feat: Add more logs for llamaCPP and llama_server

context/llama_server_context.h

@@ -532,7 +532,7 @@ struct llama_server_context {
 
     std::tie(model, ctx) = llama_init_from_gpt_params(params);
     if (model == nullptr) {
-      LOG_ERROR_LLAMA("unable to load model", {{"model", params.model}});
+      LOG_ERROR_LLAMA("llama.cpp unable to load model", {{"model", params.model}});
       return false;
     }
 
@@ -551,6 +551,10 @@ struct llama_server_context {
       }
     }
 
+    if (ctx == nullptr) {
+      LOG_ERROR_LLAMA("Unable to get llama.cpp context", {});
+      return false;
+    }
     n_ctx = llama_n_ctx(ctx);
 
     add_bos_token = llama_should_add_bos_token(model);
@@ -578,7 +582,11 @@ struct llama_server_context {
       slots.push_back(slot);
     }
 
-    batch = llama_batch_init(n_ctx, 0, params.n_parallel);
+    try {
+      batch = llama_batch_init(n_ctx, 0, params.n_parallel);
+    } catch (const std::exception& e) {
+      LOG_ERROR_LLAMA("Failed to allocate llama.cpp batch metadata" , {{"exception", e.what()}, {"n_tokens_alloc", n_ctx}, {"embd", 0}, {"n_seq_max", params.n_parallel}});
+    }
 
     // empty system prompt
     system_prompt = "";
@@ -1296,7 +1304,9 @@ struct llama_server_context {
         }
 
         if (queue_results[i].id == task_id) {
-          assert(queue_results[i].multitask_id == -1);
+          if (queue_results[i].multitask_id != -1) {
+            LOG_ERROR_LLAMA("Incorrect multitask ID", {{"task_id", task_id}});
+          }
           task_result res = queue_results[i];
           queue_results.erase(queue_results.begin() + i);
           return res;

controllers/llamaCPP.cc

@@ -3,14 +3,13 @@
 #include <fstream>
 #include <iostream>
 #include "log.h"
+#include "utils/nitro_utils.h"
+#include "utils/logging_utils.h"
 
 // External
 #include "common.h"
 #include "llama.h"
 
-#include "log.h"
-#include "utils/nitro_utils.h"
-
 using namespace inferences;
 using json = nlohmann::json;
 
@@ -50,6 +49,7 @@ std::shared_ptr<inferenceState> create_inference_state(llamaCPP* instance) {
 bool llamaCPP::CheckModelLoaded(
     std::function<void(const HttpResponsePtr&)>& callback) {
   if (!llama.model_loaded_external) {
+    LOG_ERROR << "Model has not been loaded";
     Json::Value jsonResp;
     jsonResp["message"] =
         "Model has not been loaded, please load model into nitro";
@@ -159,6 +159,7 @@ llamaCPP::~llamaCPP() {
 void llamaCPP::WarmupModel() {
   json pseudo;
 
+  LOG_INFO << "Warm-up model";
   pseudo["prompt"] = "Hello";
   pseudo["n_predict"] = 2;
   pseudo["stream"] = false;
@@ -187,6 +188,8 @@ void llamaCPP::InferenceImpl(
     inferences::ChatCompletionRequest&& completion,
     std::function<void(const HttpResponsePtr&)>& callback) {
   std::string formatted_output = pre_prompt;
+  int request_id = ++no_of_requests;
+  LOG_INFO_REQUEST(request_id) << "Generating reponse for inference request";
 
   json data;
   json stopWords;
@@ -196,9 +199,9 @@ void llamaCPP::InferenceImpl(
   // Increase number of chats received and clean the prompt
   no_of_chats++;
   if (no_of_chats % clean_cache_threshold == 0) {
-    LOG_INFO << "Clean cache threshold reached!";
+    LOG_INFO_REQUEST(request_id) << "Clean cache threshold reached!";
     llama.kv_cache_clear();
-    LOG_INFO << "Cache cleaned";
+    LOG_INFO_REQUEST(request_id) << "Cache cleaned";
   }
 
   // Default values to enable auto caching
@@ -207,9 +210,7 @@ void llamaCPP::InferenceImpl(
 
   // Passing load value
   data["repeat_last_n"] = this->repeat_last_n;
-
-  LOG_INFO << "Messages:" << completion.messages.toStyledString();
-  LOG_INFO << "Stop:" << completion.stop.toStyledString();
+  LOG_INFO_REQUEST(request_id) << "Stop words:" << completion.stop.toStyledString();
 
   data["stream"] = completion.stream;
   data["n_predict"] = completion.max_tokens;
@@ -268,18 +269,18 @@ void llamaCPP::InferenceImpl(
             auto image_url = content_piece["image_url"]["url"].asString();
             std::string base64_image_data;
             if (image_url.find("http") != std::string::npos) {
-              LOG_INFO << "Remote image detected but not supported yet";
+              LOG_INFO_REQUEST(request_id) << "Remote image detected but not supported yet";
             } else if (image_url.find("data:image") != std::string::npos) {
-              LOG_INFO << "Base64 image detected";
+              LOG_INFO_REQUEST(request_id) << "Base64 image detected";
               base64_image_data = nitro_utils::extractBase64(image_url);
-              LOG_INFO << base64_image_data;
+              LOG_INFO_REQUEST(request_id) << base64_image_data;
             } else {
-              LOG_INFO << "Local image detected";
+              LOG_INFO_REQUEST(request_id) << "Local image detected";
               nitro_utils::processLocalImage(
                   image_url, [&](const std::string& base64Image) {
                     base64_image_data = base64Image;
                   });
-              LOG_INFO << base64_image_data;
+              LOG_INFO_REQUEST(request_id) << base64_image_data;
             }
             content_piece_image_data["data"] = base64_image_data;
 
@@ -306,7 +307,7 @@ void llamaCPP::InferenceImpl(
       }
     }
     formatted_output += ai_prompt;
-    LOG_INFO << formatted_output;
+    LOG_INFO_REQUEST(request_id) << formatted_output;
   }
 
   data["prompt"] = formatted_output;
@@ -322,35 +323,36 @@ void llamaCPP::InferenceImpl(
   bool is_streamed = data["stream"];
 // Enable full message debugging
 #ifdef DEBUG
-  LOG_INFO << "Current completion text";
-  LOG_INFO << formatted_output;
+  LOG_INFO_REQUEST(request_id) << "Current completion text";
+  LOG_INFO_REQUEST(request_id) << formatted_output;
 #endif
 
   if (is_streamed) {
+    LOG_INFO_REQUEST(request_id) << "Streamed, waiting for respone";
     auto state = create_inference_state(this);
     auto chunked_content_provider =
-        [state, data](char* pBuffer, std::size_t nBuffSize) -> std::size_t {
+        [state, data, request_id](char* pBuffer, std::size_t nBuffSize) -> std::size_t {
       if (state->inference_status == PENDING) {
         state->inference_status = RUNNING;
       } else if (state->inference_status == FINISHED) {
         return 0;
       }
 
       if (!pBuffer) {
-        LOG_INFO << "Connection closed or buffer is null. Reset context";
+        LOG_WARN_REQUEST(request_id) "Connection closed or buffer is null. Reset context";
         state->inference_status = FINISHED;
         return 0;
       }
 
       if (state->inference_status == EOS) {
-        LOG_INFO << "End of result";
+        LOG_INFO_REQUEST(request_id) << "End of result";
         const std::string str =
             "data: " +
             create_return_json(nitro_utils::generate_random_string(20), "_", "",
                                "stop") +
             "\n\n" + "data: [DONE]" + "\n\n";
 
-        LOG_VERBOSE("data stream", {{"to_send", str}});
+        LOG_VERBOSE("data stream", {{"request_id": request_id}, {"to_send", str}});
         std::size_t nRead = std::min(str.size(), nBuffSize);
         memcpy(pBuffer, str.data(), nRead);
         state->inference_status = FINISHED;
@@ -370,7 +372,7 @@ void llamaCPP::InferenceImpl(
         memcpy(pBuffer, str.data(), nRead);
 
         if (result.stop) {
-          LOG_INFO << "reached result stop";
+          LOG_INFO_REQUEST(request_id) << "Reached result stop";
           state->inference_status = EOS;
           return nRead;
         }
@@ -383,14 +385,14 @@ void llamaCPP::InferenceImpl(
 
         return nRead;
       } else {
-        LOG_INFO << "Error during inference";
+        LOG_ERROR_REQUEST(request_id) << "Error during inference";
       }
       state->inference_status = FINISHED;
       return 0;
     };
     // Queued task
     state->instance->queue->runTaskInQueue(
-        [callback, state, data, chunked_content_provider]() {
+        [callback, state, data, chunked_content_provider, request_id]() {
           state->task_id =
               state->instance->llama.request_completion(data, false, false, -1);
 
@@ -410,22 +412,22 @@ void llamaCPP::InferenceImpl(
               retries += 1;
             }
             if (state->inference_status != RUNNING)
-              LOG_INFO << "Wait for task to be released:" << state->task_id;
+              LOG_INFO_REQUEST(request_id) << "Wait for task to be released:" << state->task_id;
             std::this_thread::sleep_for(std::chrono::milliseconds(100));
           }
-          LOG_INFO << "Task completed, release it";
+          LOG_INFO_REQUEST(request_id) << "Task completed, release it";
           // Request completed, release it
           state->instance->llama.request_cancel(state->task_id);
+          LOG_INFO_REQUEST(request_id) << "Inference completed";
         });
   } else {
     Json::Value respData;
     auto resp = nitro_utils::nitroHttpResponse();
     int task_id = llama.request_completion(data, false, false, -1);
-    LOG_INFO << "sent the non stream, waiting for respone";
+    LOG_INFO_REQUEST(request_id) << "Non stream, waiting for respone";
     if (!json_value(data, "stream", false)) {
       std::string completion_text;
       task_result result = llama.next_result(task_id);
-      LOG_INFO << "Here is the result:" << result.error;
       if (!result.error && result.stop) {
         int prompt_tokens = result.result_json["tokens_evaluated"];
         int predicted_tokens = result.result_json["tokens_predicted"];
@@ -435,9 +437,12 @@ void llamaCPP::InferenceImpl(
                                     prompt_tokens, predicted_tokens);
         resp->setBody(full_return);
       } else {
-        resp->setBody("Internal error during inference");
+        respData["message"] = "Internal error during inference";
+        resp = nitro_utils::nitroHttpJsonResponse(respData);
+        LOG_ERROR_REQUEST(request_id) << "Error during inference";
       }
       callback(resp);
+      LOG_INFO_REQUEST(request_id) << "Inference completed";
     }
   }
 }
@@ -458,10 +463,12 @@ void llamaCPP::Embedding(
 void llamaCPP::EmbeddingImpl(
     std::shared_ptr<Json::Value> jsonBody,
     std::function<void(const HttpResponsePtr&)>& callback) {
+  int request_id = ++no_of_requests;
+  LOG_INFO_REQUEST(request_id) << "Generating reponse for embedding request";
   // Queue embedding task
   auto state = create_inference_state(this);
 
-  state->instance->queue->runTaskInQueue([this, state, jsonBody, callback]() {
+  state->instance->queue->runTaskInQueue([this, state, jsonBody, callback, request_id]() {
     Json::Value responseData(Json::arrayValue);
 
     if (jsonBody->isMember("input")) {
@@ -502,50 +509,58 @@ void llamaCPP::EmbeddingImpl(
     resp->setBody(Json::writeString(Json::StreamWriterBuilder(), root));
     resp->setContentTypeString("application/json");
     callback(resp);
+    LOG_INFO_REQUEST(request_id) << "Embedding completed";
   });
 }
 
 void llamaCPP::UnloadModel(
     const HttpRequestPtr& req,
     std::function<void(const HttpResponsePtr&)>&& callback) {
   Json::Value jsonResp;
-  jsonResp["message"] = "No model loaded";
-  if (llama.model_loaded_external) {
+  if (CheckModelLoaded(callback)) {
     StopBackgroundTask();
 
     llama_free(llama.ctx);
     llama_free_model(llama.model);
     llama.ctx = nullptr;
     llama.model = nullptr;
     jsonResp["message"] = "Model unloaded successfully";
+    auto resp = nitro_utils::nitroHttpJsonResponse(jsonResp);
+    callback(resp);
+    LOG_INFO << "Model unloaded successfully";
   }
-  auto resp = nitro_utils::nitroHttpJsonResponse(jsonResp);
-  callback(resp);
-  return;
 }
 
 void llamaCPP::ModelStatus(
     const HttpRequestPtr& req,
     std::function<void(const HttpResponsePtr&)>&& callback) {
   Json::Value jsonResp;
   bool is_model_loaded = llama.model_loaded_external;
-  if (is_model_loaded) {
+  if (CheckModelLoaded(callback)) {
     jsonResp["model_loaded"] = is_model_loaded;
     jsonResp["model_data"] = llama.get_model_props().dump();
-  } else {
-    jsonResp["model_loaded"] = is_model_loaded;
-  }
-
-  auto resp = nitro_utils::nitroHttpJsonResponse(jsonResp);
-  callback(resp);
-  return;
+    auto resp = nitro_utils::nitroHttpJsonResponse(jsonResp);
+    callback(resp);
+    LOG_INFO << "Model status responded";
+  } 
 }
 
 void llamaCPP::LoadModel(
     const HttpRequestPtr& req,
     std::function<void(const HttpResponsePtr&)>&& callback) {
+
+  if (!nitro_utils::isAVX2Supported() && ggml_cpu_has_avx2()) {
+    LOG_ERROR << "AVX2 is not supported by your processor";
+    Json::Value jsonResp;
+    jsonResp["message"] = "AVX2 is not supported by your processor, please download and replace the correct Nitro asset version";
+    auto resp = nitro_utils::nitroHttpJsonResponse(jsonResp);
+    resp->setStatusCode(drogon::k500InternalServerError);
+    callback(resp);    
+    return;
+  }
+
   if (llama.model_loaded_external) {
-    LOG_INFO << "model loaded";
+    LOG_INFO << "Model already loaded";
     Json::Value jsonResp;
     jsonResp["message"] = "Model already loaded";
     auto resp = nitro_utils::nitroHttpJsonResponse(jsonResp);
@@ -568,6 +583,7 @@ void llamaCPP::LoadModel(
     jsonResp["message"] = "Model loaded successfully";
     auto resp = nitro_utils::nitroHttpJsonResponse(jsonResp);
     callback(resp);
+    LOG_INFO << "Model loaded successfully";
   }
 }
 
@@ -602,7 +618,17 @@ bool llamaCPP::LoadModelImpl(std::shared_ptr<Json::Value> jsonBody) {
       }
     };
 
-    params.model = jsonBody->operator[]("llama_model_path").asString();
+    Json::Value model_path = jsonBody->operator[]("llama_model_path");
+    if (model_path.isNull()) {
+      LOG_ERROR << "Missing model path in request";
+    } else {
+      if (std::filesystem::exists(std::filesystem::path(model_path.asString()))) {
+        params.model = model_path.asString();
+      } else {
+        LOG_ERROR << "Could not find model in path " << model_path.asString();
+      }
+    }
+
     params.n_gpu_layers = jsonBody->get("ngl", 100).asInt();
     params.n_ctx = jsonBody->get("ctx_len", 2048).asInt();
     params.embedding = jsonBody->get("embedding", true).asBool();
@@ -681,7 +707,7 @@ void llamaCPP::StopBackgroundTask() {
   if (llama.model_loaded_external) {
     llama.model_loaded_external = false;
     llama.condition_tasks.notify_one();
-    LOG_INFO << "changed to false";
+    LOG_INFO << "Background task stopped! ";
     if (backgroundThread.joinable()) {
       backgroundThread.join();
     }

controllers/llamaCPP.h

@@ -85,6 +85,7 @@ class llamaCPP : public drogon::HttpController<llamaCPP>,
   std::string pre_prompt;
   int repeat_last_n;
   bool caching_enabled;
+  std::atomic<int> no_of_requests = 0;
   std::atomic<int> no_of_chats = 0;
   int clean_cache_threshold;
   std::string grammar_file_content;

utils/logging_utils.h

@@ -0,0 +1,5 @@
+#pragma once
+
+#define LOG_INFO_REQUEST(RID) LOG_INFO << "Request " << RID << ": " 
+#define LOG_WARN_REQUEST(RID) LOG_WARN << "Request " << RID << ": " 
+#define LOG_ERROR_REQUEST(RID) LOG_ERROR << "Request " << RID << ": "