorFlow中设备过滤器的格式是什么？

Question

所以Session config proto有一个device_filters选项,注释如下:

// When any filters are present sessions will ignore all devices which do not
  // match the filters. Each filter can be partially specified, e.g. "/job:ps"
  // "/job:worker/replica:3", etc.

有没有人对格式有具体的解释？例如,我想排除/ gpu:0作为选项,因为我用它来运行其他模型.

我试过了

config = tf.ConfigProto()
config.device_filters.append('/gpu:1')
config.device_filters.append('/cpu:0')
with tf.Session(config=config):
    # Do stuff

但是我仍然将操作分配给gpu 0.我不想在每个操作的基础上覆盖设备.

Answer 1

该ConfigProto.device_filters字段目前被 TensorFlow 忽略，但它旨在支持您未来的用例。如果你想达到上运行OPS的同一端/gpu:1和/cpu:0，你能做到这一点，如下所示，使用“软配置”：

with tf.device("/gpu:1"):
  # Build your model in this with context. All nodes will get the
  # device "/gpu:1".

with tf.Session(config=tf.ConfigProto(allow_soft_placement=True)):
  # Execute your mode in this with context.
  # Soft placement will use /gpu:1 for GPU-compatible ops, and /cpu:0
  # for CPU-only ops.