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6950075: nmethod sweeper should operate concurrently

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Reviewed-by: never, kvn
This commit is contained in:
Eric Caspole 2010-05-17 16:50:07 -07:00 • committed by Tom Rodriguez
parent 85854f0e13
commit 430574f398
9 changed files with 171 additions and 89 deletions
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24
hotspot/src/share/vm/code/codeCache.cpp
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@ -124,6 +124,23 @@ nmethod* CodeCache::alive_nmethod(CodeBlob* cb) {
return (nmethod*)cb;
}
nmethod* CodeCache::first_nmethod() {
assert_locked_or_safepoint(CodeCache_lock);
CodeBlob* cb = first();
while (cb != NULL && !cb->is_nmethod()) {
cb = next(cb);
}
return (nmethod*)cb;
}
nmethod* CodeCache::next_nmethod (CodeBlob* cb) {
assert_locked_or_safepoint(CodeCache_lock);
cb = next(cb);
while (cb != NULL && !cb->is_nmethod()) {
cb = next(cb);
}
return (nmethod*)cb;
}
CodeBlob* CodeCache::allocate(int size) {
// Do not seize the CodeCache lock here--if the caller has not
@ -414,7 +431,7 @@ nmethod* CodeCache::find_and_remove_saved_code(methodOop m) {
saved->set_speculatively_disconnected(false);
saved->set_saved_nmethod_link(NULL);
if (PrintMethodFlushing) {
saved->print_on(tty, " ### nmethod is reconnected");
saved->print_on(tty, " ### nmethod is reconnected\n");
}
if (LogCompilation && (xtty != NULL)) {
ttyLocker ttyl;
@ -432,7 +449,8 @@ nmethod* CodeCache::find_and_remove_saved_code(methodOop m) {
}
void CodeCache::remove_saved_code(nmethod* nm) {
MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
// For conc swpr this will be called with CodeCache_lock taken by caller
assert_locked_or_safepoint(CodeCache_lock);
assert(nm->is_speculatively_disconnected(), "shouldn't call for other nmethods");
nmethod* saved = _saved_nmethods;
nmethod* prev = NULL;
@ -463,7 +481,7 @@ void CodeCache::speculatively_disconnect(nmethod* nm) {
nm->set_saved_nmethod_link(_saved_nmethods);
_saved_nmethods = nm;
if (PrintMethodFlushing) {
nm->print_on(tty, " ### nmethod is speculatively disconnected");
nm->print_on(tty, " ### nmethod is speculatively disconnected\n");
}
if (LogCompilation && (xtty != NULL)) {
ttyLocker ttyl;