RFR (S): 8232776: G1 should always take rs_length_diff into account when predicting rs_lengths

[Thomas Schatzl]

Hi Kim, Sangheon,

On 22.10.19 22:49, sangheon.kim at oracle.com wrote:
> Hi Thomas,
> 
> On 10/22/19 10:35 AM, Thomas Schatzl wrote:
>> Hi all,
>>
>>   can I have reviews for this small change that makes G1 always use 
>> the error term for rs-length prediction, not only if G1 sees fit.
>>
>> While rs length prediction is still kind of bad even with this change 
>> (and seemingly a band-aid), with that change it is a bit better. While 
>> there is a "real" fix for RS length estimation coming that so far 
>> looks really good, this change decreases complexity of further changes 
>> in G1Policy enough while improving the estimation.
>>
>> CR:
>> https://bugs.openjdk.java.net/browse/JDK-8232776
>> Webrev:
>> http://cr.openjdk.java.net/~tschatzl/8232776/webrev/
> Looks good.
> 

   thanks for your review.

Thomas