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Junxiao,
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<div class="">Thank you very much for the quick feedback.</div>
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<div class="">Ashlesh: have you found anything suspicious?<br class="">
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Lan</div>
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<div class="">On Oct 24, 2016, at 11:00 AM, Junxiao Shi <<a href="mailto:shijunxiao@email.arizona.edu" class="">shijunxiao@email.arizona.edu</a>> wrote:</div>
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<p dir="ltr" class="">Hi Ashlesh</p>
<p dir="ltr" class="">This is probably a forwarding pipelines bug, but I won't have time to diagnose this until at least Thursday.</p>
<p dir="ltr" class="">Things to look at:</p>
<p dir="ltr" class="">1. Find every code line that updates last renewed field.<br class="">
2. Find which forwarding pipelines calls the function that updates last renewed field.<br class="">
3. Determine if there's a code path that generates an out record without updating last renewed field.</p>
<p dir="ltr" class="">Yours, Junxiao</p>
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<div class="gmail_quote">On Oct 24, 2016 08:52, "Ashlesh Gawande (agawande)" <<a href="mailto:agawande@memphis.edu" class="">agawande@memphis.edu</a>> wrote:<br type="attribution" class="">
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<p class="">Hi Junxiao</p>
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<p class="">I am testing ASF in Mini-NDN.</p>
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<p class="">The following line calculates the steady RTT by subtracting outRecord-><span class="">getLastRenewed()</span></p>
<p class="">from <span class="">time::steady_clock::now()</span></p>
<p class=""><a href="https://github.com/named-data/NFD/blob/master/daemon/fw/asf-measurements.cpp#L117" class="m_-6286110043530299564OWAAutoLink" id="m_-6286110043530299564LPlnk470837" target="_blank">https://github.com/named-data/<wbr class="">NFD/blob/master/daemon/fw/asf-<wbr class="">measurements.cpp#L117</a><br class="">
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<p class="">(which is called from beforeSatisfyInterest <a href="https://github.com/named-data/NFD/blob/master/daemon/fw/asf-strategy.cpp#L115" class="m_-6286110043530299564OWAAutoLink" id="m_-6286110043530299564LPlnk412952" target="_blank">https://<wbr class="">github.com/named-data/NFD/<wbr class="">blob/master/daemon/fw/asf-<wbr class="">strategy.cpp#L115</a>)</p>
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<p class="">Sometimes the value of this steadyRTT is huge (ex: 200000 seconds) or negative.</p>
<p class="">This makes ASF change faces to a higher RTT face.</p>
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<p class="">So what could be the reason that this happening? I see much better and expected results if I ignore these high/negative values.</p>
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<p class="">(I see that <a href="https://github.com/named-data/NFD/blob/master/daemon/table/pit-face-record.cpp#L34" class="m_-6286110043530299564OWAAutoLink" id="m_-6286110043530299564LPlnk882460" target="_blank">https://github.com/named-<wbr class="">data/NFD/blob/master/daemon/<wbr class="">table/pit-face-record.cpp#L34</a></p>
<p class="">initializes getLastRenewed to <span class="">time::steady_clock::<wbr class="">TimePoint::min(). </span><span style="font-size:12pt" class="">So maybe for some reason getLastRenewed does not get updated?)</span></p>
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<p class=""><span style="font-size:12pt" class="">Thanks</span></p>
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<p class=""><span style="font-size:12pt" class="">Ashlesh</span></p>
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