[PATCH 19/23] vtime: Always scale generic vtime accounting results

From: Frederic Weisbecker
Date: Wed Jul 31 2013 - 20:35:23 EST

The cputime accounting in full dynticks can be a subtle
mixup of CPUs using tick based accounting and others using
generic vtime.

As long as the tick can have a share on producing these stats, we
want to scale the result against CFS precise accounting as the tick
can miss some task hiding between the periodic interrupt.

Signed-off-by: Frederic Weisbecker <fweisbec@xxxxxxxxx>
Cc: Steven Rostedt <rostedt@xxxxxxxxxxx>
Cc: Paul E. McKenney <paulmck@xxxxxxxxxxxxxxxxxx>
Cc: Ingo Molnar <mingo@xxxxxxxxxx>
Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Cc: Borislav Petkov <bp@xxxxxxxxx>
Cc: Li Zhong <zhong@xxxxxxxxxxxxxxxxxx>
Cc: Mike Galbraith <efault@xxxxxx>
Cc: Kevin Hilman <khilman@xxxxxxxxxx>
kernel/sched/cputime.c | 6 ------
1 files changed, 0 insertions(+), 6 deletions(-)

diff --git a/kernel/sched/cputime.c b/kernel/sched/cputime.c
index 0831b06..e9e742e 100644
--- a/kernel/sched/cputime.c
+++ b/kernel/sched/cputime.c
@@ -553,12 +553,6 @@ static void cputime_adjust(struct task_cputime *curr,
cputime_t rtime, stime, utime, total;

- if (vtime_accounting_enabled()) {
- *ut = curr->utime;
- *st = curr->stime;
- return;
- }
stime = curr->stime;
total = stime + curr->utime;


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