aboutsummaryrefslogtreecommitdiff
path: root/kernel/sched/cputime.c
diff options
context:
space:
mode:
authorFrederic Weisbecker <fweisbec@gmail.com>2012-11-22 00:58:35 +0100
committerFrederic Weisbecker <fweisbec@gmail.com>2012-11-28 17:08:10 +0100
commitd37f761dbd276790f70dcf73a287fde2c3464482 (patch)
tree302d4bda699ab2e159b3a180f253019a38bf8132 /kernel/sched/cputime.c
parente80d0a1ae8bb8fee0edd37427836f108b30f596b (diff)
downloadlinaro-lsk-d37f761dbd276790f70dcf73a287fde2c3464482.tar.gz
cputime: Consolidate cputime adjustment code
task_cputime_adjusted() and thread_group_cputime_adjusted() essentially share the same code. They just don't use the same source: * The first function uses the cputime in the task struct and the previous adjusted snapshot that ensures monotonicity. * The second adds the cputime of all tasks in the group and the previous adjusted snapshot of the whole group from the signal structure. Just consolidate the common code that does the adjustment. These functions just need to fetch the values from the appropriate source. Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com> Cc: Ingo Molnar <mingo@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Paul Gortmaker <paul.gortmaker@windriver.com>
Diffstat (limited to 'kernel/sched/cputime.c')
-rw-r--r--kernel/sched/cputime.c46
1 files changed, 23 insertions, 23 deletions
diff --git a/kernel/sched/cputime.c b/kernel/sched/cputime.c
index 7dc155371b9..220fdc4db77 100644
--- a/kernel/sched/cputime.c
+++ b/kernel/sched/cputime.c
@@ -516,14 +516,18 @@ static cputime_t scale_utime(cputime_t utime, cputime_t rtime, cputime_t total)
return (__force cputime_t) temp;
}
-void task_cputime_adjusted(struct task_struct *p, cputime_t *ut, cputime_t *st)
+static void cputime_adjust(struct task_cputime *curr,
+ struct cputime *prev,
+ cputime_t *ut, cputime_t *st)
{
- cputime_t rtime, utime = p->utime, total = utime + p->stime;
+ cputime_t rtime, utime, total;
+ utime = curr->utime;
+ total = utime + curr->stime;
/*
* Use CFS's precise accounting:
*/
- rtime = nsecs_to_cputime(p->se.sum_exec_runtime);
+ rtime = nsecs_to_cputime(curr->sum_exec_runtime);
if (total)
utime = scale_utime(utime, rtime, total);
@@ -533,11 +537,22 @@ void task_cputime_adjusted(struct task_struct *p, cputime_t *ut, cputime_t *st)
/*
* Compare with previous values, to keep monotonicity:
*/
- p->prev_utime = max(p->prev_utime, utime);
- p->prev_stime = max(p->prev_stime, rtime - p->prev_utime);
+ prev->utime = max(prev->utime, utime);
+ prev->stime = max(prev->stime, rtime - prev->utime);
+
+ *ut = prev->utime;
+ *st = prev->stime;
+}
- *ut = p->prev_utime;
- *st = p->prev_stime;
+void task_cputime_adjusted(struct task_struct *p, cputime_t *ut, cputime_t *st)
+{
+ struct task_cputime cputime = {
+ .utime = p->utime,
+ .stime = p->stime,
+ .sum_exec_runtime = p->se.sum_exec_runtime,
+ };
+
+ cputime_adjust(&cputime, &p->prev_cputime, ut, st);
}
/*
@@ -545,24 +560,9 @@ void task_cputime_adjusted(struct task_struct *p, cputime_t *ut, cputime_t *st)
*/
void thread_group_cputime_adjusted(struct task_struct *p, cputime_t *ut, cputime_t *st)
{
- struct signal_struct *sig = p->signal;
struct task_cputime cputime;
- cputime_t rtime, utime, total;
thread_group_cputime(p, &cputime);
-
- total = cputime.utime + cputime.stime;
- rtime = nsecs_to_cputime(cputime.sum_exec_runtime);
-
- if (total)
- utime = scale_utime(cputime.utime, rtime, total);
- else
- utime = rtime;
-
- sig->prev_utime = max(sig->prev_utime, utime);
- sig->prev_stime = max(sig->prev_stime, rtime - sig->prev_utime);
-
- *ut = sig->prev_utime;
- *st = sig->prev_stime;
+ cputime_adjust(&cputime, &p->signal->prev_cputime, ut, st);
}
#endif