minke.yu/sglang
1
0
Fork 0
Code Issues Pull Requests Actions 13 Packages Projects Releases Wiki Activity

[GDN] Support FlashInfer GDN prefill with extra-buffer radix cache (#29735)

Browse Source
This commit is contained in:
YAMY
2026-07-30 00:47:35 +08:00
committed by GitHub
parent 50029f05a3
commit fddfc1fb5e
9 changed files with 282 additions and 74 deletions
Download Patch File Download Diff File Expand all files Collapse all files
docs_new/docs/advanced_features/attention_backend.mdx
+1 -1
View File
@@ -338,7 +338,7 @@ GDN (Gated Delta Network) is a linear attention mechanism with O(n) complexity,
The GDN linear attention layers have their own kernel backends, selected via `--linear-attn-backend` (default: `triton`). You can override the kernel per phase with `--linear-attn-decode-backend` and `--linear-attn-prefill-backend`.
On SM100/SM103 with CUDA 13+, SGLang automatically selects FlashInfer for GDN prefill when the per-phase override is unset, the base linear-attention backend is Triton, recurrent state is BF16, key/value head dimensions are 128, dynamic chunking and page-major KV layout are disabled, and `--chunked-prefill-size` is between 1 and 8192. Radix caching may be disabled or use the `no_buffer` strategy; extra-buffer strategies require state checkpoint support.
On SM100/SM103 with CUDA 13+, SGLang automatically selects FlashInfer for GDN prefill when the per-phase override is unset, the base linear-attention backend is Triton, recurrent state is BF16, key/value head dimensions are 128, dynamic chunking and page-major KV layout are disabled, and `--chunked-prefill-size` is between 1 and 8192. Radix caching may be disabled or use `no_buffer`, `extra_buffer`, or `extra_buffer_lazy`; the extra-buffer paths use state checkpoints.
<table style={{width: "100%", borderCollapse: "collapse", tableLayout: "fixed"}}>
<colgroup>