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6934758: Expose the break down of clean up task time during safepoint

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Use -XX:+TraceSafepointCleanupTime to print out the details of each clean up tasks.

Reviewed-by: dholmes, ysr
This commit is contained in:
Xiaobin Lu 2010-03-13 16:32:49 -08:00
parent 053d7adeb2
commit 09f8dd45d1
2 changed files with 8 additions and 4 deletions
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4
hotspot/src/share/vm/runtime/globals.hpp
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@ -2289,6 +2289,10 @@ class CommandLineFlags {
"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)") \
\

8
hotspot/src/share/vm/runtime/safepoint.cpp
View File

@ -457,21 +457,21 @@ void CounterDecay::decay() {
// 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();
}