RFR (M) 8213753: SymbolTable is double walked during class unloading and clean up table timing in do_unloading

[coleen.phillimore at oracle.com]

Thanks for the code review!
Coleen

On 1/31/19 10:03 AM, Aleksey Shipilev wrote:
> On 1/30/19 8:41 PM, coleen.phillimore at oracle.com wrote:
>> I added the timing for triggering cleanup.  It's likely not interesting.  The main cleanup time is
>> code cache cleaning still.
>>
>> This is my fastdebug timing:
>> [4.992s][debug][gc,phases] GC(2) ClassLoaderData 0.016ms
>> [4.992s][debug][gc,phases] GC(2) Trigger cleanups 0.010ms
>> [5.039s][debug][gc,phases] GC(2) Class Unloading 47.290ms
>>
>> open webrev at http://cr.openjdk.java.net/~coleenp/2019/8213753.02/webrev
> Looks good.
>
> -Aleksey
>