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<div><font face="Calibri,sans-serif">Junxiao,</font></div>
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</font></div>
<div><font face="Calibri,sans-serif">The application is intended to work over the current internet with low risk of IP fragmentation, so we are designing the packet sizes for MTUs of 1500 octets. </font></div>
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</font></div>
<div><font face="Calibri,sans-serif">Peter, can you run NTP in a peer-to-peer configuration to lower the clock offset between the vious machines and make it easier to troubleshoot just based on the logging? I can give you a configuration tomorrow. </font></div>
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<div><font face="Calibri,sans-serif">Junxiao, in addition to tcpdump, is there anything that logs at a lower layer in NFD which we could use to see when interest/data bits first come in over the wire? </font></div>
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</font></div>
<div><font face="Calibri,sans-serif">We will bring the whole setup to the ndn retreat... </font></div>
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<div><font face="Calibri,sans-serif">Jeff</font></div>
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<span style="font-weight:bold">From: </span>Junxiao Shi <<a href="mailto:shijunxiao@email.arizona.edu">shijunxiao@email.arizona.edu</a>><br>
<span style="font-weight:bold">Date: </span>Tue, 3 Feb 2015 22:50:35 -0700<br>
<span style="font-weight:bold">To: </span>"Gusev, Peter" <<a href="mailto:peter@remap.ucla.edu">peter@remap.ucla.edu</a>><br>
<span style="font-weight:bold">Cc: </span>Jeff Burke <<a href="mailto:jburke@remap.ucla.edu">jburke@remap.ucla.edu</a>>, "<a href="mailto:nfd-dev@lists.cs.ucla.edu">nfd-dev@lists.cs.ucla.edu</a>" <<a href="mailto:nfd-dev@lists.cs.ucla.edu">nfd-dev@lists.cs.ucla.edu</a>><br>
<span style="font-weight:bold">Subject: </span>Re: [Nfd-dev] NDN-RTC: NFD processing logs<br>
</div>
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</div>
<blockquote id="MAC_OUTLOOK_ATTRIBUTION_BLOCKQUOTE" style="BORDER-LEFT: #b5c4df 5 solid; PADDING:0 0 0 5; MARGIN:0 0 0 5;">
<div dir="ltr">Hi Peter
<div><br>
</div>
<div>I forgot to ask earlier: what's the MTU of the NICs?</div>
<div>Make sure the MTU is 9000 octets or higher, otherwise IP fragmentation will severely affect performance.</div>
<div><br>
</div>
<div><br>
</div>
<div>Congestion is unlikely to happen with 200Kbps traffic on 1000Mbps link.</div>
<div>CPU is also unlikely to be a bottleneck for 60 Interests/s.</div>
<div><br>
</div>
<div>Use `tcpdump` to see exactly when the packet is transmitted onto the network, in order to determine whether the delay is happening on sender host or receiver host.</div>
<div>Running `tcpdump` on the host itself will affect its performance. If an impact is evident, you could setup port mirroring on the switch, and run `tcpdump` on another machine that is connected to the mirrored port.</div>
<div><br>
</div>
<div>Yours, Junxiao<br>
<div class="gmail_extra"><br>
<div class="gmail_quote">On Tue, Feb 3, 2015 at 12:56 PM, Gusev, Peter <span dir="ltr">
<<a href="mailto:peter@remap.ucla.edu" target="_blank">peter@remap.ucla.edu</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div style="word-wrap:break-word">
<div>Hi Junxiao, </div>
<div><br>
</div>
<div>I run tests with all three (consumer, producer and hub) connected to the same 1Gbit switch. For the app configuration I tested - bitrate is ~150-200kbit/s, interest rate is about 50-60. </div>
<div><br>
</div>
<div>
<div>And discovered these cases:</div>
<div><br>
</div>
<div><u>Case #1</u></div>
<div><br>
</div>
<div><b>NFD1 (consumer):</b></div>
<div>
<div>1422920300.410412<span style="white-space:pre-wrap"></span>DEBUG: [Forwarder] onIncomingInterest face=261 interest=/ndn/edu/ucla/remap/ndnrtc/user/remap/streams/top_cam/low/delta/13851/data/%00%00</div>
<div>1422920300.410804 DEBUG: [Forwarder] onOutgoingInterest face=259 interest=/ndn/edu/ucla/remap/ndnrtc/user/remap/streams/top_cam/low/delta/13851/data/%00%00</div>
<div>1422920300.411138 DEBUG: [BestRouteStrategy2] /ndn/edu/ucla/remap/ndnrtc/user/remap/streams/top_cam/low/delta/13851/data/%00%00?ndn.MustBeFresh=1&ndn.InterestLifetime=5000&ndn.Nonce=<b><a href="tel:2128078661" value="+12128078661" target="_blank">2128078661</a></b> from=261
newPitEntry-to=259</div>
<div><span style="white-space:pre-wrap"></span>^ 0 sec, <b>440 msec </b><i>// retransmission</i></div>
<div>1422920300.851526 DEBUG: [Forwarder] onIncomingInterest face=261 interest=/ndn/edu/ucla/remap/ndnrtc/user/remap/streams/top_cam/low/delta/13851/data/%00%00</div>
<div>1422920300.851843 DEBUG: [Forwarder] onOutgoingInterest face=259 interest=/ndn/edu/ucla/remap/ndnrtc/user/remap/streams/top_cam/low/delta/13851/data/%00%00</div>
<div>1422920300.852127 DEBUG: [BestRouteStrategy2] /ndn/edu/ucla/remap/ndnrtc/user/remap/streams/top_cam/low/delta/13851/data/%00%00?ndn.MustBeFresh=1&ndn.InterestLifetime=5000&ndn.Nonce=<b>2749769734</b> from=261 retransmit-retry-to=259</div>
<div><span style="white-space:pre-wrap"></span>^ 0 sec, <b>302 msec </b>// data</div>
<div>1422920301.155108 DEBUG: [Forwarder] onIncomingData face=259 data=/ndn/edu/ucla/remap/ndnrtc/user/remap/streams/top_cam/low/delta/13851/data/%00%00/3/14365/513/0</div>
<div>1422920301.155452 DEBUG: [Forwarder] onIncomingData matching=/ndn/edu/ucla/remap/ndnrtc/user/remap/streams/top_cam/low/delta/13851/data/%00%00</div>
<div>1422920301.155680 DEBUG: [Strategy] beforeSatisfyPendingInterest pitEntry=/ndn/edu/ucla/remap/ndnrtc/user/remap/streams/top_cam/low/delta/13851/data/%00%00 inFace=259 data=/ndn/edu/ucla/remap/ndnrtc/user/remap/streams/top_cam/low/delta/13851/data/%00%00/3/14365/513/0</div>
<div>1422920301.156152 DEBUG: [Forwarder] onOutgoingData face=261 data=/ndn/edu/ucla/remap/ndnrtc/user/remap/streams/top_cam/low/delta/13851/data/%00%00/3/14365/513/0</div>
</div>
<div><br>
</div>
<div><b>NFD2 (hub):</b></div>
<div>
<div>1422920250.169018<span style="white-space:pre-wrap"></span>DEBUG: [Forwarder] onIncomingInterest face=266 interest=/ndn/edu/ucla/remap/ndnrtc/user/remap/streams/top_cam/low/delta/13851/data/%00%00</div>
<div>1422920250.169560 DEBUG: [Forwarder] onOutgoingInterest face=264 interest=/ndn/edu/ucla/remap/ndnrtc/user/remap/streams/top_cam/low/delta/13851/data/%00%00</div>
<div>1422920250.169959 DEBUG: [BestRouteStrategy2] /ndn/edu/ucla/remap/ndnrtc/user/remap/streams/top_cam/low/delta/13851/data/%00%00?ndn.MustBeFresh=1&ndn.InterestLifetime=5000&ndn.Nonce=<b><a href="tel:2128078661" value="+12128078661" target="_blank">2128078661</a></b> from=266
newPitEntry-to=264</div>
<div><span style="white-space:pre-wrap"></span>^ 0 sec, <b>736.911 msec </b>// retransmission</div>
<div>1422920250.906870 DEBUG: [Forwarder] onIncomingInterest face=266 interest=/ndn/edu/ucla/remap/ndnrtc/user/remap/streams/top_cam/low/delta/13851/data/%00%00</div>
<div>1422920250.907384 DEBUG: [Forwarder] onOutgoingInterest face=264 interest=/ndn/edu/ucla/remap/ndnrtc/user/remap/streams/top_cam/low/delta/13851/data/%00%00</div>
<div>1422920250.907801 DEBUG: [BestRouteStrategy2] /ndn/edu/ucla/remap/ndnrtc/user/remap/streams/top_cam/low/delta/13851/data/%00%00?ndn.MustBeFresh=1&ndn.InterestLifetime=5000&ndn.Nonce=<b>2749769734</b> from=266 retransmit-retry-to=264</div>
<div><span style="white-space:pre-wrap"></span>^ 0 sec, <b>2.541 msec </b><i>// data</i></div>
<div>1422920250.910342 DEBUG: [Forwarder] onIncomingData face=264 data=/ndn/edu/ucla/remap/ndnrtc/user/remap/streams/top_cam/low/delta/13851/data/%00%00/3/14365/513/0</div>
<div>1422920250.910812 DEBUG: [Forwarder] onIncomingData matching=/ndn/edu/ucla/remap/ndnrtc/user/remap/streams/top_cam/low/delta/13851/data/%00%00</div>
<div>1422920250.911125 DEBUG: [Strategy] beforeSatisfyPendingInterest pitEntry=/ndn/edu/ucla/remap/ndnrtc/user/remap/streams/top_cam/low/delta/13851/data/%00%00 inFace=264 data=/ndn/edu/ucla/remap/ndnrtc/user/remap/streams/top_cam/low/delta/13851/data/%00%00/3/14365/513/0</div>
<div>1422920250.911706 DEBUG: [Forwarder] onOutgoingData face=266 data=/ndn/edu/ucla/remap/ndnrtc/user/remap/streams/top_cam/low/delta/13851/data/%00%00/3/14365/513/0</div>
<div>1422920250.922749 DEBUG: [Forwarder] <b>onIncomingData</b> face=264 data=/ndn/edu/ucla/remap/ndnrtc/user/remap/streams/top_cam/low/delta/13851/data/%00%00/3/14365/513/0</div>
<div>1422920250.923068 DEBUG: [Forwarder] onIncomingData matching=/ndn/edu/ucla/remap/ndnrtc/user/remap/streams/top_cam/low/delta/13851/data/%00%00</div>
<div>1422920250.923315 DEBUG: [Strategy] beforeSatisfyPendingInterest pitEntry=/ndn/edu/ucla/remap/ndnrtc/user/remap/streams/top_cam/low/delta/13851/data/%00%00 inFace=264 data=/ndn/edu/ucla/remap/ndnrtc/user/remap/streams/top_cam/low/delta/13851/data/%00%00/3/14365/513/0</div>
<div style="font-weight:bold"><br>
</div>
</div>
<div style="font-weight:bold">NFD3 (producer):</div>
<div>
<div>1422920296.818710 DEBUG: [Forwarder] onIncomingInterest face=268 interest=/ndn/edu/ucla/remap/ndnrtc/user/remap/streams/top_cam/low/delta/13851/data/%00%00</div>
<div>1422920296.819102 DEBUG: [Forwarder] onOutgoingInterest face=265 interest=/ndn/edu/ucla/remap/ndnrtc/user/remap/streams/top_cam/low/delta/13851/data/%00%00</div>
<div>1422920296.819408 DEBUG: [BestRouteStrategy2] /ndn/edu/ucla/remap/ndnrtc/user/remap/streams/top_cam/low/delta/13851/data/%00%00?ndn.MustBeFresh=1&ndn.InterestLifetime=5000&ndn.Nonce=<b><a href="tel:2128078661" value="+12128078661" target="_blank">2128078661</a></b> from=268
newPitEntry-to=265</div>
<div><span style="white-space:pre-wrap"></span>^ 0 sec, <b>551.408 msec </b><i>// data</i></div>
<div>1422920297.370816 DEBUG: [Forwarder] onIncomingData face=265 data=/ndn/edu/ucla/remap/ndnrtc/user/remap/streams/top_cam/low/delta/13851/data/%00%00/3/14365/513/0</div>
<div>1422920297.371248 DEBUG: [Forwarder] onIncomingData matching=/ndn/edu/ucla/remap/ndnrtc/user/remap/streams/top_cam/low/delta/13851/data/%00%00</div>
<div>1422920297.371547 DEBUG: [Strategy] beforeSatisfyPendingInterest pitEntry=/ndn/edu/ucla/remap/ndnrtc/user/remap/streams/top_cam/low/delta/13851/data/%00%00 inFace=265 data=/ndn/edu/ucla/remap/ndnrtc/user/remap/streams/top_cam/low/delta/13851/data/%00%00/3/14365/513/0</div>
<div>1422920297.372106 DEBUG: [Forwarder] onOutgoingData face=268 data=/ndn/edu/ucla/remap/ndnrtc/user/remap/streams/top_cam/low/delta/13851/data/%00%00/3/14365/513/0</div>
<div><span style="white-space:pre-wrap"></span>^ 0 sec, 184.298 msec<span style="white-space:pre-wrap"></span><i>// retransmission</i></div>
<div>1422920297.556404 DEBUG: [Forwarder] onIncomingInterest face=268 interest=/ndn/edu/ucla/remap/ndnrtc/user/remap/streams/top_cam/low/delta/13851/data/%00%00</div>
<div>1422920297.557030 DEBUG: [Forwarder] onOutgoingData face=268 data=/ndn/edu/ucla/remap/ndnrtc/user/remap/streams/top_cam/low/delta/13851/data/%00%00/3/14365/513/0</div>
<div style="font-weight:bold"><br>
</div>
</div>
<div><u>Case #2</u></div>
<div><u><br>
</u></div>
<div><b>NFD1 (consumer):</b></div>
<div>
<div>1422919936.433502<span style="white-space:pre-wrap"></span>DEBUG: [Forwarder] onIncomingInterest face=261 interest=/ndn/edu/ucla/remap/ndnrtc/user/remap/streams/top_cam/low/delta/4102/data/%00%00</div>
<div>1422919936.434221 DEBUG: [BestRouteStrategy2] /ndn/edu/ucla/remap/ndnrtc/user/remap/streams/top_cam/low/delta/4102/data/%00%00?ndn.MustBeFresh=1&ndn.InterestLifetime=5000&ndn.Nonce=<a href="tel:3853552983" value="+13853552983" target="_blank">3853552983</a>
from=261 newPitEntry-to=259</div>
<div><span style="white-space:pre-wrap"></span>^ 0 sec, <b>402.119 msec</b></div>
<div>1422919936.836340 DEBUG: [Forwarder] onIncomingData face=259 data=/ndn/edu/ucla/remap/ndnrtc/user/remap/streams/top_cam/low/delta/4102/data/%00%00/1/4253/150/0</div>
<div>1422919936.836649 DEBUG: [Forwarder] onIncomingData matching=/ndn/edu/ucla/remap/ndnrtc/user/remap/streams/top_cam/low/delta/4102/data/%00%00</div>
<div>1422919936.836871 DEBUG: [Strategy] beforeSatisfyPendingInterest pitEntry=/ndn/edu/ucla/remap/ndnrtc/user/remap/streams/top_cam/low/delta/4102/data/%00%00 inFace=259 data=/ndn/edu/ucla/remap/ndnrtc/user/remap/streams/top_cam/low/delta/4102/data/%00%00/1/4253/150/0</div>
<div>1422919936.837279 DEBUG: [Forwarder] onOutgoingData face=261 data=/ndn/edu/ucla/remap/ndnrtc/user/remap/streams/top_cam/low/delta/4102/data/%00%00/1/4253/150/0</div>
</div>
<div><br>
</div>
<div><br>
</div>
<div><b>NFD2 (hub):</b></div>
<div>
<div>1422919886.178188<span style="white-space:pre-wrap"></span>DEBUG: [Forwarder] onIncomingInterest face=266 interest=/ndn/edu/ucla/remap/ndnrtc/user/remap/streams/top_cam/low/delta/4101/data/%00%00</div>
<div>1422919886.179368 DEBUG: [BestRouteStrategy2] /ndn/edu/ucla/remap/ndnrtc/user/remap/streams/top_cam/low/delta/4101/data/%00%00?ndn.MustBeFresh=1&ndn.InterestLifetime=5000&ndn.Nonce=3791853569 from=266 newPitEntry-to=264</div>
<div><span style="white-space:pre-wrap"></span>^ 0 sec, <b>89.772 msec</b></div>
<div>1422919886.269140 DEBUG: [Forwarder] onIncomingData face=264 data=/ndn/edu/ucla/remap/ndnrtc/user/remap/streams/top_cam/low/delta/4101/data/%00%00/1/4252/150/0</div>
<div>1422919886.269671 DEBUG: [Forwarder] onIncomingData matching=/ndn/edu/ucla/remap/ndnrtc/user/remap/streams/top_cam/low/delta/4101/data/%00%00</div>
<div>1422919886.270079 DEBUG: [Strategy] beforeSatisfyPendingInterest pitEntry=/ndn/edu/ucla/remap/ndnrtc/user/remap/streams/top_cam/low/delta/4101/data/%00%00 inFace=264 data=/ndn/edu/ucla/remap/ndnrtc/user/remap/streams/top_cam/low/delta/4101/data/%00%00/1/4252/150/0</div>
<div>1422919886.270718 DEBUG: [Forwarder] onOutgoingData face=266 data=/ndn/edu/ucla/remap/ndnrtc/user/remap/streams/top_cam/low/delta/4101/data/%00%00/1/4252/150/0</div>
</div>
<div><br>
</div>
<div><br>
</div>
<div><b>NFD3 (producer):</b></div>
<div>
<div>1422919932.865989<span style="white-space:pre-wrap"></span>DEBUG: [Forwarder] onIncomingInterest face=268 interest=/ndn/edu/ucla/remap/ndnrtc/user/remap/streams/top_cam/low/delta/4102/data/%00%00</div>
<div>1422919932.866855 DEBUG: [BestRouteStrategy2] /ndn/edu/ucla/remap/ndnrtc/user/remap/streams/top_cam/low/delta/4102/data/%00%00?ndn.MustBeFresh=1&ndn.InterestLifetime=5000&ndn.Nonce=<a href="tel:3853552983" value="+13853552983" target="_blank">3853552983</a>
from=268 newPitEntry-to=265</div>
<div><span style="white-space:pre-wrap"></span>^ 0 sec, <b>90.492 msec</b></div>
<div>1422919932.957347 DEBUG: [Forwarder] onIncomingData face=265 data=/ndn/edu/ucla/remap/ndnrtc/user/remap/streams/top_cam/low/delta/4102/data/%00%00/1/4253/150/0</div>
<div>1422919932.958010 DEBUG: [Forwarder] onIncomingData matching=/ndn/edu/ucla/remap/ndnrtc/user/remap/streams/top_cam/low/delta/4102/data/%00%00</div>
<div>1422919932.958342 DEBUG: [Strategy] beforeSatisfyPendingInterest pitEntry=/ndn/edu/ucla/remap/ndnrtc/user/remap/streams/top_cam/low/delta/4102/data/%00%00 inFace=265 data=/ndn/edu/ucla/remap/ndnrtc/user/remap/streams/top_cam/low/delta/4102/data/%00%00/1/4253/150/0</div>
<div>1422919932.958955 DEBUG: [Forwarder] onOutgoingData face=268 data=/ndn/edu/ucla/remap/ndnrtc/user/remap/streams/top_cam/low/delta/4102/data/%00%00/1/4253/150/0</div>
</div>
</div>
<div><br>
</div>
<div><br>
</div>
<div>Can these be cases of congestions on such wideband setup?</div>
<span class=""><br>
<div>
<div style="color:rgb(0,0,0);letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;word-wrap:break-word">
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<div style="color:rgb(0,0,0);letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;word-wrap:break-word">
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Thanks, </div>
<div style="color:rgb(0,0,0);font-family:Helvetica;font-style:normal;font-variant:normal;font-weight:normal;letter-spacing:normal;line-height:normal;text-align:-webkit-auto;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;word-wrap:break-word">
<br>
</div>
<div style="color:rgb(0,0,0);font-family:Helvetica;font-style:normal;font-variant:normal;font-weight:normal;letter-spacing:normal;line-height:normal;text-align:-webkit-auto;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;word-wrap:break-word">
-- <br>
Peter Gusev</div>
<div style="color:rgb(0,0,0);font-family:Helvetica;font-style:normal;font-variant:normal;font-weight:normal;letter-spacing:normal;line-height:normal;text-align:-webkit-auto;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;word-wrap:break-word">
Programmer/Analyst @ REMAP, UCLA</div>
<div style="color:rgb(0,0,0);font-family:Helvetica;font-style:normal;font-variant:normal;font-weight:normal;letter-spacing:normal;line-height:normal;text-align:-webkit-auto;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;word-wrap:break-word">
<br>
<a href="mailto:peter@remap.ucla.edu" target="_blank">peter@remap.ucla.edu</a><br>
<a href="tel:%2B1%20213%205872748" value="+12135872748" target="_blank">+1 213 5872748</a><br>
peetonn_ (skype)</div>
</div>
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