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Feat/unload model api #97

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Feat/unload model api #97

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a4b7226
Add api to unload model
thunhu99 Oct 31, 2023
3d81378
set context and model back to nullptr after delete
thunhu99 Oct 31, 2023
b617433
Merge branch 'janhq:main' into feat/unload-model-api
thunhuanh Nov 2, 2023
af3bdb9
fix wrong api endpoind - handler mapping
thunhu99 Nov 2, 2023
29411b5
Merge branch 'feat/unload-model-api' of https://github.com/thunhuanh/…
thunhu99 Nov 2, 2023
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13 changes: 13 additions & 0 deletions controllers/llamaCPP.cc
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Original file line number Diff line number Diff line change
Expand Up @@ -344,3 +344,16 @@ void llamaCPP::loadModel(
warmupModel();
callback(resp);
}

void inferences::llamaCPP::unloadModel(const HttpRequestPtr &req, std::function<void(const HttpResponsePtr &)> &&callback)
{
Json::Value jsonResp;
jsonResp["message"] = "No model loaded";
if (model_loaded) {
llama.unloadModel();
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As I tested, the server stops working after this line.
The below lines do not execute to return result

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Oh, sorry my mistake. The API endpoint map to the wrong handler:
it should be METHOD_ADD(llamaCPP::unloadModel, "unloadmodel", Delete);
instead of METHOD_ADD(llamaCPP::loadModel, "unloadmodel", Delete);

model_loaded = false;
jsonResp["message"] = "Model unloaded successfully";
}
auto resp = nitro_utils::nitroHttpJsonResponse(jsonResp);
callback(resp);
}
11 changes: 11 additions & 0 deletions controllers/llamaCPP.h
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Original file line number Diff line number Diff line change
Expand Up @@ -260,6 +260,13 @@ struct llama_server_context {
return true;
}

void unloadModel() {
llama_free(ctx);
llama_free_model(model);
ctx = nullptr;
model = nullptr;
}

std::vector<llama_token> tokenize(const json &json_prompt,
bool add_bos) const {
// If `add_bos` is true, we only add BOS, when json_prompt is a string,
Expand Down Expand Up @@ -1272,6 +1279,7 @@ class llamaCPP : public drogon::HttpController<llamaCPP> {
METHOD_ADD(llamaCPP::chatCompletion, "chat_completion", Post);
METHOD_ADD(llamaCPP::embedding, "embedding", Post);
METHOD_ADD(llamaCPP::loadModel, "loadmodel", Post);
METHOD_ADD(llamaCPP::unloadModel, "unloadmodel", Delete);
// PATH_ADD("/llama/chat_completion", Post);
METHOD_LIST_END
void chatCompletion(const HttpRequestPtr &req,
Expand All @@ -1282,6 +1290,9 @@ class llamaCPP : public drogon::HttpController<llamaCPP> {
std::function<void(const HttpResponsePtr &)> &&callback);
void warmupModel();

void unloadModel(const HttpRequestPtr &req,
std::function<void(const HttpResponsePtr &)> &&callback);

private:
llama_server_context llama;
bool model_loaded = false;
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