CPU util. measurements fix (more accurate and steady)

see #trex-246

1 files changed, 12 insertions, 6 deletions

diff --git a/src/main_dpdk.cpp b/src/main_dpdk.cpp
index 6beb4e3e..0ef83c02 100644
--- a/src/main_dpdk.cpp
+++ b/src/main_dpdk.cpp
@@ -4126,15 +4126,21 @@ void
 CGlobalTRex::handle_fast_path() {
     /* check from messages from DP */
     check_for_dp_messages();
-    // update CPU%
-    m_fl.UpdateFast();
 
-    if (get_is_stateless()) {
-        m_rx_sl.update_cpu_util();
-    }else{
-        m_mg.update_fast();
+    /* measure CPU utilization by sampling (we sample 1000 to get an accurate sampling) */
+    for (int i = 0; i < 1000; i++) {
+        m_fl.UpdateFast();
+
+        if (get_is_stateless()) {
+            m_rx_sl.update_cpu_util();
+        }else{
+            m_mg.update_fast();
+        }
+
+        rte_pause();
     }
 
+
     if ( is_all_cores_finished() ) {
         mark_for_shutdown(SHUTDOWN_TEST_ENDED);
     }