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Date: Fri, 24 Nov 2006 08:18:03 -0800 (PST)
From: =?utf-8?Q?Holger_Hoffst=C3=A4tte_=28JIRA=29?= <jira@apache.org>
To: commons-dev@jakarta.apache.org
Subject: [jira] Commented: (POOL-93) Reduce contention by making borrow &
 return more independent from each other
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    [ http://issues.apache.org/jira/browse/POOL-93?page=3Dcomments#action_1=
2452492 ]=20
           =20
Holger Hoffst=C3=A4tte commented on POOL-93:
---------------------------------------

One more note on the benchmarks: all this was done on a single-core P4 2.4G=
Hz. Experiments on a dual-core Opteron show that even with JDK6 not more th=
an 120% CPU load was attained because of the overall contention, most likel=
y borrowObject().
My guess is that more expensive validate/return factory methods will give m=
ore concrete results of increased throughput.


> Reduce contention by making borrow & return more independent from each ot=
her
> -------------------------------------------------------------------------=
---
>
>                 Key: POOL-93
>                 URL: http://issues.apache.org/jira/browse/POOL-93
>             Project: Commons Pool
>          Issue Type: Improvement
>    Affects Versions: Nightly Builds
>            Reporter: Holger Hoffst=C3=A4tte
>         Attachments: GKOP-relaxedSyncOnReturn.patch, relaxedReturnObjectB=
enchmark.txt
>
>
> Currently borrow & return are completely blocked from each other, while a=
t least the factory-based validation & destruction can be handled independe=
ntly. A few simple changes narrow the synchronization blocks yet retain ove=
rall correctness.

--=20
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