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From Romain Manni-Bucau <rmannibu...@gmail.com>
Subject Re: [math] Multithreaded performances
Date Mon, 04 Nov 2013 20:12:16 GMT
But aggregation needs to lock so not a real solution. Lock is fine on real
cases but not in simple/light ones. ThreadLocal leaks...so a trade off
should be found
Le 4 nov. 2013 18:42, "Phil Steitz" <phil.steitz@gmail.com> a écrit :

> On 11/4/13 8:49 AM, Romain Manni-Bucau wrote:
> > Hi,
> >
> > ATM sirona (a java monitoring library in incubator) relies a lot on
> > Summary stats object from [math3] but it needed a lock to ensure
> > consistency. I know there is a synchronized version but this one
> > scales less then the locked one.
> >
> > My question is quite simple then: will [math] add an implementation
> > with thread safety guarantee and good performances? I think for
> > instance to the LongAdder of Doug Lea which could be used as a good
> > base.
>
> The short answer is yes, patches welcome.
>
> Ted makes a good point, though; and there is already some support
> for aggregation in the stats classes in [math] (i.e., you can
> aggregate the results of per-thread stats by using, e.g.
> AggregateSummaryStatistics#aggregate).  See MATH-1016 re extending
> this to more stats.
>
> Phil
>
> >
> > Romain Manni-Bucau
> > Twitter: @rmannibucau
> > Blog: http://rmannibucau.wordpress.com/
> > LinkedIn: http://fr.linkedin.com/in/rmannibucau
> > Github: https://github.com/rmannibucau
> >
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>
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