Nowadays, data centers are taking a central role in the world of ICT, due to the increase of the computational capabilities needed for modern applications, especially considering the growing importance of artificial intelligence and machine learning. In the context of data centers, that can be defined in a high level manner as a set of servers providing computational capabilities to interested parties, alongside with the increasing demand and performance needed, there is the problem of the environmental impact, especially in terms of power consumption. A technology promising with regards to these problems is asymmetric multiprocessing. Asymmetric Multiprocessors, AMPs, are processors composed by cores with different characteristics, so combining both performance oriented and power efficiency oriented capabilities. This work has the goal of exploring potential application of AMPs in the context of data centers, by implementing Petri Net models for theoretical data centers using AMPs, and analyzing their behaviour with respect to target performance indexes with JMT, a suite of Java tools for the definition and performance evaluation of computing systems, including a Queueing network and Petri net simulator.