IsoExec Unifies Execution to Fix Trainer-Inference Mismatch
vLLM Blog · rss · 2026-08-21
SkyRL introduced IsoExec to unify numerical execution across vLLM and Megatron runtimes. On Qwen3.5-35B-A3B, it reduces the rollout-versus-training logprob difference below 1e-6 with only 25% overhead, eliminating trainer-inference mismatch.
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