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8010862: The Method counter fields used for profiling can be allocated lazily

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Allocate the method's profiling related metadata until they are needed.

Reviewed-by: coleenp, roland
This commit is contained in:
Jiangli Zhou 2013-04-09 17:17:41 -04:00
parent 0afa77628c
commit 56370657b9
34 changed files with 773 additions and 295 deletions
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13
hotspot/src/share/vm/runtime/advancedThresholdPolicy.cpp
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@ -1,5 +1,5 @@
/*
* Copyright (c) 2010, 2012, Oracle and/or its affiliates. All rights reserved.
* Copyright (c) 2010, 2013, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
@ -74,10 +74,11 @@ void AdvancedThresholdPolicy::initialize() {
// update_rate() is called from select_task() while holding a compile queue lock.
void AdvancedThresholdPolicy::update_rate(jlong t, Method* m) {
JavaThread* THREAD = JavaThread::current();
if (is_old(m)) {
// We don't remove old methods from the queue,
// so we can just zero the rate.
m->set_rate(0);
m->set_rate(0, THREAD);
return;
}
@ -93,13 +94,13 @@ void AdvancedThresholdPolicy::update_rate(jlong t, Method* m) {
if (delta_s >= TieredRateUpdateMinTime) {
// And we must've taken the previous point at least 1ms before.
if (delta_t >= TieredRateUpdateMinTime && delta_e > 0) {
m->set_prev_time(t);
m->set_prev_event_count(event_count);
m->set_rate((float)delta_e / (float)delta_t); // Rate is events per millisecond
m->set_prev_time(t, THREAD);
m->set_prev_event_count(event_count, THREAD);
m->set_rate((float)delta_e / (float)delta_t, THREAD); // Rate is events per millisecond
} else
if (delta_t > TieredRateUpdateMaxTime && delta_e == 0) {
// If nothing happened for 25ms, zero the rate. Don't modify prev values.
m->set_rate(0);
m->set_rate(0, THREAD);
}
}
}