Open ybu-lxd opened 4 months ago
Hello! Can you answer these questions?
I dropped your code into claude, and hopfully this gives you some indication:
The main reason you're running out of CUDA memory is the large size of your input tensor. Let's break down the memory usage:
Input tensor x:
Shape: (4, 40964, 1152) = (4, 16384, 1152) Elements: 4 16384 * 1152 = 75,497,472 Assuming float32, this tensor alone requires about 302 MB of memory.
Network parameters:
Input size: 1152 Hidden size: 1152 * 4 = 4608 This results in two large matrices in the KAN layers, each potentially using significant memory.
Intermediate activations:
The forward pass will create several large intermediate tensors, further increasing memory usage.
To address this issue, you can try the following approaches:
Reduce batch size: Instead of processing 4 samples at once, try reducing it to 1 or 2: pythonCopyx = torch.rand(size=(1, 4096*4, 1152)).to("cuda")
Use gradient accumulation: If you need to process larger batches for training stability, you can use gradient accumulation. This involves processing smaller sub-batches and accumulating gradients before performing an optimization step. Use mixed precision training: Utilize float16 (half-precision) computations to reduce memory usage. You can use NVIDIA's Apex library or PyTorch's native AMP (Automatic Mixed Precision): pythonCopyfrom torch.cuda.amp import autocast
with autocast(): output = net(x)
Optimize your model architecture: Consider if you can reduce the size of your hidden layers or use more memory-efficient architectures. Use gradient checkpointing: This technique trades computation for memory by not storing all intermediate activations. If possible, process your data in smaller chunks: Instead of processing the entire 4096*4 sequence length at once, you might be able to process it in smaller segments.