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fix: resolve qwen3.5-35ba3b megatron ep16 OOM via TP=2 (#2619) #2668

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fix: resolve qwen3.5-35ba3b megatron ep16 OOM via TP=2 (#2619) #2668

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fix: resolve qwen3.5-35ba3b megatron ep16 OOM via TP=2 (#2619)
sharonyu-115 Jun 2, 2026
504fbfc
Merge branch 'main' into qwen35-35ba3b-megatron-ep16-oom-fix
yuki-97 Jun 8, 2026
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5 changes: 5 additions & 0 deletions examples/configs/recipes/llm/grpo-qwen3.5-35ba3b-2n8g-megatron-ep16.yaml
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Expand Up @@ -12,6 +12,11 @@ policy:
enabled: false
megatron_cfg:
enabled: true
# TP=2 / ETP=1 / SP=True relieves the CUDA OOM on the distributed-logprob path
# introduced by the vLLM 0.17.1->0.20.0 bump (#2384). See issue #2619.
tensor_model_parallel_size: 2
expert_tensor_parallel_size: 1
sequence_parallel: true
expert_model_parallel_size: 16
moe_token_dispatcher_type: allgather
apply_rope_fusion: false
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