Hi Fabio,
Apache MINA is actually a pretty scalable networking framework and I doubt this
is the cause (unless we made a mistake when we integrated it). There are a
whole range of other causes though such as reader interference or a potential
bottleneck while parsing the incoming messages.
You might want to see whether the arrival rate of RO_ACCESS_REPORT messages per
time at the LTK-JAVA impl changed for the one and two-reader setup. What is
your approach to avoid reader interference for your two-reader setup?
Christian
On Nov 22, 2010, at 2:47 AM, Fabio Bondioli wrote:
> Hi Christian,
>
> I'm using the MINA based networking capability of LTK-Java. Actually I've
> noticed the problem trying to read about 250 tags in a 40x40x20 cm box at
> once.
>
> With few tags the problem isn't noticeable, thus is a bit difficult to test
> this behaviour using the fosstrak commander: with one reader I can read all
> the tags in about 2-3 seconds. With 2 readers it takes about 7-10 seconds.
>
> I don't think I've some bottleneck on my code because I just start a rospec
> on each reader and wait for messages from the ltk library.
> I will try to investigate on it more.
> Do you have any hint on how to use my own socket implementation?
>
> Regards
>
> Fabio
>
>
>
> 2010/11/21 floerkem <[email protected]>
>
> Fabio,
>
> we have been using LTK-Java in the Fosstrak LLRP Commander and did not notice
> significant performance issues with multiple readers, but this does not mean
> that they do not exist.
>
> Are you using the Apache MINA based networking capability of LTK-Java or your
> own socket implementation? You might want to try connecting to the readers
> with the Fosstrak LLRP commander and see whether you notice the same problem.
>
> - Christian
>
>
> On Nov 19, 2010, at 5:11 AM, Fabio Bondioli wrote:
>
>> Hi all,
>>
>> I need for the first time to use multiple readers at once. If I connect and
>> activate more than one reader at once using llrp-java, I can see that I
>> receive the read tags events at 25-50% the speed I usually have when using
>> only one instance.
>>
>> Is this a problem of the ltk-java library? Do anyone has experienced this
>> problem with the java implementation?
>>
>> Regards
>> Fabio
>>
>>
>> --
>> Fabio Bondioli
>> Autentieweb s.r.l. - http://www.autentiweb.com
>> via dei Marmorari 84 - 41057 - Spilamberto (MO) - ITALY
>> TEL: +39 059 7862702
>> FAX: +39 059 784615
>>
>>
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>
>
> ------------------------------------------------------------------------------
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>
> --
> Fabio Bondioli
> Autentieweb s.r.l. - http://www.autentiweb.com
> via dei Marmorari 84 - 41057 - Spilamberto (MO) - ITALY
> TEL: +39 059 7862702
> FAX: +39 059 784615
>
>
> ------------------------------------------------------------------------------
> Beautiful is writing same markup. Internet Explorer 9 supports
> standards for HTML5, CSS3, SVG 1.1, ECMAScript5, and DOM L2 & L3.
> Spend less time writing and rewriting code and more time creating great
> experiences on the web. Be a part of the beta today
> http://p.sf.net/sfu/msIE9-sfdev2dev_______________________________________________
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