RFR: 8166002: Emulate client build on platforms with reduced virtual address space

[Jamsheed C m]

Hi Vladimir, Igor,

revised webrev: http://cr.openjdk.java.net/~jcm/8166002/webrev.02/

i took flags from bug comment.

Igor V. suggested next flags setting to emulate Client VM compile 
threshold with TieredStopAtLevel=1:

Tier3BackEdgeThreshold=14000
Tier3CompileThreshold=1500
Tier3InvocationThreshold=1500
Tier3MinInvocationThreshold =1500

Best Regards,

Jamsheed

On 10/28/2016 11:48 PM, Vladimir Kozlov wrote:
> Add comment what the code does and why. Move the code into separate 
> function reaturning bool. And condition CodeCache setting based on 
> result. It will reduce #ifdef mess.
>
> Can you put && to the end of previous line? To get good alignment.
> Should we also change CompilationPolicyChoice?
>
> Ask Igor Veresov to verify settings.
>
> Thanks,
> Vladimir
>
> On 10/28/16 10:59 AM, Jamsheed C m wrote:
>> Hi Vladimir,
>>
>> revised webrev with just ergo settings for win32.
>>
>> http://cr.openjdk.java.net/~jcm/8166002/webrev.01/
>>
>> Best Regards
>>
>> Jamsheed
>>
>>
>> On 10/28/2016 12:25 PM, Vladimir Kozlov wrote:
>>> Hi Jamsheed,
>>>
>>> Why you need changes in tests?
>>>
>>> Why you can't use set_client_compilation_mode() in both places?
>>>
>>> Looks fine otherwise.
>>>
>>> Thanks,
>>> Vladimir
>>>
>>> On 10/20/16 8:45 AM, Jamsheed C m wrote:
>>>> Hi All,
>>>>
>>>> bug id:https://bugs.openjdk.java.net/browse/JDK-8166002
>>>>
>>>> http://cr.openjdk.java.net/~jcm/8166002/webrev.00/
>>>>
>>>> Fix: set NeverActAsServerClassMachine=true, Limit TieredCompilation 
>>>> to C1 by default, for win32 platform.
>>>>
>>>> A new flag CompilationMode=<client/server> is introduced to select 
>>>> server/ client mode compilation. This option is supported only in 
>>>> TIERED builds.
>>>>
>>>> -XX:CompilationMode=server supports both -XX:+/-TieredCompilation.
>>>>
>>>> -XX:CompilationMode:client ignores TieredCompilation flag.
>>>>
>>>> Please review,
>>>>
>>>> Best Regards,
>>>>
>>>> Jamsheed
>>>>
>>>>
>>>>
>>