我想运行一些定期且有一定期限的任务。我想看看 linux 调度程序 (CFS) 如何处理这些任务。我不想为此使用实时操作系统,但我想看看普通的 linux 系统如何对这些类型的工作负载做出反应,以及错过了哪些截止日期。
我该怎么做呢?
我遇到了允许类似的 SCHED_DEADLINE 。尽管它将任务视为 RT 并在作业上调用诸如 EDF 之类的 RT 调度算法。即便如此,我还是想尝试一下但失败了:
#include <sched.h>
int main ()
{
struct sched_attr attr;
attr.size = sizeof(struct sched_attr);
attr.sched_policy = SCHED_DEADLINE;
attr.sched_runtime = 30000000;
attr.sched_period = 100000000;
attr.sched_deadline = attr.sched_period;
if (sched_setattr(gettid(), &attr, 0))
perror("sched_setattr()");
return 0;
}
我收到此错误:
periodic-task.c: In function ‘main’:
periodic-task.c:5:20: error: storage size of ‘attr’ isn’t known
struct sched_attr attr;
^
periodic-task.c:6:21: error: invalid application of ‘sizeof’ to incomplete type ‘struct sched_attr’
attr.size = sizeof(struct sched_attr);
^
periodic-task.c:7:22: error: ‘SCHED_DEADLINE’ undeclared (first use in this function)
attr.sched_policy = SCHED_DEADLINE;
^
periodic-task.c:7:22: note: each undeclared identifier is reported only once for each function it appears in