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Why not using these counters?
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<div class=""><a href="https://github.com/named-data-ndnSIM/NFD/blob/NFD-0.6.5-ndnSIM/daemon/face/face-counters.hpp" class="">https://github.com/named-data-ndnSIM/NFD/blob/NFD-0.6.5-ndnSIM/daemon/face/face-counters.hpp</a></div>
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<div class="">Thanks,</div>
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<div>Spyridon (Spyros) Mastorakis<br class="">
Assistant Professor<br class="">
Computer Science Department<br class="">
University of Nebraska, Omaha<br class="">
Peter Kiewit Institute Room 175A<br class="">
<a href="https://sites.google.com/site/spyridonmastorakis" class="">https://sites.google.com/site/spyridonmastorakis</a><br class="">
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<div class="">On Feb 4, 2020, at 1:31 PM, Dyaneswaran S <<a href="mailto:dyaneswaran16028@cse.ssn.edu.in" class="">dyaneswaran16028@cse.ssn.edu.in</a>> wrote:</div>
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<div dir="ltr" class="">Hi guys,
<div class=""> My objective is to count the no of interest packets received in a node. Since this looked like the kind of namespace specific information that can be stored in the Measurements Table, I did the following as suggested in the NFD Developers
Guide and other strategies in the forwarder,</div>
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<div class="">1. Created a Nested Counter Class inside my Strategy class. It looks something like this - </div>
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<div class=""> class CounterInfo : public StrategyInfo</div>
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<div class=""> public:</div>
<div class=""> static constexpr int</div>
<div class=""> getTypeId()</div>
<div class=""> { return 1009; }</div>
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<div class=""> CounterInfo() : m_count(0)</div>
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<div class=""> }</div>
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<div class=""> void</div>
<div class=""> increment()</div>
<div class=""> { ++m_count;}</div>
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<div class=""> uint64_t</div>
<div class=""> get()</div>
<div class=""> { return m_count; }</div>
<div class=""> private:</div>
<div class=""> uint64_t m_count;</div>
<div class=""> };</div>
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<div class="">2. Then, in my AfterReceiveInterest() Trigger, I retrieve the entry using the piEntry APIs like this,</div>
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<div class=""> CounterInfo *counter = pitEntry->getStrategyInfo<CounterInfo>();</div>
<div class=""> if(pitEntry->getStrategyInfo<CounterInfo>() == nullptr)</div>
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<div class=""> counter = new CounterInfo();</div>
<div class=""> counter->increment();</div>
<div class=""> pitEntry->insertStrategyInfo<CounterInfo>(*counter);</div>
<div class=""> }</div>
<div class=""> else</div>
<div class=""> {</div>
<div class=""> counter->increment();</div>
<div class=""> }</div>
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<div class="">3. I thought the above 2 steps were sufficient, but apparently not. So after more digging, I found out I had to extend the Lifetime of Measurements Table Entries. I was not sure how Measurements and StrategyInfo Class were interrelated but I did
it anyway. (superstitious, I agree). That looked like - </div>
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<div class=""> this->getMeasurements().extendLifetime(*entry, MEASUREMENTS_LIFETIME);</div>
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<div class="">But even then, I didnt get the expected output. That is the counter variable is not counting the packets.</div>
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<div class="">Instead, its count never gets past 1. I am sure this is because its getting instantiated newly everytime this strategy is applied.</div>
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<div class="">Somehow, its not accessing the already stored strategy info. I thought it was because of the different pit entries causing new measurement entries (since measurements are accessed via pitentries). But I made sure that didnt happen as well.</div>
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<div class="">I thought about approximating the count of interest packets to the no. of PIT inrecords but that was ridiculous. I needed the actual count of interest packets. </div>
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<div class="">Any pointers?? Any of my assumptions wrong?</div>
<div class="">Am I doing it the hard/correct way? Any other methods?</div>
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