llamaperf
Oct 12, 2026
Throughput
49.1 t/s gen · 1028.1 tokens/s prompt processing (prefill)Prompt processing measures input prefill speed; it does not tell you the time to first token.
Quant
UD-Q4_K_XL (GGUF)
KV cache
F16
Flash Attention
on
MTP (Multi-Token Prediction)
off
System RAM
128 GB

Summary

User reports Qwen3.6 35B-A3B at 49.1 t/s generation and 1028.1 t/s prompt processing on an AMD Strix Halo 128GB machine. Setup is llama.cpp with UD-Q4_K_XL, f16 key/value cache and FlashAttention on, measured at a depth of 16,384 already-prefilled KV tokens. These are separate llama-bench pp512 and tg128 tests, not a fresh 16,384-token ingest; the same ladder gives 52.73 t/s generation at depth 0 and 50.95 t/s at depth 8,192.