flashinfer.fused_moe.prims_ts_fp8_per_tensor_scale_moe

flashinfer.fused_moe.prims_ts_fp8_per_tensor_scale_moe(routing_logits: Tensor, routing_bias: Tensor | None, hidden_states: Tensor, gemm1_weights: Tensor, output1_scales_scalar: Tensor, output1_scales_gate_scalar: Tensor, gemm2_weights: Tensor, output2_scales_scalar: Tensor, num_experts: int, top_k: int, n_group: int | None, topk_group: int | None, intermediate_size: int, local_expert_offset: int, local_num_experts: int, routed_scaling_factor: float | None, use_routing_scales_on_input: bool, routing_method_type: int = 0, do_finalize: bool = True, enable_pdl: bool | None = None, tune_max_num_tokens: int = 8192, activation_type: int = 3, norm_topk_prob: bool = True, routing_replay_out: Tensor | None = None, output: Tensor | None = None, *, weight_layout: int = 0, fc1_per_channel_weight_scale: Tensor | None = None, fc2_per_channel_weight_scale: Tensor | None = None) → List[Tensor] | Tensor

FP8 per-tensor-scaled MoE using the Prims-TS backend on SM100.

Same arguments and return value as trtllm_fp8_per_tensor_scale_moe().

Parameters:

  • routing_logits (torch.Tensor) – [seq_len, num_experts] routing logits.

  • routing_bias (Optional[torch.Tensor]) – Optional [num_experts] routing bias.

  • hidden_states (torch.Tensor) – float8_e4m3fn activations.

  • gemm1_weights (torch.Tensor) – float8_e4m3fn FC1 weights.

  • output1_scales_scalar (torch.Tensor) – Per-expert FC1 output scales.

  • output1_scales_gate_scalar (torch.Tensor) – Per-expert FC1 gate scales.

  • gemm2_weights (torch.Tensor) – float8_e4m3fn FC2 weights.

  • output2_scales_scalar (torch.Tensor) – Per-expert FC2 output scales.

  • num_experts (int) – Total number of experts.

  • top_k (int) – Experts selected per token.

  • n_group (Optional[int]) – Number of expert groups.

  • topk_group (Optional[int]) – Groups considered for top-k routing.

  • intermediate_size (int) – Intermediate (FFN) width.

  • local_expert_offset (int) – Global offset of the first local expert.

  • local_num_experts (int) – Number of experts resident on this device.

  • routed_scaling_factor (Optional[float]) – Optional routing scale.

  • use_routing_scales_on_input (bool) – Apply routing scales on the input path when True.

  • routing_method_type (int) – Routing method selector (default 0).

  • do_finalize (bool) – If True, return the finalized MoE output.

  • enable_pdl (Optional[bool]) – Enable Programmatic Dependent Launch when supported.

  • tune_max_num_tokens (int) – Autotune token-bucket upper bound (default 8192).

  • activation_type (int) – Activation enum value (default Swiglu).

  • norm_topk_prob (bool) – Normalize top-k routing probabilities.

  • routing_replay_out (Optional[torch.Tensor]) – Optional buffer that captures selected expert IDs.

  • output (Optional[torch.Tensor]) – Optional in-place output tensor.

  • weight_layout (int) – Prims-TS weight layout enum value (default MajorK). Keyword-only.

  • fc1_per_channel_weight_scale (Optional[torch.Tensor]) – Optional per-channel FC1 weight scales. Keyword-only.

  • fc2_per_channel_weight_scale (Optional[torch.Tensor]) – Optional per-channel FC2 weight scales. Keyword-only.

Returns:

Same return contract as trtllm_fp8_per_tensor_scale_moe().

Return type:

torch.Tensor or List[torch.Tensor]