RFR: JDK-8142475: Remove TraceParallelOldGCTasks

[David Lindholm]

Hi Bengt,

Changes looks good. Reviewed.

/David

On 2015-11-11 13:46, Bengt Rutisson wrote:
>
> Hi all,
>
> Could I have a couple of reviews for this change?
>
> https://bugs.openjdk.java.net/browse/JDK-8142475
> http://cr.openjdk.java.net/~brutisso/8142475/webrev.00/
>
> The ParallelGC has logging in debug builds (even if it is guarded by a 
> product flag) that logs messages for each task.
>
> The output from this logging i pretty scrambled and hard to make sense 
> of. Each thread prints the task it is currently working on. There is 
> no correlation between threads and there is no summary to add times 
> for related tasks.
>
> This type of per thread information is hard to make useful in a log 
> file. It would be much better to add trace events for this information.
>
> Rather than trying to fix this logging we should remove it. If it 
> turns out that it is needed in the future we should add trace events 
> to track it.
>
> Thanks,
> Bengt