Is it possible to slow down time in the Java virtual machine according to CPU usage by modification of the source code of OpenJDK? I have a network simulation (Java to ns-3) which consumes real time, synchronised loosely to the wall clock. However, because I run so many clients in the simulation, the CPU usage hits 100% and hard guarantees aren't maintained about how long events in the simulator should take to process (i.e., a high amount of super-late events). Therefore, the simulation tops out at around 40 nodes when there's a lot of network traffic, and even then it's a bit iffy. The ideal solution would be to slow down time according to CPU, but I'm not sure how to do this successfully. A lesser solution is to just slow down time by some multiple (time lensing?).
If someone could give some guidance, the source code for the relevant file in question (for Windows) is at http://pastebin.com/RSQpCdbD. I've tried modifying some parts of the file, but my results haven't really been very successful.
Thanks in advance,
Chris
You might look at VirtualBox, which allows one to Accelerate or slow down the guest clock from the command line.