#summary this page collects references on scaling time for network emulation

= References =

 * VAN Testbed - Telcordia/CERDEC
   Modified Xen hypervisor monitors Discrete Event Simulator (DES) clock to provide VMs with a _slowdown factor_. <br>
   http://portal.acm.org/citation.cfm?id=1831353 <br>
   http://portal.acm.org/citation.cfm?id=1857024 <br>
   http://www.computer.org/portal/web/csdl/doi/10.1109/TRIDENTCOM.2009.4976204

 * DieCast - UCSD
   _time dilation_ <br>
   Modified Xen hypervisor to make time appear slower to guest OS.<br>
   http://www.usenix.org/event/nsdi08/tech/gupta.html <br>
   http://cseweb.ucsd.edu/~kyocum/pubs/P2P-2009.pdf <br>
   http://sysnet.ucsd.edu/projects/time-dilation/

 * SliceTime/Synchronized Network Emulation - RWTH Aachen University
   http://portal.acm.org/citation.cfm?id=1453185 <br>
   http://www.comsys.rwth-aachen.de/research/projects/slicetime/

 * Emulab Checkpoints
   Modified Xen hypervisor with time virtualization to support checkpointing (pausing) a distributed emulation.<br>
   Transparent Checkpoints of Closed Distributed Systems in Emulab. Anton Burtsev, Prashanth Radhakrishnan, Mike Hibler, and Jay Lepreau. In Proc. of the Fourth ACM European Conference on Computer Systems, pages 173–186, Nuremberg, Germany, April 2009.

 * Linux Time namespace - Jeff Dike (UML creator)
   Add a time namespace to the Linux kernel, allowing for gettimeofday() offsets.<br>
   http://lkml.indiana.edu/hypermail/linux/kernel/0604.1/1225.html

 * Virtual Time for OpenVZ
    Yuhao Zheng David M. Nicol, Dong Jin. A virtual time system for OpenVZ-based network emulations. In Proceedings of the [https://sites.google.com/site/pads2011/ 2011 Symposium on Principles of Advanced and Distributed Simulation], pages 1–10, Nice, France, June 2011.<br>
    Dong Jin, Yuhao Zheng, Huaiyu Zhu, David M. Nicol and Lenhard Winterrowd. Virtual Time Integration of Emulation and Parallel Simulation, In Proceedings of the 26th Conference on Principles of Advanced and Distributed Simulation (PADS), Zhangjiajie, China, 2012.