archive/jdk
1
0
Fork 0
mirror of https://github.com/openjdk/jdk.git synced 2025-08-26 14:24:46 +02:00
Code Issues Projects Releases Packages Wiki Activity Actions

7129514: time warp warnings after 7117303

Browse source 
Replace calls to os::javaTimeMillis() that are used to update the milliseconds since the last GC to an equivalent that uses a monotonically non-decreasing time source.

Reviewed-by: ysr, jmasa
This commit is contained in:
John Cuthbertson 2012-01-18 09:50:16 -08:00
parent 6a31970946
commit fa9d6d7682
4 changed files with 23 additions and 6 deletions
Download patch file Download diff file Expand all files Collapse all files

6
hotspot/src/share/vm/gc_implementation/concurrentMarkSweep/concurrentMarkSweepGeneration.cpp
View file

@ -6092,7 +6092,11 @@ void CMSCollector::sweep(bool asynch) {
_inter_sweep_timer.reset();
_inter_sweep_timer.start();
update_time_of_last_gc(os::javaTimeMillis());
// We need to use a monotonically non-deccreasing time in ms
// or we will see time-warp warnings and os::javaTimeMillis()
// does not guarantee monotonicity.
jlong now = os::javaTimeNanos() / NANOSECS_PER_MILLISEC;
update_time_of_last_gc(now);
// NOTE on abstract state transitions:
// Mutators allocate-live and/or mark the mod-union table dirty