6934758: Expose the break down of clean up task time during safepoint.
Summary: Use -XX:+TraceSafepointCleanupTime to print out the details of each clean up tasks.
Reviewed-by: dholmes, ysr
--- a/hotspot/src/share/vm/runtime/globals.hpp Fri Mar 12 10:42:16 2010 -0500
+++ b/hotspot/src/share/vm/runtime/globals.hpp Sat Mar 13 16:32:49 2010 -0800
@@ -2289,6 +2289,10 @@
"print safepoint statistics only when safepoint takes" \
" more than PrintSafepointSatisticsTimeout in millis") \
\
+ product(bool, TraceSafepointCleanupTime, false, \
+ "print the break down of clean up tasks performed during" \
+ " safepoint") \
+ \
develop(bool, InlineAccessors, true, \
"inline accessor methods (get/set)") \
\
--- a/hotspot/src/share/vm/runtime/safepoint.cpp Fri Mar 12 10:42:16 2010 -0500
+++ b/hotspot/src/share/vm/runtime/safepoint.cpp Sat Mar 13 16:32:49 2010 -0800
@@ -457,21 +457,21 @@
// Various cleaning tasks that should be done periodically at safepoints
void SafepointSynchronize::do_cleanup_tasks() {
{
- TraceTime t1("deflating idle monitors", TraceSafepoint);
+ TraceTime t1("deflating idle monitors", TraceSafepointCleanupTime);
ObjectSynchronizer::deflate_idle_monitors();
}
{
- TraceTime t2("updating inline caches", TraceSafepoint);
+ TraceTime t2("updating inline caches", TraceSafepointCleanupTime);
InlineCacheBuffer::update_inline_caches();
}
if(UseCounterDecay && CounterDecay::is_decay_needed()) {
- TraceTime t3("decaying counter", TraceSafepoint);
+ TraceTime t3("decaying counter", TraceSafepointCleanupTime);
CounterDecay::decay();
}
- TraceTime t4("sweeping nmethods", TraceSafepoint);
+ TraceTime t4("sweeping nmethods", TraceSafepointCleanupTime);
NMethodSweeper::sweep();
}