DeepSeek seems to have a much smaller context window

#9
by pliskin123 - opened

Compared to other models with similar parameter counts, DeepSeek seems to have a much smaller context window. When I use --fit-ctx to automatically allocate context size, models like Qwen and StepFun manage to get 256k, whereas DeepSeek (Q4) only gets around 90k. Why is that? I am using a 16GB 4080 and only keep shared expert on vram.

rn afaik deepseek's lightning indexer isn't implemented in llama.cpp yet so its KV cache tricks aren't usable yet, so KV cache takes up a lot more space than it should

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