feat: 1. fuse fp8 quant in kv coping in the deepseek2

      2. add flashinfer prefill and decode mla operators in the
	 deepseek2

Author: niushengxiao

lightllm/common/basemodel/basemodel.py

@@ -36,6 +36,7 @@ class TpPartBaseModel:
     infer_state_class = InferStateInfo
 
     def __init__(self, kvargs):
+        self.infer_state = self.infer_state_class()
         self.run_mode = kvargs["run_mode"]
         self.tp_rank_ = kvargs["tp_rank"]
         self.world_size_ = kvargs["world_size"]
@@ -330,7 +331,9 @@ def _decode(
         b_seq_len,
         multimodal_params,
     ):
-        infer_state = self.infer_state_class()
+        infer_state = self.infer_state
+        if self.graph is None or self.graph.need_capture(batch_size) or infer_state.is_prefill:
+            infer_state = self.infer_state_class()
         infer_state.is_prefill = False
         infer_state.batch_size = batch_size
         infer_state.total_token_num = total_token_num

lightllm/models/deepseek2/flashinfer_struct.py

@@ -0,0 +1,113 @@
+import os
+import torch
+import numpy as np
+import torch.distributed as dist
+from lightllm.models.deepseek2.infer_struct import Deepseek2InferStateInfo
+from lightllm.utils.envs_utils import enable_env_vars
+import flashinfer
+from lightllm.models.deepseek2.triton_kernel.repack_kv_index import repack_kv_index
+
+
+class Deepseek2FlashInferStateInfo(Deepseek2InferStateInfo):
+    def __init__(self):
+        super().__init__()
+        self.prefill_wrapper = None
+        self.decode_wrapper = None
+
+    def init_some_extra_state(self, model, input_ids: torch.Tensor):
+        super().init_some_extra_state(model, input_ids)
+
+        if not self.is_prefill:
+            if enable_env_vars("ENABLE_FLASHINFER_DECODE_MLA"):
+                self.tp_q_head_num = model.flashinfer_state.tp_q_head_num
+                self.kv_lora_rank = model.flashinfer_state.kv_lora_rank
+                self.qk_rope_head_dim = model.flashinfer_state.qk_rope_head_dim
+                self.qk_nope_head_dim = model.flashinfer_state.qk_nope_head_dim
+                self.softmax_scale = model.flashinfer_state.softmax_scale
+                self.q_data_type = model.flashinfer_state.data_type
+                self.kv_data_type = model.flashinfer_state.data_type
+
+                self.q_indptr = torch.arange(self.batch_size + 1, dtype=torch.int32).to(input_ids.device)
+                self.kv_indices = torch.empty(
+                    self.batch_size * model.flashinfer_state.max_seq_length, dtype=torch.int32
+                ).to(input_ids.device)
+                repack_kv_index(
+                    self.req_manager.req_to_token_indexs,
+                    self.b_req_idx,
+                    self.b_seq_len,
+                    self.b_start_loc,
+                    self.max_len_in_batch,
+                    self.kv_indices,
+                )
+                if self.decode_wrapper is None:
+                    self.decode_wrapper = flashinfer.mla.BatchMLAPagedAttentionWrapper(
+                        model.flashinfer_state.workspace_buffer,
+                        use_cuda_graph=True,
+                        qo_indptr=self.q_indptr,
+                        kv_indices=self.kv_indices,
+                        kv_indptr=self.kv_starts,
+                        kv_len_arr=self.b_seq_len,
+                    )
+                    self.decode_wrapper.plan(
+                        self.q_indptr,
+                        self.kv_starts,
+                        self.kv_indices,
+                        self.b_seq_len,
+                        self.tp_q_head_num,
+                        self.kv_lora_rank,
+                        self.qk_rope_head_dim,
+                        1,
+                        False,  # causal
+                        self.softmax_scale,
+                        self.q_data_type,
+                        self.kv_data_type,
+                    )
+        else:
+            if enable_env_vars("ENABLE_FLASHINFER_PREFILLED"):
+                self.tp_q_head_num = model.flashinfer_state.tp_q_head_num
+                self.qk_rope_head_dim = model.flashinfer_state.qk_rope_head_dim
+                self.qk_nope_head_dim = model.flashinfer_state.qk_nope_head_dim
+                self.softmax_scale = model.flashinfer_state.softmax_scale
+                self.q_data_type = model.flashinfer_state.data_type
+
+                q_starts = torch.cat(
+                    [self.b_start_loc, self.b_start_loc[-1:] + (self.b_seq_len - self.b_ready_cache_len)[-1:]], dim=0
+                ).int()
+                kv_starts = torch.cat(
+                    [self.b_kv_start_loc, self.b_kv_start_loc[-1:] + self.b_seq_len[-1:]], dim=0
+                ).int()
+                if self.prefill_wrapper is None:
+                    self.prefill_wrapper = flashinfer.prefill.BatchPrefillWithRaggedKVCacheWrapper(
+                        model.flashinfer_state.workspace_buffer, "NHD"
+                    )
+                self.prefill_wrapper.plan(
+                    qo_indptr=q_starts,
+                    kv_indptr=kv_starts,
+                    num_qo_heads=self.tp_q_head_num,
+                    num_kv_heads=self.tp_q_head_num,
+                    head_dim_qk=self.qk_nope_head_dim + self.qk_rope_head_dim,
+                    head_dim_vo=self.qk_nope_head_dim,
+                    q_data_type=self.q_data_type,
+                    causal=True,
+                    sm_scale=self.softmax_scale,
+                )
+        return
+
+    def copy_for_cuda_graph(self, new_infer_state):
+        super().copy_for_cuda_graph(new_infer_state)
+        if enable_env_vars("ENABLE_FLASHINFER_DECODE_MLA") and not self.is_prefill:
+            self.decode_wrapper.plan(
+                new_infer_state.q_indptr,
+                new_infer_state.kv_starts,
+                new_infer_state.kv_indices,
+                new_infer_state.b_seq_len,
+                new_infer_state.tp_q_head_num,
+                new_infer_state.kv_lora_rank,
+                new_infer_state.qk_rope_head_dim,
+                1,
+                False,  # causal
+                new_infer_state.softmax_scale,
+                new_infer_state.q_data_type,
+                new_infer_state.kv_data_type,
+            )
+        return

lightllm/models/deepseek2/layer_infer/transformer_layer_infer.py

@@ -5,6 +5,7 @@
 import numpy as np
 from lightllm.models.deepseek2.layer_weights.transformer_layer_weight import Deepseek2TransformerLayerWeight
 from lightllm.models.deepseek2.triton_kernel.destindex_copy_kv import destindex_copy_kv
+from lightllm.models.deepseek2.triton_kernel.destindex_copy_kv_fp8 import destindex_copy_kv_fp8
 from lightllm.models.deepseek2.triton_kernel.context_flashattention_nopad import (
     context_attention_fwd,
     context_attention_fwd_no_prompt_cache,
@@ -23,7 +24,7 @@
 from functools import partial
 from lightllm.models.llama.yarn_rotary_utils import get_deepseek_mscale
 import os
-from lightllm.common.quantization import vLLMFP8w8a8QuantizationMethod
+from lightllm.utils.envs_utils import enable_env_vars
 
 
 class Deepseek2TransformerLayerInfer(LlamaTransformerLayerInfer):
@@ -67,7 +68,6 @@ def __init__(self, layer_num, tp_rank, world_size, network_config, mode=[]):
         self.tp_o_head_num_ = self.tp_q_head_num_
         self.num_heads = network_config["num_attention_heads"]
         self.num_kv_heads = network_config["num_key_value_heads"]
-        self.enable_opt_decoding_mha = os.getenv("ENABLE_OPT_DECODE_MHA", "False").upper() in ["ON", "TRUE", "1"]
         return
 
     def _bind_func(self):
@@ -96,18 +96,33 @@ def _bind_attention(self):
             )
         else:
             self._copy_kv_to_mem_cache = partial(Deepseek2TransformerLayerInfer._copy_kv_to_mem_cache_normal, self)
-            self._token_attention_kernel = partial(
-                Deepseek2TransformerLayerInfer._token_gqa_decode_attention_flashdecoding, self
-            )
-        if self.enable_cc_method:
-            if "triton_fp8kv" in self.mode:
-                self._context_attention_kernel = partial(
-                    Deepseek2TransformerLayerInfer._context_attention_kernel_with_CC_fp8, self
+            if enable_env_vars("ENABLE_FLASHINFER_DECODE_MLA"):
+                self._token_attention_kernel = partial(
+                    Deepseek2TransformerLayerInfer._token_gqa_decode_attention_flashinfer, self
                 )
             else:
-                self._context_attention_kernel = partial(
-                    Deepseek2TransformerLayerInfer._context_attention_kernel_with_CC, self
+                self._token_attention_kernel = partial(
+                    Deepseek2TransformerLayerInfer._token_gqa_decode_attention_flashdecoding, self
                 )
+        if self.enable_cc_method:
+            if "triton_fp8kv" in self.mode:
+                if enable_env_vars("ENABLE_FLASHINFER_PREFILLED"):
+                    self._context_attention_kernel = partial(
+                        Deepseek2TransformerLayerInfer._context_attention_flashinfer_kernel_with_CC_fp8, self
+                    )
+                else:
+                    self._context_attention_kernel = partial(
+                        Deepseek2TransformerLayerInfer._context_attention_kernel_with_CC_fp8, self
+                    )
+            else:
+                if enable_env_vars("ENABLE_FLASHINFER_PREFILLED"):
+                    self._context_attention_kernel = partial(
+                        Deepseek2TransformerLayerInfer._context_attention_flashinfer_kernel_with_CC, self
+                    )
+                else:
+                    self._context_attention_kernel = partial(
+                        Deepseek2TransformerLayerInfer._context_attention_kernel_with_CC, self
+                    )
         else:
             if "triton_fp8kv" in self.mode:
                 self._context_attention_kernel = partial(
@@ -205,6 +220,38 @@ def _decompress_kv(
         k_nope, v = torch.split(kv_nope, [self.qk_nope_head_dim, self.v_head_dim], dim=-1)
         return k_nope, k_rope, v
 
+    def _context_attention_flashinfer_kernel_with_CC(
+        self,
+        q: torch.Tensor,
+        kv,
+        infer_state: Deepseek2InferStateInfo,
+        layer_weight: Deepseek2TransformerLayerWeight,
+        out=None,
+    ) -> torch.Tensor:
+        k_nope, k_rope, v = self._decompress_kv(kv, infer_state, layer_weight, False)
+        o_tensor = (
+            self.alloc_tensor((q.shape[0], q.shape[1], self.qk_nope_head_dim), dtype=q.dtype) if out is None else out
+        )
+        k = torch.cat([k_nope, torch.repeat_interleave(k_rope, self.tp_q_head_num_, dim=-2)], dim=-1)
+        infer_state.prefill_wrapper.run(q, k, v, out=o_tensor)
+        return o_tensor
+
+    def _context_attention_flashinfer_kernel_with_CC_fp8(
+        self,
+        q: torch.Tensor,
+        kv,
+        infer_state: Deepseek2InferStateInfo,
+        layer_weight: Deepseek2TransformerLayerWeight,
+        out=None,
+    ) -> torch.Tensor:
+        k_nope, k_rope, v = self._decompress_kv(kv, infer_state, layer_weight, True)
+        o_tensor = (
+            self.alloc_tensor((q.shape[0], q.shape[1], self.qk_nope_head_dim), dtype=q.dtype) if out is None else out
+        )
+        k = torch.cat([k_nope, torch.repeat_interleave(k_rope, self.tp_q_head_num_, dim=-2)], dim=-1)
+        infer_state.prefill_wrapper.run(q, k, v, out=o_tensor)
+        return o_tensor
+
     def _context_attention_kernel_with_CC(
         self,
         q: torch.Tensor,
@@ -345,6 +392,25 @@ def _context_attention_kernel_origin_fp8(
 
         return o_tensor
 
+    def _token_gqa_decode_attention_flashinfer(
+        self, q, infer_state: Deepseek2InferStateInfo, layer_weight: Deepseek2TransformerLayerWeight, out=None
+    ):
+        q_nope, q_rope = q[:, :, : -self.qk_rope_head_dim], q[:, :, -self.qk_rope_head_dim :]
+        q_nope = layer_weight.k_b_proj_.bmm(q_nope.transpose(0, 1)).transpose(0, 1)
+
+        kv = infer_state.mem_manager.kv_buffer[self.layer_num_]
+        o_tensor = self.alloc_tensor(q_nope.shape, dtype=q_nope.dtype)
+
+        infer_state.decode_wrapper.run(
+            q_nope,
+            q_rope,
+            kv[:, :, : -self.qk_rope_head_dim],
+            kv[:, :, -self.qk_rope_head_dim :],
+            out=o_tensor,
+            return_lse=False,
+        )
+        return o_tensor
+
     def _token_gqa_decode_attention_flashdecoding(
         self, q, infer_state: Deepseek2InferStateInfo, layer_weight: Deepseek2TransformerLayerWeight, out=None
     ):
@@ -354,7 +420,7 @@ def _token_gqa_decode_attention_flashdecoding(
         kv = infer_state.mem_manager.kv_buffer[self.layer_num_]
         o_tensor = self.alloc_tensor(q_nope.shape, dtype=q_nope.dtype)
 
-        if self.enable_opt_decoding_mha:
+        if enable_env_vars("ENABLE_OPT_DECODE_MHA"):
             q = torch.cat([q_nope, q_rope], dim=-1)
             q_nope, q_rope = None, None
             import lightllm_ppl_mla
@@ -368,7 +434,7 @@ def _token_gqa_decode_attention_flashdecoding(
                 infer_state.b_req_idx,
                 self.softmax_scale,
                 q.shape[-1],
-                q_nope.shape[-1],
+                self.kv_lora_rank,
             )
             return o_tensor
         else:
@@ -421,16 +487,13 @@ def _copy_kv_to_mem_cache_normal(self, buffer, mem_index, mem_manager):
         return
 
     def _copy_kv_to_mem_cache_fp8(self, buffer, mem_index, mem_manager):
-        quant_method = vLLMFP8w8a8QuantizationMethod()
-        quant, scale = quant_method.quantize_scaled_mm_fp8(buffer.reshape(-1, buffer.shape[-1]))
-        destindex_copy_kv(
-            quant.T.unsqueeze(1)[:, :, : self.kv_lora_rank].view(torch.uint8),
-            quant.T.unsqueeze(1)[:, :, self.kv_lora_rank :].view(torch.uint8),
+        destindex_copy_kv_fp8(
+            buffer[:, :, : self.kv_lora_rank],
+            buffer[:, :, self.kv_lora_rank :],
             mem_index,
-            mem_manager.kv_buffer[self.layer_num_][:, :, : self.kv_lora_rank],
-            mem_manager.kv_buffer[self.layer_num_][:, :, self.kv_lora_rank : -2],
-            mem_manager.kv_buffer[self.layer_num_][:, :, -2:],
-            scale.to(buffer.dtype).view(torch.uint8),
+            mem_manager.kv_buffer[self.layer_num_][:, :, : self.kv_lora_rank].view(torch.float8_e4m3fn),
+            mem_manager.kv_buffer[self.layer_num_][:, :, self.kv_lora_rank : -2].view(torch.float8_e4m3fn),
+            mem_manager.kv_buffer[self.layer_num_][:, :, -2:].view(buffer.dtype),
         )
         return
 

lightllm/models/deepseek2/model.py

@@ -2,26 +2,53 @@
 from lightllm.models.deepseek2.layer_infer.transformer_layer_infer import Deepseek2TransformerLayerInfer
 from lightllm.models.deepseek2.layer_weights.transformer_layer_weight import Deepseek2TransformerLayerWeight
 from lightllm.models.deepseek2.infer_struct import Deepseek2InferStateInfo
+from lightllm.models.deepseek2.flashinfer_struct import Deepseek2FlashInferStateInfo
 from lightllm.common.basemodel.layer_weights.hf_load_utils import load_hf_weights
 
 from lightllm.models.llama.model import LlamaTpPartModel
 from lightllm.common.deepseek2_mem_manager import Deepseek2MemoryManager
 from lightllm.common.deepseek2_fp8kv_mem_manager import Deepseek2FP8KVMemoryManager
 from lightllm.utils.log_utils import init_logger
+from lightllm.models.llama.yarn_rotary_utils import get_deepseek_mscale
+from lightllm.utils.envs_utils import enable_env_vars
 
 
 logger = init_logger(__name__)
 
 
+class FlashInferStateExtraInfo:
+    def __init__(self, model):
+        num_heads = model.config["num_attention_heads"]
+        self.tp_q_head_num = num_heads if enable_env_vars("ENABLE_DP") else num_heads // model.world_size_
+        self.qk_nope_head_dim = model.qk_nope_head_dim
+        self.qk_rope_head_dim = model.qk_rope_head_dim
+        self.kv_lora_rank = model.kv_lora_rank
+        self.data_type = model.data_type
+        self.workspace_buffer = torch.empty(128 * 1024 * 1024, dtype=torch.int8).to(model.tp_rank_)
+        self.max_seq_length = model.max_seq_length
+        self.softmax_scale = (self.qk_nope_head_dim + self.qk_rope_head_dim) ** (-0.5)
+        if model.config["rope_scaling"] is not None:
+            rope_scaling = model.config["rope_scaling"]
+            mscale_all_dim = rope_scaling.get("mscale_all_dim", 0)
+            scaling_factor = rope_scaling["factor"]
+            if mscale_all_dim:
+                mscale = get_deepseek_mscale(scaling_factor, mscale_all_dim)
+                self.softmax_scale = self.softmax_scale * mscale * mscale
+
+
 class Deepseek2TpPartModel(LlamaTpPartModel):
     # weight class
     transformer_weight_class = Deepseek2TransformerLayerWeight
 
     # infer class
     transformer_layer_infer_class = Deepseek2TransformerLayerInfer
 
+    enable_flashinfer = enable_env_vars("ENABLE_FLASHINFER_PREFILLED") or enable_env_vars(
+        "ENABLE_FLASHINFER_DECODE_MLA"
+    )
+
     # infer state class
-    infer_state_class = Deepseek2InferStateInfo
+    infer_state_class = Deepseek2FlashInferStateInfo if enable_flashinfer else Deepseek2InferStateInfo
 
     def __init__(self, kvargs):
         super().__init__(kvargs)
@@ -37,6 +64,8 @@ def _init_some_value(self):
         self.q_lora_rank = self.config["q_lora_rank"]
         self.kv_lora_rank = self.config["kv_lora_rank"]
         self.head_dim_ = self.kv_lora_rank + self.qk_rope_head_dim
+        if self.enable_flashinfer:
+            self.flashinfer_state = FlashInferStateExtraInfo(self)
 
     def _init_custom(self):
         self._init_to_get_yarn_rotary()