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[AMD][MI355X] Bump qwen3.5-bf16 single-node SGLang image to v0.5.12.post1 #1673

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[AMD][MI355X] Bump qwen3.5-bf16 single-node SGLang image to v0.5.12.post1 #1673

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6c9c79f
[AMD][MI355X] Bump qwen3.5-bf16 single-node SGLang image to v0.5.12.p…
Jun 5, 2026
5206b21
Add perf-changelog entry for qwen3.5-bf16-mi355x-sglang(-mtp) image bump
Jun 9, 2026
3ba55e9
Merge remote-tracking branch 'origin/main' into chang/qwen3.5-bf16-sg…
Jun 9, 2026
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4 changes: 2 additions & 2 deletions .github/configs/amd-master.yaml
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Original file line number Diff line number Diff line change
Expand Up @@ -166,7 +166,7 @@ dsr1-fp8-mi355x-sglang-mtp:
- { tp: 8, ep: 1, conc-start: 4, conc-end: 64, spec-decoding: mtp }

qwen3.5-bf16-mi355x-sglang:
image: lmsysorg/sglang-rocm:v0.5.12-rocm720-mi35x-20260517
image: lmsysorg/sglang:v0.5.12.post1-rocm720-mi35x
model: Qwen/Qwen3.5-397B-A17B
model-prefix: qwen3.5
runner: mi355x
Expand All @@ -185,7 +185,7 @@ qwen3.5-bf16-mi355x-sglang:
- { tp: 8, ep: 1, conc-start: 4, conc-end: 256 }

qwen3.5-bf16-mi355x-sglang-mtp:
image: lmsysorg/sglang-rocm:v0.5.12-rocm720-mi35x-20260517
image: lmsysorg/sglang:v0.5.12.post1-rocm720-mi35x
model: Qwen/Qwen3.5-397B-A17B
model-prefix: qwen3.5
runner: mi355x
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9 changes: 9 additions & 0 deletions perf-changelog.yaml
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Expand Up @@ -3531,3 +3531,12 @@
- "The Rust frontend replaces only the Python serving/API layer (HTTP, tokenization, scheduling glue, detokenization) and spawns the same Python EngineCore, so GPU kernels/attention/MoE GEMM/KV cache are untouched"
- "A/B sweep (28 single-node points, 1k1k + 8k1k, TP 1/2/4) vs the Python-frontend baseline (run 26696260751): throughput Pareto-neutral (peak tok/s/GPU within <1.5%, frontiers coincident) and TPOT flat (+-0.5%); TTFT improves ~8% at 1k1k and ~22% at 8k1k (every point), the expected signature of lower frontend CPU latency before first token, scaling with input length"
pr-link: https://github.com/SemiAnalysisAI/InferenceX/pull/1634

- config-keys:
- qwen3.5-bf16-mi355x-sglang
- qwen3.5-bf16-mi355x-sglang-mtp
description:
- "Bump image from lmsysorg/sglang-rocm:v0.5.12-rocm720-mi35x-20260517 to lmsysorg/sglang:v0.5.12.post1-rocm720-mi35x to fix MTP performance drop."
- "Root cause: the old image shipped an AITER build that lacked Qwen3.5-397B TP8 MoE kernel tuning and kernel-selection coverage. EAGLE/MTP ran functionally, but the verify and MoE decode paths selected suboptimal AITER kernels, erasing the expected speculative-decoding speedup on MI355X. The newer v0.5.12.post1 image includes later AITER changes (candidate PRs: aiter#3453, aiter#3341) that add proper Qwen3.5-397B TP8 MoE kernel coverage and retuning, restoring the MTP throughput gap to +34..69% (conc 1..32)."
- "On the new image, EAGLE-MTP delivers +34..69% total token throughput and -28..42% median TPOT over non-MTP at conc 1..32 (1k/1k, TP=8, EP=1, triton attention). conc=64 throughput speedup limited to +6.9% by EAGLE silent max_running_requests=48 cap, while TPOT speedup stays at 1.39x."
pr-link: https://github.com/SemiAnalysisAI/InferenceX/pull/1673