Changeset 337 for trunk/kernel/kern/core.c

Timestamp:

Aug 7, 2017, 12:50:17 PM (7 years ago)

Author:

alain

Message:

Introduce the delayed context switch if current thread has a lock.

File:

• trunk/kernel/kern/core.c (modified) (1 diff)

trunk/kernel/kern/core.c

@@ -117 +117 @@
         if( (ticks % 10) == 0 ) sched_yield( NULL );
 
+/*
+    // compute elapsed time, taking into account 32 bits register wrap
+    uint32_t elapsed;
+    uint32_t time_now   = hal_get_cycles();
+    uint32_t time_last  = this->time_last_check;
+    if( time_now < time_last ) elapsed = (0xFFFFFFFF - time_last) + time_now;
+        else                       elapsed = time_now - time_last;
+
+    // update thread time
+    this->time_last_check = time_now;
+
+        // check elapsed time
+        if( elapsed < CONFIG_CORE_CHECK_EVERY ) return false;
+    else                                    return true;
+*/
+
         // update DQDT TODO  This update should depend on the cluster identifier,
         // to avoid simultaneous updates from various clusters ... AG