多核处理器中的线程

Processor affinity is a modification of the native central queue scheduling 
algorithm in a symmetric multiprocessing operating system. Each task 
(be it process or thread) in the queue has a tag indicating its 
preferred / kin processor. At allocation time,each task is allocated to
its kin processor in preference to others.

查看this thread,其中讨论了为特定线程设置亲和性的用法.
摘自此主题：

int sched_setaffinity(pid_t pid,size_t cpusetsize,cpu_set_t *mask);

Passing 0 as the pid,and it'll apply to the current thread only,or have other
thread report their kernel pid with the linux specific call pid_t gettid(void);
and pass that in as the pid.