dbe4b41f98
So we don't open-coded initialization of cpuacct in core.c. Signed-off-by: Li Zefan <lizefan@huawei.com> Acked-by: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/r/51553687.1060906@huawei.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
57 lines
1.4 KiB
C
57 lines
1.4 KiB
C
/* Time spent by the tasks of the cpu accounting group executing in ... */
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enum cpuacct_stat_index {
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CPUACCT_STAT_USER, /* ... user mode */
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CPUACCT_STAT_SYSTEM, /* ... kernel mode */
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CPUACCT_STAT_NSTATS,
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};
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#ifdef CONFIG_CGROUP_CPUACCT
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#include <linux/cgroup.h>
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/* track cpu usage of a group of tasks and its child groups */
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struct cpuacct {
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struct cgroup_subsys_state css;
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/* cpuusage holds pointer to a u64-type object on every cpu */
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u64 __percpu *cpuusage;
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struct kernel_cpustat __percpu *cpustat;
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};
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extern struct cgroup_subsys cpuacct_subsys;
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extern struct cpuacct root_cpuacct;
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/* return cpu accounting group corresponding to this container */
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static inline struct cpuacct *cgroup_ca(struct cgroup *cgrp)
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{
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return container_of(cgroup_subsys_state(cgrp, cpuacct_subsys_id),
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struct cpuacct, css);
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}
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/* return cpu accounting group to which this task belongs */
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static inline struct cpuacct *task_ca(struct task_struct *tsk)
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{
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return container_of(task_subsys_state(tsk, cpuacct_subsys_id),
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struct cpuacct, css);
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}
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static inline struct cpuacct *parent_ca(struct cpuacct *ca)
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{
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if (!ca || !ca->css.cgroup->parent)
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return NULL;
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return cgroup_ca(ca->css.cgroup->parent);
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}
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extern void cpuacct_init(void);
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extern void cpuacct_charge(struct task_struct *tsk, u64 cputime);
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#else
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static inline void cpuacct_init(void)
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{
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}
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static inline void cpuacct_charge(struct task_struct *tsk, u64 cputime)
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{
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}
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#endif
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