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[ROCm][Perf] Use fused softplus-sqrt-topk router under AITER fused-MoE#44945

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tjtanaa merged 3 commits into
vllm-project:mainfrom
Fangzhou-Ai:dsv4-rocm-aiter-moe-dispatch
Jun 9, 2026
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[ROCm][Perf] Use fused softplus-sqrt-topk router under AITER fused-MoE#44945
tjtanaa merged 3 commits into
vllm-project:mainfrom
Fangzhou-Ai:dsv4-rocm-aiter-moe-dispatch

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@Fangzhou-Ai

@Fangzhou-Ai Fangzhou-Ai commented Jun 9, 2026

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Purpose

The softplus-sqrt-topk fusion was passed by for AITER fused-MoE path, adding them back to re-enable this feature.

Test Result

GSM8k tests:
local-chat-completions ({'model': 'deepseek-ai/DeepSeek-V4-Pro', 'base_url': 'http://127.0.0.1:8888/v1/chat/completions', 'api_key': 'EMPTY', 'eos_string':'', 'max_retries': 5, 'num_concurrent': 256, 'timeout': 1800, 'tokenized_requests': False, 'max_length': 9472}), gen_kwargs: ({'max_tokens': 5376, 'temperature': 0, 'top_p': 1}), limit: None, num_fewshot: 20, batch_size: 1

Task Version Filter n-shot Metric Value Stderr
gsm8k 3 flexible-extract 20 exact_match 0.956 ±0.0056
gsm8k 3 strict-match 20 exact_match 0.956 ±0.0056

ISL/OSL 8K1K tests:

Concurrency Baseline tok/s New tok/s Δ tok/s Throughput gain Baseline mean TPOT New mean TPOT Δ TPOT TPOT reduction
4 78.03 81.04 +3.01 +3.9% 48.57 ms 46.82 ms -1.75 ms 3.6% better
8 141.18 146.45 +5.27 +3.7% 52.77 ms 50.86 ms -1.91 ms 3.6% better
16 238.72 246.80 +8.08 +3.4% 61.43 ms 59.44 ms -1.99 ms 3.2% better
32 390.06 403.04 +12.98 +3.3% 74.92 ms 72.51 ms -2.41 ms 3.2% better
64 578.68 595.56 +16.88 +2.9% 102.52 ms 99.63 ms -2.89 ms 2.8% better
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@mergify mergify Bot added the rocm Related to AMD ROCm label Jun 9, 2026
@github-project-automation github-project-automation Bot moved this to Todo in AMD Jun 9, 2026
@Fangzhou-Ai

Fangzhou-Ai commented Jun 9, 2026

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@tjtanaa
tjtanaa
tjtanaa reviewed Jun 9, 2026
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Comment thread vllm/model_executor/layers/fused_moe/router/fused_topk_bias_router.py Outdated
@tjtanaa tjtanaa added the ready ONLY add when PR is ready to merge/full CI is needed label Jun 9, 2026
@tjtanaa tjtanaa enabled auto-merge (squash) June 9, 2026 15:33
@tjtanaa tjtanaa merged commit 01d8cd9 into vllm-project:main Jun 9, 2026
80 of 81 checks passed
@github-project-automation github-project-automation Bot moved this from Todo to Done in AMD Jun 9, 2026
ekagra-ranjan pushed a commit to ekagra-ranjan/vllm that referenced this pull request Jun 9, 2026
@Fangzhou-Ai @ekagra-ranjan
[ROCm][Perf] Use fused softplus-sqrt-topk router under AITER fused-MoE (
f06fcb8 
vllm-project#44945)

Co-authored-by: vLLM Contributor <contributor@vllm.ai>
Signed-off-by: Ekagra Ranjan <3116519+ekagra-ranjan@users.noreply.github.com>
waqahmed-amd-fi pushed a commit to waqahmed-amd-fi/vllm that referenced this pull request Jun 10, 2026
@Fangzhou-Ai @waqahmed-amd-fi
[ROCm][Perf] Use fused softplus-sqrt-topk router under AITER fused-MoE (
448ca8c 
vllm-project#44945)

Co-authored-by: vLLM Contributor <contributor@vllm.ai>
Signed-off-by: Waqar Ahmed <waqar.ahmed@amd.com>
Saddss pushed a commit to Saddss/vllm that referenced this pull request Jun 14, 2026
@Fangzhou-Ai
[ROCm][Perf] Use fused softplus-sqrt-topk router under AITER fused-MoE (
91749d6 
vllm-project#44945)

Co-authored-by: vLLM Contributor <contributor@vllm.ai>
vivek8123 pushed a commit to odh-on-pz/vllm-upstream that referenced this pull request Jun 18, 2026
@Fangzhou-Ai
[ROCm][Perf] Use fused softplus-sqrt-topk router under AITER fused-MoE (
2cac1da 
vllm-project#44945)

Co-authored-by: vLLM Contributor <contributor@vllm.ai>
divineearthly pushed a commit to divineearthly/vllm that referenced this pull request Jun 19, 2026
@Fangzhou-Ai @divineearthly
[ROCm][Perf] Use fused softplus-sqrt-topk router under AITER fused-MoE (
e93c895 
vllm-project#44945)

Co-authored-by: vLLM Contributor <contributor@vllm.ai>
Signed-off-by: divineearthly <divineearthly@gmail.com>
tunglinwood pushed a commit to tunglinwood/vllm that referenced this pull request Jun 22, 2026
@Fangzhou-Ai
[ROCm][Perf] Use fused softplus-sqrt-topk router under AITER fused-MoE (
413d138 
vllm-project#44945)

Co-authored-by: vLLM Contributor <contributor@vllm.ai>
nkzhenhua pushed a commit to nkzhenhua/vllm that referenced this pull request Jun 24, 2026
@Fangzhou-Ai @nkzhenhua
[ROCm][Perf] Use fused softplus-sqrt-topk router under AITER fused-MoE (
cb1c1db 
vllm-project#44945)

Co-authored-by: vLLM Contributor <contributor@vllm.ai>
ohsono pushed a commit to ohsono/vllm that referenced this pull request Jul 3, 2026
@Fangzhou-Ai
[ROCm][Perf] Use fused softplus-sqrt-topk router under AITER fused-MoE (
d241e16 
vllm-project#44945)

Co-authored-by: vLLM Contributor <contributor@vllm.ai>
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ready ONLY add when PR is ready to merge/full CI is needed rocm Related to AMD ROCm

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@Fangzhou-Ai @tjtanaa