47 lines
1.5 KiB
Python
47 lines
1.5 KiB
Python
import torch
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def moe_align_block_size(
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topk_ids,
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num_experts,
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block_size,
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sorted_token_ids,
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experts_ids,
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num_tokens_post_pad,
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token_cnts_buffer,
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cumsum_buffer,
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):
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torch.ops.sgl_kernel.moe_align_block_size.default(
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topk_ids,
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num_experts,
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block_size,
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sorted_token_ids,
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experts_ids,
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num_tokens_post_pad,
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token_cnts_buffer,
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cumsum_buffer,
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)
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def topk_softmax(
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topk_weights: torch.Tensor,
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topk_ids: torch.Tensor,
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token_expert_indices: torch.Tensor,
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gating_output: float,
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) -> None:
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torch.ops.sgl_kernel.topk_softmax.default(
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topk_weights, topk_ids, token_expert_indices, gating_output
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)
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def moe_fused_gate(input_tensor, bias, num_expert_group, topk_group, topk):
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# This fused kernel function is used to select topk expert in a hierarchical 2-layer fashion
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# it split group of expert into num_expert_group, and use top2 expert weight sum in each group
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# as the group weight to select exerpt groups and then select topk experts within the selected groups
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# the #experts is decided by the input tensor shape and we currently only support power of 2 #experts
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# and #experts should be divisible by num_expert_group. #expert/num_expert_group <= 32 is limitted for now.
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# for non-supported case, we suggestion to use the biased_grouped_topk func in sglang.srt.layers.moe.topk
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return torch.ops.sgl_kernel.moe_fused_gate(
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input_tensor, bias, num_expert_group, topk_group, topk
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)
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