Re: [rvm-research] Turning off synchronisation

[Khilan G. <kh...@do...>]

Hi,

I've been looking through the rvm command line flags here: http://www.jikesrvm.org/Running+the+RVM 
  and noticed the flag no_synchro for the optimising compiler.  
However, this flag doesn't seem to exist anymore or has it been moved  
somewhere else?

Thanks
--
Khilan Gudka
PhD Student
Department of Computing
Imperial College London
http://www.doc.ic.ac.uk/~khilan/

On 8 Sep 2009, at 21:06, Khilan Gudka wrote:

> Hi,
>
> Thanks for the advice. I'm using Soot.
>
> Khilan
>
> --
> Khilan Gudka
> PhD Student
> Department of Computing
> Imperial College London
> http://www.doc.ic.ac.uk/~khilan/
>
> On 8 Sep 2009, at 21:02, Steve Blackburn wrote:
>
>> Yes, asm is the popular choice these days.   Furthermore, it is one  
>> of
>> our build dependencies already (we use it for adding annotations).
>>
>> --Steve
>>
>> On 09/09/2009, at 3:44 AM, Filip Pizlo wrote:
>>
>>> I'm an ASM fan (http://asm.ow2.org/).  This would be quite trivial  
>>> in
>>> ASM.
>>>
>>> -Filip
>>>
>>>
>>>
>>> On Sep 8, 2009, at 13:39 , Emery Berger wrote:
>>>
>>>> Another possibility - which would allow you to use other JVMs,
>>>> should
>>>> you so desire, and would probably be easier than modifying the  
>>>> Jikes
>>>> compiler - would be to use bytecode rewriting. Which raises a good
>>>> question - what Java bytecode rewriters are people using these  
>>>> days?
>>>>
>>>> --
>>>> Emery Berger
>>>> Associate Professor
>>>> Dept. of Computer Science
>>>> University of Massachusetts
>>>> www.cs.umass.edu/~emery
>>>>
>>>>
>>>>
>>>> 2009/9/8 David P Grove <gr...@us...>:
>>>>> Khilan Gudka <kh...@do...> wrote on 09/08/2009 06:36:07  
>>>>> AM:
>>>>>>
>>>>>> Is there any easy way to turn synchronized into a no-op? I would
>>>>>> like
>>>>>> to do various (timing) comparisons like against a version with no
>>>>>> synchronisation.
>>>>>>
>>>>>
>>>>> Since Jikes RVM uses Java synchronization for its own
>>>>> implementation, I
>>>>> think it is fairly unlikely that no-oping all synchronization is
>>>>> likely to
>>>>> yield a working VM.
>>>>>
>>>>> Probably your best bet would be to try to modify the optimizing
>>>>> compiler to
>>>>> no-op monitorenter/exit bytecodes for selected application
>>>>> classes.  Won't
>>>>> be perfect, but maybe enough for you to see something.
>>>>>
>>>>> --dave
>>>>>
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