diff --git a/tools/server/CMakeLists.txt b/tools/server/CMakeLists.txt
index d5c37bff69..7fbca32016 100644
--- a/tools/server/CMakeLists.txt
+++ b/tools/server/CMakeLists.txt
@@ -17,6 +17,8 @@ set(TARGET_SRCS
     server-http.h
     server-task.cpp
     server-task.h
+    server-queue.cpp
+    server-queue.h
     server-common.cpp
     server-common.h
 )
diff --git a/tools/server/server-queue.cpp b/tools/server/server-queue.cpp
new file mode 100644
index 0000000000..e78e72cd60
--- /dev/null
+++ b/tools/server/server-queue.cpp
@@ -0,0 +1,261 @@
+#include "server-common.h"
+#include "server-task.h"
+#include "server-queue.h"
+
+#include <chrono>
+#include <condition_variable>
+#include <deque>
+#include <mutex>
+#include <unordered_set>
+
+//
+// server_queue
+//
+
+int server_queue::post(server_task && task, bool front) {
+    std::unique_lock<std::mutex> lock(mutex_tasks);
+    GGML_ASSERT(task.id != -1);
+    // if this is cancel task make sure to clean up pending tasks
+    if (task.type == SERVER_TASK_TYPE_CANCEL) {
+        cleanup_pending_task(task.id_target);
+    }
+    const int task_id = task.id;
+    QUE_DBG("new task, id = %d, front = %d\n", task_id, front);
+    if (front) {
+        queue_tasks.push_front(std::move(task));
+    } else {
+        queue_tasks.push_back(std::move(task));
+    }
+    condition_tasks.notify_one();
+    return task_id;
+}
+
+int server_queue::post(std::vector<server_task> && tasks, bool front) {
+    std::unique_lock<std::mutex> lock(mutex_tasks);
+    for (auto & task : tasks) {
+        if (task.id == -1) {
+            task.id = id++;
+        }
+        // if this is cancel task make sure to clean up pending tasks
+        if (task.type == SERVER_TASK_TYPE_CANCEL) {
+            cleanup_pending_task(task.id_target);
+        }
+        QUE_DBG("new task, id = %d/%d, front = %d\n", task.id, (int) tasks.size(), front);
+        if (front) {
+            queue_tasks.push_front(std::move(task));
+        } else {
+            queue_tasks.push_back(std::move(task));
+        }
+    }
+    condition_tasks.notify_one();
+    return 0;
+}
+
+void server_queue::defer(server_task && task) {
+    std::unique_lock<std::mutex> lock(mutex_tasks);
+    QUE_DBG("defer task, id = %d\n", task.id);
+    queue_tasks_deferred.push_back(std::move(task));
+    condition_tasks.notify_one();
+}
+
+int server_queue::get_new_id() {
+    std::unique_lock<std::mutex> lock(mutex_tasks);
+    int new_id = id++;
+    return new_id;
+}
+
+void server_queue::on_new_task(std::function<void(server_task &&)> callback) {
+    callback_new_task = std::move(callback);
+}
+
+void server_queue::on_update_slots(std::function<void(void)> callback) {
+    callback_update_slots = std::move(callback);
+}
+
+void server_queue::pop_deferred_task() {
+    std::unique_lock<std::mutex> lock(mutex_tasks);
+    if (!queue_tasks_deferred.empty()) {
+        queue_tasks.emplace_front(std::move(queue_tasks_deferred.front()));
+        queue_tasks_deferred.pop_front();
+    }
+    condition_tasks.notify_one();
+}
+
+void server_queue::terminate() {
+    std::unique_lock<std::mutex> lock(mutex_tasks);
+    running = false;
+    condition_tasks.notify_all();
+}
+
+void server_queue::start_loop() {
+    running = true;
+
+    while (true) {
+        QUE_DBG("%s", "processing new tasks\n");
+
+        while (true) {
+            std::unique_lock<std::mutex> lock(mutex_tasks);
+            if (!running) {
+                QUE_DBG("%s", "terminate\n");
+                return;
+            }
+            if (queue_tasks.empty()) {
+                lock.unlock();
+                break;
+            }
+            server_task task = std::move(queue_tasks.front());
+            queue_tasks.pop_front();
+            lock.unlock();
+
+            QUE_DBG("processing task, id = %d\n", task.id);
+            callback_new_task(std::move(task));
+        }
+
+        // all tasks in the current loop is processed, slots data is now ready
+        QUE_DBG("%s", "update slots\n");
+
+        callback_update_slots();
+
+        QUE_DBG("%s", "waiting for new tasks\n");
+        {
+            std::unique_lock<std::mutex> lock(mutex_tasks);
+            if (!running) {
+                QUE_DBG("%s", "terminate\n");
+                return;
+            }
+            if (queue_tasks.empty()) {
+                condition_tasks.wait(lock, [&]{
+                    return (!queue_tasks.empty() || !running);
+                });
+            }
+        }
+    }
+}
+
+void server_queue::cleanup_pending_task(int id_target) {
+    // no need lock because this is called exclusively by post()
+    auto rm_func = [id_target](const server_task & task) {
+        return task.id == id_target;
+    };
+    queue_tasks.erase(
+        std::remove_if(queue_tasks.begin(),          queue_tasks.end(),          rm_func),
+        queue_tasks.end());
+    queue_tasks_deferred.erase(
+        std::remove_if(queue_tasks_deferred.begin(), queue_tasks_deferred.end(), rm_func),
+        queue_tasks_deferred.end());
+}
+
+//
+// server_response
+//
+
+void server_response::add_waiting_task_id(int id_task) {
+    SRV_DBG("add task %d to waiting list. current waiting = %d (before add)\n", id_task, (int) waiting_task_ids.size());
+
+    std::unique_lock<std::mutex> lock(mutex_results);
+    waiting_task_ids.insert(id_task);
+}
+
+void server_response::add_waiting_tasks(const std::vector<server_task> & tasks) {
+    std::unique_lock<std::mutex> lock(mutex_results);
+
+    for (const auto & task : tasks) {
+        SRV_DBG("add task %d to waiting list. current waiting = %d (before add)\n", task.id, (int) waiting_task_ids.size());
+        waiting_task_ids.insert(task.id);
+    }
+}
+
+void server_response::remove_waiting_task_id(int id_task) {
+    SRV_DBG("remove task %d from waiting list. current waiting = %d (before remove)\n", id_task, (int) waiting_task_ids.size());
+
+    std::unique_lock<std::mutex> lock(mutex_results);
+    waiting_task_ids.erase(id_task);
+    // make sure to clean up all pending results
+    queue_results.erase(
+        std::remove_if(queue_results.begin(), queue_results.end(), [id_task](const server_task_result_ptr & res) {
+            return res->id == id_task;
+        }),
+        queue_results.end());
+}
+
+void server_response::remove_waiting_task_ids(const std::unordered_set<int> & id_tasks) {
+    std::unique_lock<std::mutex> lock(mutex_results);
+
+    for (const auto & id_task : id_tasks) {
+        SRV_DBG("remove task %d from waiting list. current waiting = %d (before remove)\n", id_task, (int) waiting_task_ids.size());
+        waiting_task_ids.erase(id_task);
+    }
+}
+
+server_task_result_ptr server_response::recv(const std::unordered_set<int> & id_tasks) {
+    while (true) {
+        std::unique_lock<std::mutex> lock(mutex_results);
+        condition_results.wait(lock, [&]{
+            if (!running) {
+                SRV_DBG("%s : queue result stop\n", __func__);
+                std::terminate(); // we cannot return here since the caller is HTTP code
+            }
+            return !queue_results.empty();
+        });
+
+        for (size_t i = 0; i < queue_results.size(); i++) {
+            if (id_tasks.find(queue_results[i]->id) != id_tasks.end()) {
+                server_task_result_ptr res = std::move(queue_results[i]);
+                queue_results.erase(queue_results.begin() + i);
+                return res;
+            }
+        }
+    }
+
+    // should never reach here
+}
+
+server_task_result_ptr server_response::recv_with_timeout(const std::unordered_set<int> & id_tasks, int timeout) {
+    while (true) {
+        std::unique_lock<std::mutex> lock(mutex_results);
+
+        for (int i = 0; i < (int) queue_results.size(); i++) {
+            if (id_tasks.find(queue_results[i]->id) != id_tasks.end()) {
+                server_task_result_ptr res = std::move(queue_results[i]);
+                queue_results.erase(queue_results.begin() + i);
+                return res;
+            }
+        }
+
+        std::cv_status cr_res = condition_results.wait_for(lock, std::chrono::seconds(timeout));
+        if (!running) {
+            SRV_DBG("%s : queue result stop\n", __func__);
+            std::terminate(); // we cannot return here since the caller is HTTP code
+        }
+        if (cr_res == std::cv_status::timeout) {
+            return nullptr;
+        }
+    }
+
+    // should never reach here
+}
+
+server_task_result_ptr server_response::recv(int id_task) {
+    std::unordered_set<int> id_tasks = {id_task};
+    return recv(id_tasks);
+}
+
+void server_response::send(server_task_result_ptr && result) {
+    SRV_DBG("sending result for task id = %d\n", result->id);
+
+    std::unique_lock<std::mutex> lock(mutex_results);
+    for (const auto & id_task : waiting_task_ids) {
+        if (result->id == id_task) {
+            SRV_DBG("task id = %d pushed to result queue\n", result->id);
+
+            queue_results.emplace_back(std::move(result));
+            condition_results.notify_all();
+            return;
+        }
+    }
+}
+
+void server_response::terminate() {
+    running = false;
+    condition_results.notify_all();
+}
diff --git a/tools/server/server-queue.h b/tools/server/server-queue.h
new file mode 100644
index 0000000000..7491e07081
--- /dev/null
+++ b/tools/server/server-queue.h
@@ -0,0 +1,112 @@
+#pragma once
+
+#include "server-common.h"
+#include "server-task.h"
+
+#include <chrono>
+#include <condition_variable>
+#include <deque>
+#include <mutex>
+#include <unordered_set>
+
+struct server_queue {
+private:
+    int id = 0;
+    bool running;
+
+    // queues
+    std::deque<server_task> queue_tasks;
+    std::deque<server_task> queue_tasks_deferred;
+
+    std::mutex mutex_tasks;
+    std::condition_variable condition_tasks;
+
+    // callback functions
+    std::function<void(server_task &&)> callback_new_task;
+    std::function<void(void)>           callback_update_slots;
+
+public:
+    // Add a new task to the end of the queue
+    int post(server_task && task, bool front = false);
+
+    // multi-task version of post()
+    int post(std::vector<server_task> && tasks, bool front = false);
+
+    // Add a new task, but defer until one slot is available
+    void defer(server_task && task);
+
+    // Get the next id for creating a new task
+    int get_new_id();
+
+    // Register function to process a new task
+    void on_new_task(std::function<void(server_task &&)> callback);
+
+    // Register the function to be called when all slots data is ready to be processed
+    void on_update_slots(std::function<void(void)> callback);
+
+    // Call when the state of one slot is changed, it will move one task from deferred to main queue
+    void pop_deferred_task();
+
+    // end the start_loop routine
+    void terminate();
+
+    /**
+     * Main loop consists of these steps:
+     * - Wait until a new task arrives
+     * - Process the task (i.e. maybe copy data into slot)
+     * - Check if multitask is finished
+     * - Update all slots
+     */
+    void start_loop();
+
+    // for metrics
+    size_t queue_tasks_deferred_size() {
+        std::unique_lock<std::mutex> lock(mutex_tasks);
+        return queue_tasks_deferred.size();
+    }
+
+private:
+    void cleanup_pending_task(int id_target);
+};
+
+struct server_response {
+private:
+    bool running = true;
+
+    // for keeping track of all tasks waiting for the result
+    std::unordered_set<int> waiting_task_ids;
+
+    // the main result queue (using ptr for polymorphism)
+    std::vector<server_task_result_ptr> queue_results;
+
+    std::mutex mutex_results;
+    std::condition_variable condition_results;
+
+public:
+    // add the id_task to the list of tasks waiting for response
+    void add_waiting_task_id(int id_task);
+
+    void add_waiting_tasks(const std::vector<server_task> & tasks);
+
+    // when the request is finished, we can remove task associated with it
+    void remove_waiting_task_id(int id_task);
+
+    // remove multiple tasks from waiting list
+    void remove_waiting_task_ids(const std::unordered_set<int> & id_tasks);
+
+    // This function blocks the thread until there is a response for one of the id_tasks
+    server_task_result_ptr recv(const std::unordered_set<int> & id_tasks);
+
+    // same as recv(), but have timeout in seconds
+    // if timeout is reached, nullptr is returned
+    server_task_result_ptr recv_with_timeout(const std::unordered_set<int> & id_tasks, int timeout);
+
+    // single-task version of recv()
+    server_task_result_ptr recv(int id_task);
+
+    // Send a new result to a waiting id_task
+    void send(server_task_result_ptr && result);
+
+    // terminate the waiting loop
+    void terminate();
+};
diff --git a/tools/server/server-task.h b/tools/server/server-task.h
index e42488f49c..9539085102 100644
--- a/tools/server/server-task.h
+++ b/tools/server/server-task.h
@@ -1,3 +1,5 @@
+#pragma once
+
 #include "common.h"
 #include "llama.h"
 #include "chat.h"
diff --git a/tools/server/server.cpp b/tools/server/server.cpp
index eeeb171853..f2be9968b9 100644
--- a/tools/server/server.cpp
+++ b/tools/server/server.cpp
@@ -1,6 +1,7 @@
 #include "server-common.h"
 #include "server-http.h"
 #include "server-task.h"
+#include "server-queue.h"
 
 #include "arg.h"
 #include "common.h"
@@ -11,13 +12,9 @@
 #include "mtmd.h"
 
 #include <atomic>
-#include <chrono>
-#include <condition_variable>
 #include <cstddef>
 #include <cinttypes>
-#include <deque>
 #include <memory>
-#include <mutex>
 #include <signal.h>
 #include <thread>
 #include <unordered_set>
@@ -447,303 +444,6 @@ struct server_metrics {
     }
 };
 
-struct server_queue {
-    int id = 0;
-    bool running;
-
-    // queues
-    std::deque<server_task> queue_tasks;
-    std::deque<server_task> queue_tasks_deferred;
-
-    std::mutex mutex_tasks;
-    std::condition_variable condition_tasks;
-
-    // callback functions
-    std::function<void(server_task &&)> callback_new_task;
-    std::function<void(void)>           callback_update_slots;
-
-    // Add a new task to the end of the queue
-    int post(server_task && task, bool front = false) {
-        std::unique_lock<std::mutex> lock(mutex_tasks);
-        GGML_ASSERT(task.id != -1);
-        // if this is cancel task make sure to clean up pending tasks
-        if (task.type == SERVER_TASK_TYPE_CANCEL) {
-            cleanup_pending_task(task.id_target);
-        }
-        const int task_id = task.id;
-        QUE_DBG("new task, id = %d, front = %d\n", task_id, front);
-        if (front) {
-            queue_tasks.push_front(std::move(task));
-        } else {
-            queue_tasks.push_back(std::move(task));
-        }
-        condition_tasks.notify_one();
-        return task_id;
-    }
-
-    // multi-task version of post()
-    int post(std::vector<server_task> && tasks, bool front = false) {
-        std::unique_lock<std::mutex> lock(mutex_tasks);
-        for (auto & task : tasks) {
-            if (task.id == -1) {
-                task.id = id++;
-            }
-            // if this is cancel task make sure to clean up pending tasks
-            if (task.type == SERVER_TASK_TYPE_CANCEL) {
-                cleanup_pending_task(task.id_target);
-            }
-            QUE_DBG("new task, id = %d/%d, front = %d\n", task.id, (int) tasks.size(), front);
-            if (front) {
-                queue_tasks.push_front(std::move(task));
-            } else {
-                queue_tasks.push_back(std::move(task));
-            }
-        }
-        condition_tasks.notify_one();
-        return 0;
-    }
-
-    // Add a new task, but defer until one slot is available
-    void defer(server_task && task) {
-        std::unique_lock<std::mutex> lock(mutex_tasks);
-        QUE_DBG("defer task, id = %d\n", task.id);
-        queue_tasks_deferred.push_back(std::move(task));
-        condition_tasks.notify_one();
-    }
-
-    // Get the next id for creating a new task
-    int get_new_id() {
-        std::unique_lock<std::mutex> lock(mutex_tasks);
-        int new_id = id++;
-        return new_id;
-    }
-
-    // Register function to process a new task
-    void on_new_task(std::function<void(server_task &&)> callback) {
-        callback_new_task = std::move(callback);
-    }
-
-    // Register the function to be called when all slots data is ready to be processed
-    void on_update_slots(std::function<void(void)> callback) {
-        callback_update_slots = std::move(callback);
-    }
-
-    // Call when the state of one slot is changed, it will move one task from deferred to main queue
-    void pop_deferred_task() {
-        std::unique_lock<std::mutex> lock(mutex_tasks);
-        if (!queue_tasks_deferred.empty()) {
-            queue_tasks.emplace_front(std::move(queue_tasks_deferred.front()));
-            queue_tasks_deferred.pop_front();
-        }
-        condition_tasks.notify_one();
-    }
-
-    // end the start_loop routine
-    void terminate() {
-        std::unique_lock<std::mutex> lock(mutex_tasks);
-        running = false;
-        condition_tasks.notify_all();
-    }
-
-    /**
-     * Main loop consists of these steps:
-     * - Wait until a new task arrives
-     * - Process the task (i.e. maybe copy data into slot)
-     * - Check if multitask is finished
-     * - Update all slots
-     */
-    void start_loop() {
-        running = true;
-
-        while (true) {
-            QUE_DBG("%s", "processing new tasks\n");
-
-            while (true) {
-                std::unique_lock<std::mutex> lock(mutex_tasks);
-                if (!running) {
-                    QUE_DBG("%s", "terminate\n");
-                    return;
-                }
-                if (queue_tasks.empty()) {
-                    lock.unlock();
-                    break;
-                }
-                server_task task = std::move(queue_tasks.front());
-                queue_tasks.pop_front();
-                lock.unlock();
-
-                QUE_DBG("processing task, id = %d\n", task.id);
-                callback_new_task(std::move(task));
-            }
-
-            // all tasks in the current loop is processed, slots data is now ready
-            QUE_DBG("%s", "update slots\n");
-
-            callback_update_slots();
-
-            QUE_DBG("%s", "waiting for new tasks\n");
-            {
-                std::unique_lock<std::mutex> lock(mutex_tasks);
-                if (!running) {
-                    QUE_DBG("%s", "terminate\n");
-                    return;
-                }
-                if (queue_tasks.empty()) {
-                    condition_tasks.wait(lock, [&]{
-                        return (!queue_tasks.empty() || !running);
-                    });
-                }
-            }
-        }
-    }
-
-private:
-    void cleanup_pending_task(int id_target) {
-        // no need lock because this is called exclusively by post()
-        auto rm_func = [id_target](const server_task & task) {
-            return task.id == id_target;
-        };
-        queue_tasks.erase(
-            std::remove_if(queue_tasks.begin(),          queue_tasks.end(),          rm_func),
-            queue_tasks.end());
-        queue_tasks_deferred.erase(
-            std::remove_if(queue_tasks_deferred.begin(), queue_tasks_deferred.end(), rm_func),
-            queue_tasks_deferred.end());
-    }
-};
-
-struct server_response {
-    bool running = true;
-
-    // for keeping track of all tasks waiting for the result
-    std::unordered_set<int> waiting_task_ids;
-
-    // the main result queue (using ptr for polymorphism)
-    std::vector<server_task_result_ptr> queue_results;
-
-    std::mutex mutex_results;
-    std::condition_variable condition_results;
-
-    // add the id_task to the list of tasks waiting for response
-    void add_waiting_task_id(int id_task) {
-        SRV_DBG("add task %d to waiting list. current waiting = %d (before add)\n", id_task, (int) waiting_task_ids.size());
-
-        std::unique_lock<std::mutex> lock(mutex_results);
-        waiting_task_ids.insert(id_task);
-    }
-
-    void add_waiting_tasks(const std::vector<server_task> & tasks) {
-        std::unique_lock<std::mutex> lock(mutex_results);
-
-        for (const auto & task : tasks) {
-            SRV_DBG("add task %d to waiting list. current waiting = %d (before add)\n", task.id, (int) waiting_task_ids.size());
-            waiting_task_ids.insert(task.id);
-        }
-    }
-
-    // when the request is finished, we can remove task associated with it
-    void remove_waiting_task_id(int id_task) {
-        SRV_DBG("remove task %d from waiting list. current waiting = %d (before remove)\n", id_task, (int) waiting_task_ids.size());
-
-        std::unique_lock<std::mutex> lock(mutex_results);
-        waiting_task_ids.erase(id_task);
-        // make sure to clean up all pending results
-        queue_results.erase(
-            std::remove_if(queue_results.begin(), queue_results.end(), [id_task](const server_task_result_ptr & res) {
-                return res->id == id_task;
-            }),
-            queue_results.end());
-    }
-
-    void remove_waiting_task_ids(const std::unordered_set<int> & id_tasks) {
-        std::unique_lock<std::mutex> lock(mutex_results);
-
-        for (const auto & id_task : id_tasks) {
-            SRV_DBG("remove task %d from waiting list. current waiting = %d (before remove)\n", id_task, (int) waiting_task_ids.size());
-            waiting_task_ids.erase(id_task);
-        }
-    }
-
-    // This function blocks the thread until there is a response for one of the id_tasks
-    server_task_result_ptr recv(const std::unordered_set<int> & id_tasks) {
-        while (true) {
-            std::unique_lock<std::mutex> lock(mutex_results);
-            condition_results.wait(lock, [&]{
-                if (!running) {
-                    SRV_DBG("%s : queue result stop\n", __func__);
-                    std::terminate(); // we cannot return here since the caller is HTTP code
-                }
-                return !queue_results.empty();
-            });
-
-            for (size_t i = 0; i < queue_results.size(); i++) {
-                if (id_tasks.find(queue_results[i]->id) != id_tasks.end()) {
-                    server_task_result_ptr res = std::move(queue_results[i]);
-                    queue_results.erase(queue_results.begin() + i);
-                    return res;
-                }
-            }
-        }
-
-        // should never reach here
-    }
-
-    // same as recv(), but have timeout in seconds
-    // if timeout is reached, nullptr is returned
-    server_task_result_ptr recv_with_timeout(const std::unordered_set<int> & id_tasks, int timeout) {
-        while (true) {
-            std::unique_lock<std::mutex> lock(mutex_results);
-
-            for (int i = 0; i < (int) queue_results.size(); i++) {
-                if (id_tasks.find(queue_results[i]->id) != id_tasks.end()) {
-                    server_task_result_ptr res = std::move(queue_results[i]);
-                    queue_results.erase(queue_results.begin() + i);
-                    return res;
-                }
-            }
-
-            std::cv_status cr_res = condition_results.wait_for(lock, std::chrono::seconds(timeout));
-            if (!running) {
-                SRV_DBG("%s : queue result stop\n", __func__);
-                std::terminate(); // we cannot return here since the caller is HTTP code
-            }
-            if (cr_res == std::cv_status::timeout) {
-                return nullptr;
-            }
-        }
-
-        // should never reach here
-    }
-
-    // single-task version of recv()
-    server_task_result_ptr recv(int id_task) {
-        std::unordered_set<int> id_tasks = {id_task};
-        return recv(id_tasks);
-    }
-
-    // Send a new result to a waiting id_task
-    void send(server_task_result_ptr && result) {
-        SRV_DBG("sending result for task id = %d\n", result->id);
-
-        std::unique_lock<std::mutex> lock(mutex_results);
-        for (const auto & id_task : waiting_task_ids) {
-            if (result->id == id_task) {
-                SRV_DBG("task id = %d pushed to result queue\n", result->id);
-
-                queue_results.emplace_back(std::move(result));
-                condition_results.notify_all();
-                return;
-            }
-        }
-    }
-
-    // terminate the waiting loop
-    void terminate() {
-        running = false;
-        condition_results.notify_all();
-    }
-};
-
 struct server_context {
     common_params params_base;
 
@@ -1748,7 +1448,7 @@ struct server_context {
                     res->slots_data          = std::move(slots_data);
                     res->n_idle_slots        = n_idle_slots;
                     res->n_processing_slots  = n_processing_slots;
-                    res->n_tasks_deferred    = queue_tasks.queue_tasks_deferred.size();
+                    res->n_tasks_deferred    = queue_tasks.queue_tasks_deferred_size();
                     res->t_start             = metrics.t_start;
 
                     res->n_prompt_tokens_processed_total = metrics.n_prompt_tokens_processed_total;