RFR: JDK-8148733: G1: Add log message to print the heap region size

[Bengt Rutisson]

On 2016-02-02 11:37, David Lindholm wrote:
> Hi Bengt,
>
> Your change looks good. Reviewed.

Thanks, David!

Bengt

>
>
> Thanks,
> David
>
> On 2016-02-01 10:50, Bengt Rutisson wrote:
>>
>> Hi everyone,
>>
>> Could I have a couple of reviews for this small change to add a log 
>> message to print the heap region size?
>>
>> http://cr.openjdk.java.net/~brutisso/8148733/webrev.00/
>> https://bugs.openjdk.java.net/browse/JDK-8148733
>>
>> Currently the heap region size is not explicitly visible in the GC 
>> log files. Since G1 calculates the region size at startup and then 
>> sticks with that size, it is enough to log the region size once 
>> during initialization.
>>
>> The new log message looks like this:
>>
>> [0.013s][info   ][gc,heap] Heap region size: 1M
>>
>> The test test/gc/logging/TestDeprecatedPrintFlags.java had to be 
>> updated to handle the padding in the logging of the tags. Before I 
>> added this message there was logging where the tags looked like this 
>> "[gc]", but since the new logging appears early in the log file these 
>> log message now look like "[gc     ]".
>>
>> Thanks,
>> Bengt
>>
>>
>