并行帧缓存设备:基于多核CPU的Xorg并行显示优化

Parallel Frame Buffer Device:Graphics Acceleration Based on Multi-core CPU for Xorg

Xorg图形服务器软件在帧缓存设备上采用单线程绘制模式,难以发挥多核CPU的性能.针对多核CPU上的帧缓存设备,设计了带有互斥操作的任务队列,并按照屏幕划分的方法,实现了Xorg的矩形填充操作在帧缓存设备上基于私有任务队列的多线程并行化,并实现了主从线程负载均衡.x11perf测试结果表明,该算法在一台4核商用台式机上的加速比可以达到2.06.

Xorg server is running in single-threaded mode on frame buffer device,which is hard to obtain good performance on multicore CPU.For frame buffer device on multi-core CPU,a task queue is designed with mutual-inclusion,screen is split into several sub-screens,and each sub-screen is attached with a thread to draw rectangles within that sub-screen.A private task queue for each thread is used to hold their own tasks to draw rectangles,and load balance is kept between the main thread and each sub-thread.Results of x11perf show that rectangles filling operation could reach a speed-up ratio of 2.06 on a 4-core DELL desktop computer.