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[JAX] Keep MoE aux-loss cotangent scalar #3237

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Merged
tdophung merged 1 commit into from
Jul 24, 2026
+1 −2
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[JAX] Keep MoE aux-loss cotangent scalar #3237

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3 changes: 1 addition & 2 deletions transformer_engine/jax/router.py
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Original file line number Diff line number Diff line change
Expand Up @@ -342,12 +342,11 @@ def _fused_moe_aux_loss_fwd(probs, tokens_per_expert, topk, coeff):
def _fused_moe_aux_loss_bwd(topk, coeff, residuals, g):
del topk, coeff
const_buf, tokens_per_expert, num_tokens = residuals
grad_aux_loss = g.reshape(1)

grad_probs = fused_moe_aux_loss_bwd(
const_buf,
tokens_per_expert,
grad_aux_loss,
g,
num_tokens,
)
return grad_probs, None
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