## Turn 1

We need to diagnose the error: "llama-server: failed to allocate KV cache requested ctx=262144 gpu memory free=1024 MiB". Likely root cause: insufficient GPU memory to allocate KV cache for context size 262144 tokens? Actually ctx=262144 maybe context size? The KV cache size is huge. The GPU memory free is only 1024 MiB, so cannot allocate. So root cause: insufficient GPU memory for the requested context size. Next actions: reduce context size or reduce batch size, or use CPU fallback, or increase GPU memory, or use smaller model. Also check memory fragmentation. So answer: root cause: GPU memory insufficient for KV cache. Next actions: reduce context size or use smaller model, or free memory, or use CPU fallback, or upgrade GPU.

We need to provide likely root cause and next two actions. Format: just answer. No extra.