Forwarded with permission Begin forwarded message:
> From: Jon Crowcroft <[email protected]> > Subject: packet loss (and therefore ECN) might not happen much actually > Date: March 4, 2014 at 16:39:22 GMT > To: "Eggert, Lars" <[email protected]> > Cc: <[email protected]> > > see also this upcoming trace driven study: > http://www.ee.ucl.ac.uk/~uceejoa/publications/infocom.pdf > > it looks like (in japan at least) TCP is very rarely controlled by packet > loss (dupack or timeout) but more by > sender or receiver rate limiting (or just being too short lived:) > > In missive <[email protected]>, "Eggert, Lars" > typed: > >>> >>> Begin forwarded message: >>> >>>> From: Jon Crowcroft <[email protected]> >>>> Subject: sorry, dont have chairs emails to hand so...metrics for AQM >>>> Date: March 4, 2014 at 15:40:12 GMT >>>> To: "Eggert, Lars" <[email protected]> >>>> =20 >>>> there were a stack of metrics for comparing ABR mechanisms back in the = >>> ATM days - many would translate quite well for AQM (with or without = >>> ECN:) >>>> see for example this thesis advised by Raj Jain (he of the Fairness = >>> index people talk about in context of tcp a lot:) >>>> http://www.shivkumar.org/research/papers/shivdissertation97.pdf >>>> =20 >>>> j. >>> >>> >>> --Apple-Mail=_06212177-1BE8-4B46-9802-A93C9A97A569 >>> Content-Transfer-Encoding: quoted-printable >>> Content-Type: text/html; >>> charset=iso-8859-1 >>> >>> <html><head><meta http-equiv=3D"Content-Type" content=3D"text/html = >>> charset=3Diso-8859-1"></head><body style=3D"word-wrap: break-word; = >>> -webkit-nbsp-mode: space; -webkit-line-break: = >>> after-white-space;"><br><div><br><div>Begin forwarded message:</div><br = >>> class=3D"Apple-interchange-newline"><blockquote type=3D"cite"><div = >>> style=3D"margin-top: 0px; margin-right: 0px; margin-bottom: 0px; = >>> margin-left: 0px;"><span style=3D"font-family:'Helvetica'; color:rgba(0, = >>> 0, 0, 1.0);"><b>From: </b></span><span = >>> style=3D"font-family:'Helvetica';">Jon Crowcroft <<a = >>> href=3D"mailto:[email protected]";>[email protected]</a>&= >>> gt;<br></span></div><div style=3D"margin-top: 0px; margin-right: 0px; = >>> margin-bottom: 0px; margin-left: 0px;"><span = >>> style=3D"font-family:'Helvetica'; color:rgba(0, 0, 0, 1.0);"><b>Subject: = >>> </b></span><span style=3D"font-family:'Helvetica';"><b>sorry, dont have = >>> chairs emails to hand so...metrics for AQM</b><br></span></div><div = >>> style=3D"margin-top: 0px; margin-right: 0px; margin-bottom: 0px; = >>> margin-left: 0px;"><span style=3D"font-family:'Helvetica'; color:rgba(0, = >>> 0, 0, 1.0);"><b>Date: </b></span><span = >>> style=3D"font-family:'Helvetica';">March 4, 2014 at 15:40:12 = >>> GMT<br></span></div><div style=3D"margin-top: 0px; margin-right: 0px; = >>> margin-bottom: 0px; margin-left: 0px;"><span = >>> style=3D"font-family:'Helvetica'; color:rgba(0, 0, 0, 1.0);"><b>To: = >>> </b></span><span style=3D"font-family:'Helvetica';">"Eggert, Lars" = >>> <<a = >>> href=3D"mailto:[email protected]";>[email protected]</a>><br></span></div><b= >>> r><div><meta http-equiv=3D"Content-Type" content=3D"text/html; = >>> charset=3Diso-8859-1"><div dir=3D"ltr">there were a stack of metrics for = >>> comparing ABR mechanisms back in the ATM days - many would translate = >>> quite well for AQM (with or without ECN:)<div>see for example this = >>> thesis advised by Raj Jain (he of the Fairness index people talk about = >>> in context of tcp a lot:)</div> >>> <div><a = >>> href=3D"http://www.shivkumar.org/research/papers/shivdissertation97.pdf";>h= >>> ttp://www.shivkumar.org/research/papers/shivdissertation97.pdf</a><br></di= >>> v><div><br></div><div>j.</div></div> >>> </div></blockquote></div><br></body></html>= >>> >>> --Apple-Mail=_06212177-1BE8-4B46-9802-A93C9A97A569-- >>> >>> --Apple-Mail=_E069BE08-CFCB-49D9-ACF2-341B4333EBF4 >>> Content-Transfer-Encoding: 7bit >>> Content-Disposition: attachment; filename="signature.asc" >>> Content-Type: application/pgp-signature; name="signature.asc" >>> Content-Description: Message signed with OpenPGP using GPGMail >>> >>> -----BEGIN PGP SIGNATURE----- >>> >>> iQCVAwUBUxX8PtZcnpRveo1xAQIp+wP+IWIS0CKa8tSTCt/TToAmfmilB7V4CgQo >>> 2hByWToZr94vcPCpzduZ1AWymGcDh0bDTS4nL7gKxruPzqpoKGC6wLnfFCBqm450 >>> YYZMfJjD8pM9JnkQu46QdcQ03CUK+r4MO6ZCA7VPO22/pCDweTw6TtQWEYqRzaMs >>> AwyLMUuIjBQ= >>> =UDgK >>> -----END PGP SIGNATURE----- >>> >>> --Apple-Mail=_E069BE08-CFCB-49D9-ACF2-341B4333EBF4-- > > cheers > > jon >
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