Multithreading Models o The relationship between user threads and kernel threads ①Many-to-one[n:1] One-to-One [1:1] Many-to-Many [n:m] Many-to-One [n:1] Many user-level threads user thread mapped to single kernel thread Examples: Solaris Green Threads GNU Portable Threads kernel thread 口1⊙生年12月00 陈话兰xlanchen@ustc.edu.cn http/staff.u0117401 Operating System操作系统原理斐 March29,201911/44. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Multithreading Models The relationship between user threads and kernel threads 1 Many-to-One [n:1] 2 One-to-One [1:1] 3 Many-to-Many [n:m] 1 Many-to-One [n:1] ▶ Many user-level threads mapped to single kernel thread ▶ Examples: ⋆ Solaris Green Threads ⋆ GNU Portable Threads k user thread kernel thread 陈香兰 xlanchen@ustc.edu.cn http://staff.ustc.edu.cn/~xlanchen (Computer Application Laboratory, CS, USTC @ Hefei Embedded System Laboratory, CS, USTC @ Suzhou) 0117401: Operating System 操作系统原理与设计 March 29, 2019 11 / 44