RFR (XS): 8238229: Remove TRACESPINNING debug code

[Thomas Schatzl]

Hi,

On 30.01.20 16:24, Stefan Johansson wrote:
> Looks good,
> StefanJ

   all fixed. Idk why these were missing in that webrev, I regenerated it.

Thanks,
   Thomas

> 
> On 2020-01-30 12:56, Thomas Schatzl wrote:
>> Hi all,
>>
>>    can I have reviews for this removal of some debug code in the 
>> TaskTerminator class?
>>
>> The code counts the total number of yields/peeks/spins during task 
>> termination. Since it is guarded by a define, the code is not included 
>> in any regular build, so there is potential for bit-rotting.
>>
>> Since the code is not very complicated (and I believe it is too simple 
>> for real measurements), and needs rebuild anyway for use I propose to 
>> just remove it instead of trying to improve it for unknown requirements.
>>
>> Based on JDK-8238220.
>>
>> CR:
>> https://bugs.openjdk.java.net/browse/JDK-8238229
>> Webrev:
>> http://cr.openjdk.java.net/~tschatzl/8238229/webrev/
> 
> I agree that this can be removed, and there is even more code that 
> should go. The call from each collected heap:
> src/hotspot/share/gc/shared/genCollectedHeap.cpp:680:#ifdef TRACESPINNING
> src/hotspot/share/gc/parallel/psParallelCompact.cpp:1972:#ifdef 
> TRACESPINNING
> src/hotspot/share/gc/parallel/psScavenge.cpp:734:#ifdef TRACESPINNING
> src/hotspot/share/gc/g1/g1CollectedHeap.cpp:1135:#ifdef TRACESPINNING
> src/hotspot/share/gc/g1/g1CollectedHeap.cpp:3143:#ifdef TRACESPINNING
> 
> Otherwise, looks good,
> StefanJ
> 
>> Testing:
>> local compilation
>>
>> Thanks,
>>    Thomas