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[Cherry-Pick][Bugfix] Fix mtp logprob hang problem when include stop_seq (#5927) (#5928)

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* fix mtp logprob hang when include stop_seq
This commit is contained in:
GoldPancake
2026-01-08 14:21:33 +08:00
committed by GitHub
parent 1e8de9639e
commit d05f5f0877
2 changed files with 7 additions and 4 deletions
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custom_ops/gpu_ops/speculate_decoding/speculate_save_output_with_topk.cc
+5 -2
View File
@@ -54,6 +54,10 @@ void SpeculateSaveOutMmsgTopK(const paddle::Tensor& sampled_token_ids,
if (!save_each_rank && rank_id > 0) {
return;
}
int max_draft_tokens = sampled_token_ids.shape()[1];
int bsz = token_num_per_batch.shape()[0];
auto sampled_token_ids_cpu =
sampled_token_ids.copy_to(paddle::CPUPlace(), false);
auto logprob_token_ids_cpu =
@@ -128,7 +132,6 @@ void SpeculateSaveOutMmsgTopK(const paddle::Tensor& sampled_token_ids,
msg_sed.meta[0] = not_need_stop.data<bool>()[0] ? inference_msg_id_from_env
: -inference_msg_id_from_env;
msg_sed.meta[1] = message_flag;
int bsz = token_num_per_batch.shape()[0];
msg_sed.meta[2] = bsz;
int max_num_logprobs = logprob_token_ids.shape()[1];
for (int i = 0; i < bsz; i++) {
@@ -146,7 +149,7 @@ void SpeculateSaveOutMmsgTopK(const paddle::Tensor& sampled_token_ids,
auto* cur_scores = &cur_batch_msg_sed->scores[j * (K + 1)];
for (int k = 0; k < K + 1; k++) {
if (k == 0) {
cur_tokens[k] = (int)sampled_token_ids_data[token_offset + j];
cur_tokens[k] = (int)sampled_token_ids_data[i * max_draft_tokens + j];
cur_scores[k] = logprob_scores_data[(token_offset + j) * (K + 1) + k];
} else if (k < max_num_logprobs) {
cur_tokens[k] =
fastdeploy/model_executor/layers/sample/sampler.py
+2 -2
View File
@@ -839,15 +839,15 @@ class SpeculativeSampler(nn.Layer):
raw_logprobs = target_logits.clone()
logprobs_tensors = None
token_ids = share_inputs["accept_tokens"]
if num_logprobs is not None:
token_ids = share_inputs["accept_tokens"]
idx = paddle.arange(share_inputs["accept_tokens"].shape[1], dtype="int32")
mask = idx < share_inputs["accept_num"].unsqueeze(1)
token_ids = paddle.masked_select(share_inputs["accept_tokens"], mask)
logprobs_tensors = self.gather_logprobs(raw_logprobs, num_logprobs, token_ids=token_ids)
sampler_output = SamplerOutput(
sampled_token_ids=token_ids,
sampled_token_ids=share_inputs["accept_tokens"],
logprobs_tensors=logprobs_tensors,
token_num_per_batch=share_inputs["accept_num"],
cu_batch_token_offset=share_inputs["cu_batch_token_offset"],