Request for reviews (XXS): 7003130: assert(iterations<CG_BUILD_ITER_LIMIT) failed: infinite EA connection graph

[Vladimir Kozlov]

Thank you, Igor

Vladimir

Igor Veresov wrote:
> Looks good.
> 
> igor
> 
> On 12/21/10 10:51 AM, Vladimir Kozlov wrote:
>> http://cr.openjdk.java.net/~kvn/7003130/webrev
>>
>> Fixed 7003130: assert(iterations<CG_BUILD_ITER_LIMIT) failed: infinite
>> EA connection graph
>>
>> It seems, 10 for CG_BUILD_ITER_LIMIT is small.
>> I rerun current VM with jvm2008 and observed 8 iterations.
>> So a case with 10 may be not as rare as I thought.
>> I tried to collect statistic on the correlation
>> of this number with total number of nodes and number
>> of particular idead nodes (addp,load,store,call) but
>> I did not find any correlation. It seems, it depends
>> more on the order of nodes on worklist than on number
>> of nodes.
>>
>> Bumping CG_BUILD_ITER_LIMIT to 20.
>>
>> Note: in product VM we recompile a method without EA
>> so it is not a critical problem.
>