RFR: 8252093: formula used to calculate decaying variance in numberSeq

stefan.johansson at oracle.com stefan.johansson at oracle.com
Fri Aug 28 07:32:46 UTC 2020



On 2020-08-27 20:41, Albert Yang wrote:
>  > Have you run any benchmarks and compared scores as well as GC-behavior?
> 
> Checking SPECjbb2015 now. What kind of GC behavior do you have in mind?
> 
Something like running jbb2015 and other benchmarks without any options 
(maybe just max heap), and looking at if there is any change in for 
example heap/generation sizing or when we start concurrent cycles.

It's probably also good to look at the logs for a tuned run and see that 
things looks the same there, but when tuning the heuristics don't get as 
much room.

>  > Is there a good reason for keeping it inverted
> 
> The only thing I can think of is to avoid invasive change. I am more 
> leaned towards changing it to be consistent with the literature.
> 

I agree with you, I guess it can be done as a follow up.

Thanks,
Stefan


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