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Cputime cleanups on reader side:

Browse source 
* Improve naming and code location
 
 * Consolidate adjustment code
 
 * Comment the adjustement code
 
 Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
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Merge tag 'cputime-adjustment-cleanups' of git://git.kernel.org/pub/scm/linux/kernel/git/frederic/linux-dynticks into sched/core

Pull cputime cleanups from Frederic Weisbecker:

 * Improve naming and code location

 * Consolidate adjustment code

 * Comment the adjustement code

Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
This commit is contained in:
Ingo Molnar 2012-12-08 15:31:07 +01:00
commit e783377e93
13 changed files with 119 additions and 205 deletions
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27
include/linux/sched.h
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@ -433,14 +433,29 @@ struct cpu_itimer {
u32 incr_error;
};
/**
* struct cputime - snaphsot of system and user cputime
* @utime: time spent in user mode
* @stime: time spent in system mode
*
* Gathers a generic snapshot of user and system time.
*/
struct cputime {
cputime_t utime;
cputime_t stime;
};
/**
* struct task_cputime - collected CPU time counts
* @utime: time spent in user mode, in &cputime_t units
* @stime: time spent in kernel mode, in &cputime_t units
* @sum_exec_runtime: total time spent on the CPU, in nanoseconds
*
* This structure groups together three kinds of CPU time that are
* tracked for threads and thread groups. Most things considering
* This is an extension of struct cputime that includes the total runtime
* spent by the task from the scheduler point of view.
*
* As a result, this structure groups together three kinds of CPU time
* that are tracked for threads and thread groups. Most things considering
* CPU time want to group these counts together and treat all three
* of them in parallel.
*/
@ -581,7 +596,7 @@ struct signal_struct {
cputime_t gtime;
cputime_t cgtime;
#ifndef CONFIG_VIRT_CPU_ACCOUNTING
cputime_t prev_utime, prev_stime;
struct cputime prev_cputime;
#endif
unsigned long nvcsw, nivcsw, cnvcsw, cnivcsw;
unsigned long min_flt, maj_flt, cmin_flt, cmaj_flt;
@ -1340,7 +1355,7 @@ struct task_struct {
cputime_t utime, stime, utimescaled, stimescaled;
cputime_t gtime;
#ifndef CONFIG_VIRT_CPU_ACCOUNTING
cputime_t prev_utime, prev_stime;
struct cputime prev_cputime;
#endif
unsigned long nvcsw, nivcsw; /* context switch counts */
struct timespec start_time; /* monotonic time */
@ -1751,8 +1766,8 @@ static inline void put_task_struct(struct task_struct *t)
__put_task_struct(t);
}
extern void task_times(struct task_struct *p, cputime_t *ut, cputime_t *st);
extern void thread_group_times(struct task_struct *p, cputime_t *ut, cputime_t *st);
extern void task_cputime_adjusted(struct task_struct *p, cputime_t *ut, cputime_t *st);
extern void thread_group_cputime_adjusted(struct task_struct *p, cputime_t *ut, cputime_t *st);
/*
* Per process flags