Request for review (S): 7022998: JSR 292 recursive method handle calls inline themselves infinitely
tom.rodriguez at oracle.com
Thu Mar 17 10:31:23 PDT 2011
On Mar 17, 2011, at 4:25 AM, Christian Thalinger wrote:
> On Mar 15, 2011, at 7:41 PM, Vladimir Kozlov wrote:
>> Christian Thalinger wrote:
>>> On Mar 15, 2011, at 5:57 PM, Vladimir Kozlov wrote:
>>>> Instead of duplicating code in several places could you factor it in one method?
>>> Actually I wanted to do that but I didn't know where to put the code. sharedRuntime?
>> May be a static method in CompileTask or AbstractCompiler since it is compilation information.
> CompileTask seems suitable. I put a couple of static methods in there and the code is much cleaner now. I updated the webrev.
>>>> sharedRuntime.cpp: you removed "---" which was indication of native method wrapper compilation.
>>> Is there a difference between the "n" printed in nmethod::print_compilation and the "n" printed in AdapterHandlerLibrary::create_native_wrapper?
>> I never saw nmethod::print_compilation using 'n' in output. But I assume it is the same.
> So I'd say we just drop the "---" and use "n" as the indicator for a native method wrapper.
I'm not sure I understand this conversation. What --- are you dropping? n has always represented native wrappers.
> -- Christian
>>>> Main fix is fine.
>>> -- Christian
>>>> Christian Thalinger wrote:
>>>>> 7022998: JSR 292 recursive method handle calls inline themselves infinitely
>>>>> Methods doing recursive method handle calls, like in JRuby's
>>>>> bench_fib_resursive.rb or bench_tak.rb, inline themselves infinitely.
>>>>> This results in a huge method which hits compile thresholds and aborts
>>>>> inlining resulting in poor performance.
>>>>> The inlining logic needs to know about method handle call sites and
>>>>> search the call stack for recursive calls.
>>>>> This change also cleans up the PrintCompilation, PrintInlining and
>>>>> TraceTypeProfile output to be aligned since the tiered compilation
>>>>> changes added some additional output.
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