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8032463: VirtualDispatch test timeout with DeoptimizeALot

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Introduce code aging for warm method detection

Reviewed-by: kvn, twisti
This commit is contained in:
Igor Veresov 2014-05-13 11:32:10 -07:00
parent 5938d3d5b9
commit 54db2c2d61
27 changed files with 283 additions and 69 deletions
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26
hotspot/src/share/vm/c1/c1_LIRGenerator.cpp
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@ -2782,7 +2782,10 @@ void LIRGenerator::do_Base(Base* x) {
__ lock_object(syncTempOpr(), obj, lock, new_register(T_OBJECT), slow_path, NULL);
}
}
if (compilation()->age_code()) {
CodeEmitInfo* info = new CodeEmitInfo(scope()->start()->state()->copy(ValueStack::StateBefore, 0), NULL, false);
decrement_age(info);
}
// increment invocation counters if needed
if (!method()->is_accessor()) { // Accessors do not have MDOs, so no counting.
profile_parameters(x);
@ -3328,6 +3331,27 @@ void LIRGenerator::increment_event_counter(CodeEmitInfo* info, int bci, bool bac
increment_event_counter_impl(info, info->scope()->method(), (1 << freq_log) - 1, bci, backedge, true);
}
void LIRGenerator::decrement_age(CodeEmitInfo* info) {
ciMethod* method = info->scope()->method();
MethodCounters* mc_adr = method->ensure_method_counters();
if (mc_adr != NULL) {
LIR_Opr mc = new_pointer_register();
__ move(LIR_OprFact::intptrConst(mc_adr), mc);
int offset = in_bytes(MethodCounters::nmethod_age_offset());
LIR_Address* counter = new LIR_Address(mc, offset, T_INT);
LIR_Opr result = new_register(T_INT);
__ load(counter, result);
__ sub(result, LIR_OprFact::intConst(1), result);
__ store(result, counter);
// DeoptimizeStub will reexecute from the current state in code info.
CodeStub* deopt = new DeoptimizeStub(info, Deoptimization::Reason_tenured,
Deoptimization::Action_make_not_entrant);
__ cmp(lir_cond_lessEqual, result, LIR_OprFact::intConst(0));
__ branch(lir_cond_lessEqual, T_INT, deopt);
}
}
void LIRGenerator::increment_event_counter_impl(CodeEmitInfo* info,
ciMethod *method, int frequency,
int bci, bool backedge, bool notify) {