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netmap
Dummynet
The NetOS project
Geom_sched
The QFQ scheduler
OneLab
FreeBSD work
Teaching
Progettazione e Produzione Multimediale
Misc stuff
Kindle notes
Stores I have used
Hardware I like (or don't)
Interesting hardware
Misc IT-related info
Very Old Stuff
COST 264
NGC'99
RMRG Summer'99 Meeting
PIC-related stuff (obsolete)
Old software
Luigi Rizzo rizzo@iet.unipi.it
Dip. di Ingegneria dell'Informazione, Università di Pisa
via Diotisalvi 2, 56122 PISA
Phone +39-050.2211611 Fax +39-050.2217600
Google Scholar Profile

[view from my office] [:-)]
(this is the view from my office! Click on it for the full size image)


Short CV

I am an associate professor at the Dipartimento di Ingegneria dell'Informazione of the Università di Pisa, Italy. My research is in the area of computer networks, most recently on fast packet processing, packet scheduling, network emulation, disk scheduling.

In previous years i did some work on mostly on multicast, erasure coding, and multicast congestion control. Some of this work has been done with colleagues in the RMRG, funded by Cisco and Microsoft Research. More on my research page (or you can look me up on Google Scholar).

In fall 2000 I spent a few months at ACIRI/ICSI (now ICIR) in Berkeley, where I was again in fall 2001 and 2002. In fall 2003 and 2004 I have worked with the Intel Research Lab in Cambridge (UK) on a project for the Continuous Monitoring of IP networks (CoMo).

Recently I have worked in the Onelab and Onelab2 EC projects, extending the emulation features of Planetlab. This will continue with the OpenLab project starting in Sept.2011. In another recent project, CHANGE, we work on defining a Flow Processing platform for the Internet. Previous projects include E-NEXT and COST 264.

I was the General Chair of the Sigcomm 2006 conference in Pisa in September 2006, TPC Co-Chair for Sigcomm 2009 in Barcelona, co-editor of a special issue of JSAC on multicast, and co-chair for NGC'99. I have also served as a TPC member for a number of conferences (SIGCOMM, CoNext, EuroSys, NGC, ICNP, Networking).

Over time, I ended up writing a few pieces of software, related (and sometimes not) to research and teaching, see the entries on the left column for some references. Some of these things (e.g. dummynet) have become widely used, and are now part of FreeBSD. Some of my code apparently has also made it into Windows XP (which incidentally is the reason I had to change my email address!).

In the past I have also contributed a fair amount of code to an open source PBX called Asterisk.

Why I had to change my email address ?

Some viruses fetch email addresses from the file system, and use them as fake source or destination addresses for sending the emails used to replicate themselves.

My email address happens to be in the RELNOTES.HTM file which is part of the Windows XP distribution, because of some software that i wrote and that apparently Microsoft used.

Because of this, since early 2002 I (and a few other lucky people) started receiving a lot of email, both direct spam/viruses and backscatter from mail programs and virus filters which fail to detect that the sender's address is forged. I got used to that, and with [quite] a bit of manual deletion and later the help of a few simple patterns in my mail reader's configuration file, i was able to cope with the moderate (some 200 messages a day -- did I say "a lot" earlier ? well, opinions change, read further) amount of spam I was receiving.

Unfortunately, on Aug.19th, 2003 the situation got out of control. The Sobig.F virus hit a number of machines on the net, and I started receiving tens of thousands of emails per day -- 35k on the 19th, over 50k on the 20th and 21th, until the syadmins on my website decided that this was too much load for their boxes (antiviruses have a lot of processing to do) and had to disable the old address.

Eventually I ended up using some bayesian email filter and pushed the processing of my email to a separate box, so I could re-enable the old email address, just in case some old friend tries to contact me. But filters are not perfect, and some false positives are unavoidable, occasionally causing mail to be lost. Unfortunately I cannot avoid using them -- even now, after nine months, I am still receiving between 20k and 50k messages per day (slightly more when a new virus strikes, slightly less when it settles down).