src/hotspot/share/gc/shared/genCollectedHeap.cpp

rev 60257 : [mq]: 8248401-unify-millis-since-last-gc

*** 1360,1398 ****
    if (result != NULL) {
      Copy::aligned_disjoint_words(cast_from_oop<HeapWord*>(obj), result, obj_size);
    }
    return oop(result);
  }
- 
- class GenTimeOfLastGCClosure: public GenCollectedHeap::GenClosure {
-   jlong _time;   // in ms
-   jlong _now;    // in ms
- 
-  public:
-   GenTimeOfLastGCClosure(jlong now) : _time(now), _now(now) { }
- 
-   jlong time() { return _time; }
- 
-   void do_generation(Generation* gen) {
-     _time = MIN2(_time, gen->time_of_last_gc(_now));
-   }
- };
- 
- jlong GenCollectedHeap::millis_since_last_gc() {
-   // javaTimeNanos() is guaranteed to be monotonically non-decreasing
-   // provided the underlying platform provides such a time source
-   // (and it is bug free). So we still have to guard against getting
-   // back a time later than 'now'.
-   jlong now = os::javaTimeNanos() / NANOSECS_PER_MILLISEC;
-   GenTimeOfLastGCClosure tolgc_cl(now);
-   // iterate over generations getting the oldest
-   // time that a generation was collected
-   generation_iterate(&tolgc_cl, false);
- 
-   jlong retVal = now - tolgc_cl.time();
-   if (retVal < 0) {
-     log_warning(gc)("millis_since_last_gc() would return : " JLONG_FORMAT
-        ". returning zero instead.", retVal);
-     return 0;
-   }
-   return retVal;
- }
--- 1360,1364 ----