RFR: 8289436: Make the redefine timer statistics more accurate

[Serguei Spitsyn]

On Wed, 29 Jun 2022 08:30:12 GMT, Tongbao Zhang <duke at openjdk.org> wrote:

> Make the redefine timer statistics more accurate
> 
> After some significant performance improvements of the class redefinition, like: 
> https://bugs.openjdk.org/browse/JDK-8139551
> https://bugs.openjdk.org/browse/JDK-8078725
> 
> Some time-consumption operation were moved out the "redefine_single_class"
> So the time added by  phase 1 and phase 2 cannot be accurately represented to the time of "vmop_doit"

This looks good.
Thanks,
Serguei

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Marked as reviewed by sspitsyn (Reviewer).

PR: https://git.openjdk.org/jdk/pull/9322