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I can use this torch.cuda.device_count() to check the number of GPUs. I was wondering if there was something equivalent to check the number of CPUs.
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cpu_count() method in Python is used to get the number of CPUs in the system. This method returns None if number of CPUs in the system is undetermined. Parameter: No parameter is required. Return Type: This method returns an integer value which denotes the number of CPUs in the system.
A node is the name usually used for one unit (usually one computer) in a computer cluster. Generally, this computer will have one or two CPUs, each normally with more than one core. The memory is always shared between cores on the same CPU, but generally not between the CPUs.
The thing is that as there is only one “cpu” device in PyTorch, you cannot specify which cores to run a DDP process using the device_ids arg in DistributedDataParallel constructor.
just use this :
os.cpu_count()
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