server : implement universal assisted decoding (#12635)

* llama-server : implement universal assisted decoding

* Erase prompt tail for kv-cache

* set vocab_dft_compatible in common_speculative

* rename ctx_main to ctx_tgt

* move vocab_dft_compatible to spec struct

* clear mem_dft, remove mem

* detokenize id_last for incompatible models

* update comment

* add --spec-replace flag

* accept special tokens when translating between draft/main models

* Escape spec-replace

* clamp draft result to size to params.n_draft

* fix comment

* clean up code

* restore old example

* log common_speculative_are_compatible in speculative example

* fix

* Update common/speculative.cpp

Co-authored-by: Georgi Gerganov <ggerganov@gmail.com>

* Update common/speculative.cpp

Co-authored-by: Georgi Gerganov <ggerganov@gmail.com>

* Update common/speculative.cpp

Co-authored-by: Georgi Gerganov <ggerganov@gmail.com>

---------

Co-authored-by: Georgi Gerganov <ggerganov@gmail.com>
This commit is contained in:
g2mt
2025-07-31 05:25:23 -07:00
committed by GitHub
parent c1dacaa99b
commit 94933c8c2e
6 changed files with 168 additions and 62 deletions

View File

@@ -201,6 +201,7 @@ struct common_params_speculative {
int32_t n_gpu_layers = -1; // number of layers to store in VRAM for the draft model (-1 - use default)
float p_split = 0.1f; // speculative decoding split probability
float p_min = 0.75f; // minimum speculative decoding probability (greedy)
std::vector<std::pair<std::string, std::string>> replacements; // main to speculative model replacements
ggml_type cache_type_k = GGML_TYPE_F16; // KV cache data type for the K
ggml_type cache_type_v = GGML_TYPE_F16; // KV cache data type for the V