Pileus Git - ~andy/linux/blob - kernel/sched/cpuacct.h

   1 /* Time spent by the tasks of the cpu accounting group executing in ... */
   2 enum cpuacct_stat_index {
   3         CPUACCT_STAT_USER,      /* ... user mode */
   4         CPUACCT_STAT_SYSTEM,    /* ... kernel mode */
   5
   6         CPUACCT_STAT_NSTATS,
   7 };
   8
   9 #ifdef CONFIG_CGROUP_CPUACCT
  10
  11 #include <linux/cgroup.h>
  12 /* track cpu usage of a group of tasks and its child groups */
  13 struct cpuacct {
  14         struct cgroup_subsys_state css;
  15         /* cpuusage holds pointer to a u64-type object on every cpu */
  16         u64 __percpu *cpuusage;
  17         struct kernel_cpustat __percpu *cpustat;
  18 };
  19
  20 extern struct cgroup_subsys cpuacct_subsys;
  21 extern struct cpuacct root_cpuacct;
  22
  23 /* return cpu accounting group corresponding to this container */
  24 static inline struct cpuacct *cgroup_ca(struct cgroup *cgrp)
  25 {
  26         return container_of(cgroup_subsys_state(cgrp, cpuacct_subsys_id),
  27                             struct cpuacct, css);
  28 }
  29
  30 /* return cpu accounting group to which this task belongs */
  31 static inline struct cpuacct *task_ca(struct task_struct *tsk)
  32 {
  33         return container_of(task_subsys_state(tsk, cpuacct_subsys_id),
  34                             struct cpuacct, css);
  35 }
  36
  37 static inline struct cpuacct *parent_ca(struct cpuacct *ca)
  38 {
  39         if (!ca || !ca->css.cgroup->parent)
  40                 return NULL;
  41         return cgroup_ca(ca->css.cgroup->parent);
  42 }
  43
  44 extern void cpuacct_charge(struct task_struct *tsk, u64 cputime);
  45
  46 #else
  47
  48 static inline void cpuacct_charge(struct task_struct *tsk, u64 cputime)
  49 {
  50 }
  51
  52 #endif