Abstract: Multi-level adaptive hierarchical scheduling (AdHierSched) framework is a virtualized real-time framework in Linux operating system,which dynamically schedules the CPU partition sizes by monitoring the demand of every subsystem during running process.This paper presents a Budget Borrowing Mechanism (BBM) in hierarchical scheduling framework.The proposed BBM can dynamically assign the CPU resource between servers in real-time systems.Moreover,in AdHierSched framework,the proposed BBM is designed and implemented for dynamical adaptation the resource parameters.Both static and dynamic tasks are utilized to evaluate the budget borrowing controller.Experiment results show that while different tasks execute in the framework with the proposed BBM,the task's deadline miss ratio is lower than those without using this mechanism.Compared with the total overhead of system,the extra overhead from budget borrowing calculation is very small.Hence,the proposed mechanism is suitable in actual applications.