A method of balancing load on multiple cores includes maintaining multiple bitmaps in a global memory location. Each bitmap indicates loads of the threads included in a thread domain. The multiple threads are associated with each core. Each core maintains and updates the respective bitmap based on the loads of the threads. The multiple bitmaps are maintained in the global memory location which is accessible by a multiple thread domains configured to execute threads using the cores. Execution of the multiple thread domains is balanced using the multiple cores based on loads of each thread described in each bitmap.