Bug in G1 logging?

Thomas Viessmann thomas.viessmann at oracle.com
Mon Jun 15 09:08:42 UTC 2015


Hi Mikael,

OK. Nevertheless it's confusing if the vast amount of [Other] does not show
up in its sub-categories. How about adding another [Other] in there? :-D

Thanks and Regards

Thomas

On 15/06/2015 10:52, Mikael Gerdin wrote:
> Hi Thomas,
>
> On 2015-06-15 10:41, Thomas Viessmann wrote:
>> Hi all,
>>
>> There is probably a bug in G1 logging in 8u40. The total of [Other:
>> 214.0 ms]
>> does not match the sum  of its sub-categories which amount to just 
>> 9.2 ms.
>> Hence at least one of these is supposedly wrong. Is this a known bug or
>> should I file
>> a new one?
>
> This is not a bug, there may be unmeasured phases during the GC which 
> can take unexpected amounts of time.
>
> /Mikael
>
>>
>>    [Code Root Fixup: 0.1 ms]
>>     [Code Root Purge: 0.0 ms]
>>     [Clear CT: 2.0 ms]
>>     [Other: 214.0 ms]<<<<<<<<<<<<<<<<<<
>>        [Choose CSet: 0.0 ms]
>>        [Ref Proc: 4.9 ms]
>>        [Ref Enq: 0.3 ms]
>>        [Redirty Cards: 2.1 ms]
>>           [Parallel Redirty:  1.8  1.8  1.7  1.7  1.7  1.7 1.7 1.7 1.7
>> 1.7  1.6  1.6  1.6
>>            Min: 1.6, Avg: 1.7, Max: 1.8, Diff: 0.2, Sum: 22.1]
>>           [Redirtied Cards:  27319  24512  23040  24635 18996 28913
>> 20628  19163  17881  17664  15360  18417  16639
>>            Min: 15360, Avg: 21012.8, Max: 28913, Diff: 13553, Sum: 
>> 273167]
>>        [Humongous Reclaim: 0.0 ms]
>>           [Humongous Total: 11]
>>           [Humongous Candidate: 0]
>>           [Humongous Reclaimed: 0]
>>        [Free CSet: 1.9 ms]
>>           [Young Free CSet: 1.9 ms]
>>           [Non-Young Free CSet: 0.0 ms]
>>     [Eden: 3400.0M(3232.0M)->0.0B(848.0M) Survivors: 176.0M->376.0M
>> Heap: 12.6G(24.0G)->9673.3M(24.0G)]
>>
>>
>>
>> Thanks and Regards
>>
>> Thomas
>>

-- 
Oracle <http://www.oracle.com>
THOMAS VIESSMANN | Senior Principal Technical Support Engineer - Java
Phone: +498914302496 <tel:+49814302496> | Mobile: +491743005467 
<tel:+491743005467>
Oracle Customer Technical Support - Java

ORACLE Deutschland B.V. & Co. KG | Riesstr.25 | D-80992 Muenchen

ORACLE Deutschland B.V. & Co. KG
Hauptverwaltung: Riesstr. 25, D-80992 Muenchen
Registergericht: Amtsgericht Muenchen, HRA 95603

Komplementärin: ORACLE Deutschland Verwaltung B.V.
Hertogswetering 163/167, 3543 AS Utrecht, Niederlande
Handelsregister der Handelskammer Midden-Niederlande, Nr. 30143697
Geschäftsführer: Alexander van der Ven, Astrid Kepper, Val Maher

------------------------------------------------------------------------
------------------------------------------------------------------------
Green Oracle <http://www.oracle.com/commitment> Oracle is committed to 
developing practices and products that help protect the environment
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mail.openjdk.java.net/pipermail/hotspot-gc-dev/attachments/20150615/d3cb2878/attachment.html>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: oracle_sig_logo.gif
Type: image/gif
Size: 658 bytes
Desc: not available
URL: <http://mail.openjdk.java.net/pipermail/hotspot-gc-dev/attachments/20150615/d3cb2878/oracle_sig_logo.gif>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: green-for-email-sig_0.gif
Type: image/gif
Size: 356 bytes
Desc: not available
URL: <http://mail.openjdk.java.net/pipermail/hotspot-gc-dev/attachments/20150615/d3cb2878/green-for-email-sig_0.gif>


More information about the hotspot-gc-dev mailing list