RFR: JDK-8142475: Remove TraceParallelOldGCTasks

Bengt Rutisson bengt.rutisson at oracle.com
Thu Nov 12 08:23:00 UTC 2015

On 2015-11-12 09:24, David Lindholm wrote:
> Hi Bengt,
> Changes looks good. Reviewed.

Thanks, David!


> /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

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