minke.yu/sglang
1
0
Fork 0
Code Issues Pull Requests Actions 12 Packages Projects Releases Wiki Activity

[Session R3] Add routed_experts_start_len for absolute routing slice control (#24851)

Browse Source 
Co-authored-by: Byron Hsu <byron@periodiclabs.ai>
Co-authored-by: Cursor <cursoragent@cursor.com>
Co-authored-by: zyzshishui <zyzshishui@gmail.com>
Co-authored-by: Yuzhen Zhou <82826991+zyzshishui@users.noreply.github.com>
This commit is contained in:
Byron Hsu
2026-05-10 10:04:43 -07:00
committed by GitHub
co-authored by Byron Hsu Cursor zyzshishui Yuzhen Zhou
parent 9150e77399
commit d82e339ce2
16 changed files with 288 additions and 11 deletions
Download Patch File Download Diff File Expand all files Collapse all files
docs_new/docs/basic_usage/sampling_params.mdx
+6 -1
View File
@@ -107,7 +107,12 @@ The `/generate` endpoint accepts the following parameters in JSON format. For de
<tr>
<td style={{padding: "9px 12px", fontWeight: 500, backgroundColor: "rgba(255,255,255,0.02)"}}>return_routed_experts</td>
<td style={{padding: "9px 12px", backgroundColor: "rgba(255,255,255,0.05)"}}>`bool = False`</td>
<td style={{padding: "9px 12px", backgroundColor: "rgba(255,255,255,0.02)"}}>Whether to return routed experts for MoE models. Requires `--enable-return-routed-experts` server flag. Returns base64-encoded int32 expert IDs as a flattened array with logical shape `[num_tokens, num_layers, top_k]`.</td>
<td style={{padding: "9px 12px", backgroundColor: "rgba(255,255,255,0.02)"}}>Whether to return routed experts for MoE models. Requires `--enable-return-routed-experts` server flag. With the default `routed_experts_start_len=0`, returns the full available sequence `[0, seqlen - 1)` because RL workflows need routed experts for the full sequence. The result is base64-encoded int32 expert IDs as a flattened array with logical shape `[num_tokens, num_layers, top_k]`.</td>
</tr>
<tr>
<td style={{padding: "9px 12px", fontWeight: 500, backgroundColor: "rgba(255,255,255,0.02)"}}>routed_experts_start_len</td>
<td style={{padding: "9px 12px", backgroundColor: "rgba(255,255,255,0.05)"}}>`int = 0`</td>
<td style={{padding: "9px 12px", backgroundColor: "rgba(255,255,255,0.02)"}}>If `return_routed_experts`, the absolute start position for returned routed-experts rows. `0` preserves the default full sequence; set it to an accumulated prefix length to return only `[routed_experts_start_len, seqlen - 1)`. For example, in multi-turn RL rollouts, routed experts for tokens from previous turns have already been collected, so setting this value avoids unnecessary transfer that cause bottlenecks. Must be in `[0, prompt_tokens]`.</td>
</tr>
</tbody>
</table>