From: imarom <imarom@cisco.com>
Date: Wed, 2 Mar 2016 12:37:58 +0000 (+0200)
Subject: brief/deep sleep for DP cores
X-Git-Url: https://gerrit.fd.io/r/gitweb?a=commitdiff_plain;h=9c62e2a6f114d99a7271e259bad2601a28cd9c4a;p=trex.git

brief/deep sleep for DP cores
---

diff --git a/src/stateless/dp/trex_stateless_dp_core.cpp b/src/stateless/dp/trex_stateless_dp_core.cpp
index 19eface1..f8d6d828 100644
--- a/src/stateless/dp/trex_stateless_dp_core.cpp
+++ b/src/stateless/dp/trex_stateless_dp_core.cpp
@@ -394,12 +394,27 @@ bool TrexStatelessDpCore::set_stateless_next_node(CGenNodeStateless * cur_node,
 void 
 TrexStatelessDpCore::idle_state_loop() {
 
+    const int SHORT_DELAY_MS    = 2;
+    const int LONG_DELAY_MS     = 50;
+    const int DEEP_SLEEP_LIMIT  = 2000;
+
+    int counter = 0;
+
     while (m_state == STATE_IDLE) {
         bool had_msg = periodic_check_for_cp_messages();
-        /* if no message - backoff for some time */
-        if (!had_msg) {
-            delay(200);
+        if (had_msg) {
+            counter = 0;
+            continue;
+        }
+
+        /* enter deep sleep only if enough time had passed */
+        if (counter < DEEP_SLEEP_LIMIT) {
+            delay(SHORT_DELAY_MS);
+            counter++;
+        } else {
+            delay(LONG_DELAY_MS);
         }
+        
     }
 }