Abstract: Cloud computing is a new kind of computing and service model rising in recent years．By multi-tenant strategy and pay-on-demand model,it elastically provides users with seemingly unlimited computing and storage resources．Currently,cloud computing has become the focus and hotspot of new computing models in the Internet environment．How to compare and evaluate the performance of cloud platforms with different types from different companies to provide the basis for users to select one cloud platform,has become one of problems to be solved for cloud computing performance evaluation．To solve the above problem,a performance monitoring system to cross multiple cloud platforms was designed and implemented．It provides real-time performance data monitoring based on user requirements definition,comparative analysis of performance across cloud platforms,and displays the results to users graphically.

Key words: Cloud platforms,Heterogeneity,Performance monitoring,Performance analysis