llama-router: separate PROCESS (OS) and BACKEND (HTTP) polling constants

ROUTER_POLL_INTERVAL_MS -> ROUTER_PROCESS_POLL_INTERVAL_MS
PROCESS = OS operations (PID, fork, kill)
BACKEND = HTTP operations (health, readiness)
Adjust timeouts: 2s shutdown, 60s ready, 100ms polls

Author: ServeurpersoCom

tools/router/ARCHITECTURE.md

@@ -93,7 +93,7 @@ This aligns with the project philosophy: **everything configurable at runtime, z
 
 - **Spawn**: `fork()`/`CreateProcess()` with stdout/stderr capture
 - **Health polling**: `ROUTER_BACKEND_HEALTH_POLL_MS` intervals, `ROUTER_BACKEND_READY_TIMEOUT_MS` timeout
-- **Graceful shutdown**: SIGTERM → wait `ROUTER_PROCESS_SHUTDOWN_TIMEOUT_MS` → SIGKILL → poll every `ROUTER_POLL_INTERVAL_MS` until exit
+- **Graceful shutdown**: SIGTERM → wait `ROUTER_PROCESS_SHUTDOWN_TIMEOUT_MS` → SIGKILL → poll every `ROUTER_PROCESS_POLL_INTERVAL_MS` until exit
 - **Cleanup**: File descriptors closed, waitpid() called
 
 ---

tools/router/router-constants.h

@@ -1,13 +1,13 @@
 #pragma once
 
+// Polling interval in milliseconds used for backend health checks during startup.
+#define ROUTER_BACKEND_HEALTH_POLL_MS 100
+
 // Polling interval in milliseconds used for process exit checks and shutdown loops.
-#define ROUTER_POLL_INTERVAL_MS 100
+#define ROUTER_PROCESS_POLL_INTERVAL_MS 100
 
 // Maximum time in milliseconds to wait for a process to terminate gracefully before forcing shutdown.
-#define ROUTER_PROCESS_SHUTDOWN_TIMEOUT_MS 1000
+#define ROUTER_PROCESS_SHUTDOWN_TIMEOUT_MS 2000
 
 // Maximum time in milliseconds to wait for a backend to report readiness.
-#define ROUTER_BACKEND_READY_TIMEOUT_MS 10000
-
-// Polling interval in milliseconds used for backend health checks during startup.
-#define ROUTER_BACKEND_HEALTH_POLL_MS 200
+#define ROUTER_BACKEND_READY_TIMEOUT_MS 60000

tools/router/router-process.cpp

@@ -63,7 +63,7 @@ bool wait_for_process_exit(const ProcessHandle & handle, int timeout_ms) {
         if (std::chrono::duration_cast<std::chrono::milliseconds>(elapsed).count() > timeout_ms) {
             return false;
         }
-        std::this_thread::sleep_for(std::chrono::milliseconds(ROUTER_POLL_INTERVAL_MS));
+        std::this_thread::sleep_for(std::chrono::milliseconds(ROUTER_PROCESS_POLL_INTERVAL_MS));
     }
 #endif
 }
@@ -133,7 +133,7 @@ void terminate_process(ProcessHandle & handle) {
         LOG_ERR("Process pid=%d did not terminate, sending SIGKILL\n", static_cast<int>(handle.pid));
         kill(handle.pid, SIGKILL);
         while (process_running(handle)) {
-            std::this_thread::sleep_for(std::chrono::milliseconds(ROUTER_POLL_INTERVAL_MS));
+            std::this_thread::sleep_for(std::chrono::milliseconds(ROUTER_PROCESS_POLL_INTERVAL_MS));
         }
     }
     close_process(handle);