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4360113: Evict nmethods when code cache gets full

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Speculatively unload the oldest nmethods when code cache gets full.

Reviewed-by: never, kvn
This commit is contained in:
Eric Caspole 2010-01-29 09:27:22 -08:00 • committed by Vladimir Kozlov
parent 9aa675b7e6
commit a57d68e35b
19 changed files with 452 additions and 76 deletions
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12
hotspot/src/share/vm/code/nmethod.cpp
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@ -587,6 +587,7 @@ nmethod::nmethod(
_osr_link = NULL;
_scavenge_root_link = NULL;
_scavenge_root_state = 0;
_saved_nmethod_link = NULL;
_compiler = NULL;
// We have no exception handler or deopt handler make the
// values something that will never match a pc like the nmethod vtable entry
@ -1033,7 +1034,7 @@ void nmethod::cleanup_inline_caches() {
if( cb != NULL && cb->is_nmethod() ) {
nmethod* nm = (nmethod*)cb;
// Clean inline caches pointing to both zombie and not_entrant methods
if (!nm->is_in_use()) ic->set_to_clean();
if (!nm->is_in_use() || (nm->method()->code() != nm)) ic->set_to_clean();
}
break;
}
@ -1043,7 +1044,7 @@ void nmethod::cleanup_inline_caches() {
if( cb != NULL && cb->is_nmethod() ) {
nmethod* nm = (nmethod*)cb;
// Clean inline caches pointing to both zombie and not_entrant methods
if (!nm->is_in_use()) csc->set_to_clean();
if (!nm->is_in_use() || (nm->method()->code() != nm)) csc->set_to_clean();
}
break;
}
@ -1312,7 +1313,8 @@ void nmethod::flush() {
// completely deallocate this method
EventMark m("flushing nmethod " INTPTR_FORMAT " %s", this, "");
if (PrintMethodFlushing) {
tty->print_cr("*flushing nmethod " INTPTR_FORMAT ". Live blobs: %d", this, CodeCache::nof_blobs());
tty->print_cr("*flushing nmethod %3d/" INTPTR_FORMAT ". Live blobs:" UINT32_FORMAT "/Free CodeCache:" SIZE_FORMAT "Kb",
_compile_id, this, CodeCache::nof_blobs(), CodeCache::unallocated_capacity()/1024);
}
// We need to deallocate any ExceptionCache data.
@ -1330,6 +1332,10 @@ void nmethod::flush() {
CodeCache::drop_scavenge_root_nmethod(this);
}
if (is_speculatively_disconnected()) {
CodeCache::remove_saved_code(this);
}
((CodeBlob*)(this))->flush();
CodeCache::free(this);