update the doc

Signed-off-by: Ric Li <[email protected]>

lib/src/mt_instance.c

@@ -56,6 +56,7 @@ int mt_instance_get_lcore(struct mtl_main_impl* impl, unsigned int lcore_id) {
 
   int response = msg.body.response_msg.response;
 
+  /* retuen negative value incase user check with < 0 */
   return -response;
 }
 

manager/README.md

@@ -1,16 +1,31 @@
-# MTL Manager
+# MTL Manager Documentation
 
-Manager is a daemon server running under root privilege. It is responsible for managing the instances of MTL and handling control plane configurations which require high privileges.
+## Overview
+
+![design](manager-design.svg)
+
+MTL Manager is a daemon server designed to operate with root privileges. Its primary role is to manage the lifecycle and configurations of MTL instances. It addresses a variety of administrative tasks, including:
+
+- Lcore Management: Ensures that MTL instances are aware of the lcores used by others, optimizing resource allocation.
+- eBPF/XDP Loader: Dynamically loads and manages eBPF/XDP programs for advanced packet processing and performance tuning.
+- NIC Configuration: Configures Network Interface Cards (NICs) with capabilities like adding or deleting flow and queue settings.
+- Instances Monitor: Continuously monitors MTL instances, providing status reporting and clearing mechanisms.
 
 ## Build
 
+To compile the MTL Manager, use the following commands:
+
 ```bash
 meson setup build
 meson compile -C build
 ```
 
 ## Run
 
+To run the MTL Manager, execute:
+
 ```bash
 sudo ./build/MtlManager
 ```
+
+This command will start the MTL Manager with root privileges, which are necessary for the advanced eBPF and network configurations and management tasks it performs.