support mtp in v1_scheduler mode (#3695)

custom_ops/gpu_ops/recover_decode_task.cu

@@ -15,31 +15,72 @@
 #include "helper.h"
 
 __global__ void recover_decode_task(bool *stop_flags,
-                                   int *seq_lens_this_time,
-                                   int *seq_lens_encoder,
-                                   int *seq_lens_decoder,
-                                   int *step_seq_lens_decoder,
-                                   int *block_tables,
-                                   bool *is_block_step,
-                                   const int bsz,
-                                   const int block_num_per_seq,
-                                   const int block_size) {
+                                    int *seq_lens_this_time,
+                                    int *seq_lens_encoder,
+                                    int *seq_lens_decoder,
+                                    int *step_seq_lens_decoder,
+                                    int *block_tables,
+                                    bool *is_block_step,
+                                    const int bsz,
+                                    const int block_num_per_seq,
+                                    const int block_size) {
     int thread_idx = threadIdx.x;
     if (thread_idx < bsz) {
         if(is_block_step[thread_idx] == true) {
             int *block_table_now = block_tables + thread_idx * block_num_per_seq;
             if (block_table_now[step_seq_lens_decoder[thread_idx] / block_size] != -1) {
-                    // can be recovered for decoding
-                    is_block_step[thread_idx] = false;
-                    seq_lens_this_time[thread_idx]= 1;
-                    stop_flags[thread_idx] = false;
-                    seq_lens_encoder[thread_idx] = 0;
-                    seq_lens_decoder[thread_idx] = step_seq_lens_decoder[thread_idx];
-                }
+                // can be recovered for decoding
+                is_block_step[thread_idx] = false;
+                seq_lens_this_time[thread_idx]= 1;
+                stop_flags[thread_idx] = false;
+                seq_lens_encoder[thread_idx] = 0;
+                seq_lens_decoder[thread_idx] = step_seq_lens_decoder[thread_idx];
+
+            }
         }
     }
 }
 
+__global__ void recover_spec_decode_task(bool *stop_flags,
+                                        int *seq_lens_this_time,
+                                        int *seq_lens_encoder,
+                                        int *seq_lens_decoder,
+                                        int *step_seq_lens_decoder,
+                                        int *block_tables,
+                                        bool *is_block_step,
+                                        int64_t *draft_tokens,
+                                        const int64_t *step_draft_tokens,
+                                        const int *step_seq_lens_this_time,
+                                        const int bsz,
+                                        const int block_num_per_seq,
+                                        const int block_size,
+                                        const int draft_tokens_len,
+                                        const int num_extra_tokens) {
+    int thread_idx = threadIdx.x;
+    if (thread_idx < bsz) {
+        if(is_block_step[thread_idx] == true) {
+            int *block_table_now = block_tables + thread_idx * block_num_per_seq;
+            int max_possible_block_idx = (step_seq_lens_decoder[thread_idx] + num_extra_tokens) / block_size;
+            max_possible_block_idx = min(max_possible_block_idx, block_num_per_seq);
+            if (block_table_now[max_possible_block_idx] != -1) {
+                // can be recovered for decoding
+                int64_t *draft_tokens_now = draft_tokens + thread_idx * draft_tokens_len;
+                const int64_t *step_draft_tokens_now = step_draft_tokens + thread_idx * draft_tokens_len;
+                is_block_step[thread_idx] = false;
+                seq_lens_this_time[thread_idx] = step_seq_lens_this_time[thread_idx];
+                stop_flags[thread_idx] = false;
+                seq_lens_encoder[thread_idx] = 0;
+                seq_lens_decoder[thread_idx] = step_seq_lens_decoder[thread_idx];
+                for (int i = 0; i < seq_lens_this_time[thread_idx]; i++) {
+                    draft_tokens_now[i] = step_draft_tokens_now[i];
+                }
+
+            }
+        }
+    }
+}
+
+
 void RecoverDecodeTask(const paddle::Tensor &stop_flags,
                    const paddle::Tensor &seq_lens_this_time,
                    const paddle::Tensor &seq_lens_encoder,
@@ -47,7 +88,11 @@ void RecoverDecodeTask(const paddle::Tensor &stop_flags,
                    const paddle::Tensor &step_seq_lens_decoder,
                    const paddle::Tensor &block_tables,
                    const paddle::Tensor &is_block_step,
-                   const int block_size) {
+                   const paddle::optional<paddle::Tensor> &draft_tokens,
+                   const paddle::optional<paddle::Tensor> &step_draft_tokens,
+                   const paddle::optional<paddle::Tensor> &step_seq_lens_this_time,
+                   const int block_size,
+                   const int max_draft_tokens) {
 #ifdef PADDLE_WITH_CUSTOM_DEVICE
     auto dev_ctx = static_cast<const phi::CustomContext*>(paddle::experimental::DeviceContextPool::Instance().Get(seq_lens_this_time.place()));
     auto cu_stream = dev_ctx->stream();
@@ -56,17 +101,38 @@ void RecoverDecodeTask(const paddle::Tensor &stop_flags,
 #endif
     const int bsz = seq_lens_this_time.shape()[0];
     const int block_num_per_seq = block_tables.shape()[1];
-    recover_decode_task<<<1, 1024, 0, cu_stream>>>(
-        const_cast<bool *>(stop_flags.data<bool>()),
-        const_cast<int *>(seq_lens_this_time.data<int>()),
-        const_cast<int *>(seq_lens_encoder.data<int>()),
-        const_cast<int *>(seq_lens_decoder.data<int>()),
-        const_cast<int *>(step_seq_lens_decoder.data<int>()),
-        const_cast<int *>(block_tables.data<int>()),
-        const_cast<bool *>(is_block_step.data<bool>()),
-        bsz,
-        block_num_per_seq,
-        block_size);
+    if (draft_tokens) {
+        const int draft_tokens_len = draft_tokens.get_ptr()->shape()[1];
+        recover_spec_decode_task<<<1, 1024, 0, cu_stream>>>(
+            const_cast<bool *>(stop_flags.data<bool>()),
+            const_cast<int *>(seq_lens_this_time.data<int>()),
+            const_cast<int *>(seq_lens_encoder.data<int>()),
+            const_cast<int *>(seq_lens_decoder.data<int>()),
+            const_cast<int *>(step_seq_lens_decoder.data<int>()),
+            const_cast<int *>(block_tables.data<int>()),
+            const_cast<bool *>(is_block_step.data<bool>()),
+            const_cast<int64_t *>(draft_tokens.get_ptr()->data<int64_t>()),
+            step_draft_tokens.get_ptr()->data<int64_t>(),
+            step_seq_lens_this_time.get_ptr()->data<int>(),
+            bsz,
+            block_num_per_seq,
+            block_size,
+            draft_tokens_len,
+            max_draft_tokens * 2 + 1);
+
+    } else {
+        recover_decode_task<<<1, 1024, 0, cu_stream>>>(
+            const_cast<bool *>(stop_flags.data<bool>()),
+            const_cast<int *>(seq_lens_this_time.data<int>()),
+            const_cast<int *>(seq_lens_encoder.data<int>()),
+            const_cast<int *>(seq_lens_decoder.data<int>()),
+            const_cast<int *>(step_seq_lens_decoder.data<int>()),
+            const_cast<int *>(block_tables.data<int>()),
+            const_cast<bool *>(is_block_step.data<bool>()),
+            bsz,
+            block_num_per_seq,
+            block_size);
+    }
 }
 
 PD_BUILD_STATIC_OP(recover_decode_task)
@@ -76,8 +142,11 @@ PD_BUILD_STATIC_OP(recover_decode_task)
              "seq_lens_decoder",
              "step_seq_lens_decoder",
              "block_tables",
-             "is_block_step"})
-    .Attrs({"block_size: int"})
+             "is_block_step",
+             paddle::Optional("draft_tokens"),
+             paddle::Optional("step_draft_tokens"),
+             paddle::Optional("step_seq_lens_this_time")})
+    .Attrs({"block_size: int", "max_draft_tokens: int"})
     .Outputs({"seq_lens_this_time_out",
               "seq_lens_encoder_out",
               "seq_lens_decoder_out",