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6614597: Performance variability in jvm2008 xml.validation

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Fix incorrect marking of methods as not compilable.

Reviewed-by: never
This commit is contained in:
Vladimir Kozlov 2010-02-01 16:49:49 -08:00
parent 4e8608a124
commit 0c27c5537e
18 changed files with 213 additions and 133 deletions
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20
hotspot/src/share/vm/opto/doCall.cpp
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@ -182,26 +182,16 @@ CallGenerator* Compile::call_generator(ciMethod* call_method, int vtable_index,
}
}
CallGenerator* miss_cg;
Deoptimization::DeoptReason reason = (profile.morphism() == 2) ?
Deoptimization::Reason_bimorphic :
Deoptimization::Reason_class_check;
if (( profile.morphism() == 1 ||
(profile.morphism() == 2 && next_hit_cg != NULL) ) &&
!too_many_traps(Deoptimization::Reason_class_check)
// Check only total number of traps per method to allow
// the transition from monomorphic to bimorphic case between
// compilations without falling into virtual call.
// A monomorphic case may have the class_check trap flag is set
// due to the time gap between the uncommon trap processing
// when flags are set in MDO and the call site bytecode execution
// in Interpreter when MDO counters are updated.
// There was also class_check trap in monomorphic case due to
// the bug 6225440.
!too_many_traps(jvms->method(), jvms->bci(), reason)
) {
// Generate uncommon trap for class check failure path
// in case of monomorphic or bimorphic virtual call site.
miss_cg = CallGenerator::for_uncommon_trap(call_method,
Deoptimization::Reason_class_check,
miss_cg = CallGenerator::for_uncommon_trap(call_method, reason,
Deoptimization::Action_maybe_recompile);
} else {
// Generate virtual call for class check failure path