server UPDATE make thread and poll configurable

Since the commit in the link, some performance issues could be observed.
Make the thread count and sleep times configurable to avoid this.

Link: 5391a73
Signed-off-by: Jeremie Leska <[email protected]>

Author: jeremie6wind

CMakeLists.txt

@@ -80,6 +80,8 @@ option(NETOPEER2_LIB_TESTS "Include server tests in netopeer2 library" ON)
 set(SSH_AUTHORIZED_KEYS_FORMAT "%h/.ssh/authorized_keys" CACHE STRING "sshd-like pattern (with '%h', '%u', '%U') for determining path to users' SSH authorized_keys file.")
 set(THREAD_COUNT 3 CACHE STRING "Number of threads accepting new sessions and handling requests")
 set(POLL_IO_TIMEOUT 10 CACHE STRING "Timeout in milliseconds of polling sessions for new data. It is also used for synchronization of low level IO such as sending a reply while a notification is being sent")
+set(PS_BACKOFF_SLEEP 30 CACHE STRING "Timeout in milliseconds of polling sessions backoff sleep")
+
 set(YANG_MODULE_DIR "${CMAKE_INSTALL_PREFIX}/${CMAKE_INSTALL_DATADIR}/yang/modules/netopeer2" CACHE STRING "Directory where to copy the YANG modules to")
 set(DATA_DIR "${CMAKE_INSTALL_PREFIX}/${CMAKE_INSTALL_DATADIR}/netopeer2" CACHE STRING "Directory with shared netopeer2 data")
 

src/config.h.in

@@ -59,7 +59,7 @@
 /** @brief Timeout for PS structure accessing in
  * case there is too much contention (ms).
  */
-#define NP2SRV_PS_BACKOFF_SLEEP 30
+#define NP2SRV_PS_BACKOFF_SLEEP @PS_BACKOFF_SLEEP@
 
 /** @brief Sleep time when terminating sub-ntf subscriptions
  * to give a chance for another threads to wake up (ms).