為了在綜合業務網絡中保障實時多媒體業務的服務質量(QoS),設計了軟實時Linux 系
統。系統中將網絡接受中斷的推后執行工作校由工作隊列來執行，而非傳統的由網絡接受軟中斷處理。工作隊列是Linux 2.6 內核的進程調度機制，對實時多媒體任務和數據任務實施不同的優先級調度，以保證實時多媒體任務的優先處理而不是盡力而為（Best Effort），保障其服務質量。通過簡單的測試證明本系統運行穩定，能夠保障實時多媒體業務的服務質量，尤其對解決延遲抖動問題有明顯的效果。關鍵詞:實時;服務質量;內核;工作隊列
Abstract:For guaranteeing Quality of Service of real-time multimedia task in the integrative
business network,a soft real-time Linux system was designed.In this system,the deferring work of eceiving interrupt in network shall be executed by work queue,but not the receiving soft-interrupt n network,which is traditional.Work queue is a new kind of bottom halves in Linux 2.6 kernel.It s the most difference from soft-interrupt that deferring work shall be executed in process ontext.Thus,under the mechanism of process scheduling in Linux 2.6 kernel,the real-time ultimedia task and data task shall be scheduled with different priority.This will guarantee the rior handling for real-time multimedia task but not Best Effort and QoS of it.A simple test has een done to certify that the system is stable,and it can guarantee the QoS of real-time multimedia ask,especially the delay jitter.
Key words:real-time,QoS,kernel,work queue