Thanks for your reply
I've done nothing particular, I've just 2 instances of LLRPConnector and
from the messageReceived of each instance I forward the info to a single
function that adds the current tag to a list if it's not already present in
that list.
I've not this kind of problem when using 2 old Impinj-speedway readers and
my own java implementation of the MACH protocol.
Fabio
2010/11/24 floerkem <[email protected]>
>
> 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
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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
>
>
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> experiences on the web. Be a part of the beta today
>
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*Fabio Bondioli*
Autentieweb s.r.l. - http://www.autentiweb.com
via dei Marmorari 84 - 41057 - Spilamberto (MO) - ITALY
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