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llama.cpp
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server : [easy] fix per round speculative decode logging (#18211) 

Currently we always log 0, as we clear slot.drafted before.

To reproduce:
Run llama-server with devstral-2 as main model and devstral-2-small as
md, and verbose logging:

```
% ./build/bin/llama-server -v  \
  -m ~/llms/Devstral-2-123B-Instruct-2512-UD-Q6_K_XL-00001-of-00003.gguf \
  -md ~/llms/Devstral-Small-2-24B-Instruct-2512-UD-Q2_K_XL.gguf \
  -c 8192 2> /tmp/llama.cpp.debug

Check the log:

slot update_slots: id  3 | task 0 | accepted 11/0 draft tokens, new
n_tokens = 741
slot update_slots: id  3 | task 0 | accepted 4/0 draft tokens, new
n_tokens = 746
slot update_slots: id  3 | task 0 | accepted 16/0 draft tokens, new
n_tokens = 763
slot update_slots: id  3 | task 0 | accepted 11/0 draft tokens, new
n_tokens = 775
slot update_slots: id  3 | task 0 | accepted 2/0 draft tokens, new
n_tokens = 778
slot update_slots: id  3 | task 0 | accepted 4/0 draft tokens, new
n_tokens = 783
slot update_slots: id  3 | task 0 | accepted 8/0 draft tokens, new
n_tokens = 792
slot update_slots: id  3 | task 0 | accepted 2/0 draft tokens, new
n_tokens = 795
slot update_slots: id  3 | task 0 | accepted 1/0 draft tokens, new
n_tokens = 797
slot update_slots: id  3 | task 0 | accepted 1/0 draft tokens, new
n_tokens = 799
slot update_slots: id  3 | task 0 | accepted 0/0 draft tokens, new
n_tokens = 800
slot update_slots: id  3 | task 0 | accepted 2/0 draft tokens, new
n_tokens = 803
slot update_slots: id  3 | task 0 | accepted 1/0 draft tokens, new
n_tokens = 805
slot update_slots: id  3 | task 0 | accepted 6/0 draft tokens, new
n_tokens = 812
slot update_slots: id  3 | task 0 | accepted 3/0 draft tokens, new
n_tokens = 816
```

After the fix, get correct per round logging:

```
slot update_slots: id  3 | task 0 | accepted 7/8 draft tokens, new
n_tokens = 654
slot update_slots: id  3 | task 0 | accepted 1/2 draft tokens, new
n_tokens = 656
slot update_slots: id  3 | task 0 | accepted 2/16 draft tokens, new
n_tokens = 659
slot update_slots: id  3 | task 0 | accepted 1/16 draft tokens, new
n_tokens = 661
slot update_slots: id  3 | task 0 | accepted 2/16 draft tokens, new
n_tokens = 664
slot update_slots: id  3 | task 0 | accepted 16/16 draft tokens, new
n_tokens = 681
slot update_slots: id  3 | task 0 | accepted 16/16 draft tokens, new
n_tokens = 698
slot update_slots: id  3 | task 0 | accepted 3/4 draft tokens, new
n_tokens = 702
slot update_slots: id  3 | task 0 | accepted 5/12 draft tokens, new
n_tokens = 708
slot update_slots: id  3 | task 0 | accepted 16/16 draft tokens, new
n_tokens = 725
slot update_slots: id  3 | task 0 | accepted 1/1 draft tokens, new
n_tokens = 727
slot update_slots: id  3 | task 0 | accepted 8/16 draft tokens, new
n_tokens = 736
```
This commit is contained in:
Oleksandr Kuvshynov 2025-12-20 04:57:40 -05:00 committed by GitHub
parent 9e39a1e6a9
commit 408616adbd
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1 changed files with 1 additions and 1 deletions
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tools/server/server-context.cpp
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@ -2628,7 +2628,7 @@ struct server_context_impl {
}
}
SLT_DBG(slot, "accepted %d/%d draft tokens, new n_tokens = %d\n", (int) ids.size() - 1, (int) slot.drafted.size(), slot.prompt.n_tokens());
SLT_DBG(slot, "accepted %d/%d draft tokens, new n_tokens = %d\n", (int) ids.size() - 1, (int) n_draft, slot.prompt.n_tokens());
}
}