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| author | Glauber Costa <glommer@parallels.com> | 2011-12-02 21:58:38 (GMT) |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2011-12-06 19:51:23 (GMT) |
| commit | 1c77f38ad623d8c3bc062f0ff9b8c5a2dfb2f1a2 (patch) | |
| tree | a4ff4aca033b73715c87868d0ce366169655825c /kernel/sched/core.c | |
| parent | 54c707e98de9ca899e6552a47c797c62c45885ee (diff) | |
| download | linux-fsl-qoriq-1c77f38ad623d8c3bc062f0ff9b8c5a2dfb2f1a2.tar.xz | |
sched/accounting: Fix user/system tick double accounting
Now that we're pointing cpuacct's root cgroup to cpustat and accounting
through task_group_account_field(), we should not access cpustat directly.
Since it is done anyway inside the acessor function, we end up accounting
it twice, which is wrong.
Signed-off-by: Glauber Costa <glommer@parallels.com>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1322863119-14225-2-git-send-email-glommer@parallels.com
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'kernel/sched/core.c')
| -rw-r--r-- | kernel/sched/core.c | 12 |
1 files changed, 2 insertions, 10 deletions
diff --git a/kernel/sched/core.c b/kernel/sched/core.c index 3e078f2..6e86010 100644 --- a/kernel/sched/core.c +++ b/kernel/sched/core.c @@ -2601,8 +2601,6 @@ static inline void task_group_account_field(struct task_struct *p, void account_user_time(struct task_struct *p, cputime_t cputime, cputime_t cputime_scaled) { - u64 *cpustat = kcpustat_this_cpu->cpustat; - u64 tmp; int index; /* Add user time to process. */ @@ -2610,13 +2608,11 @@ void account_user_time(struct task_struct *p, cputime_t cputime, p->utimescaled = cputime_add(p->utimescaled, cputime_scaled); account_group_user_time(p, cputime); - /* Add user time to cpustat. */ - tmp = cputime_to_cputime64(cputime); - index = (TASK_NICE(p) > 0) ? CPUTIME_NICE : CPUTIME_USER; - cpustat[index] += tmp; + /* Add user time to cpustat. */ task_group_account_field(p, index, cputime); + /* Account for user time used */ acct_update_integrals(p); } @@ -2662,16 +2658,12 @@ static inline void __account_system_time(struct task_struct *p, cputime_t cputime, cputime_t cputime_scaled, int index) { - u64 tmp = cputime_to_cputime64(cputime); - u64 *cpustat = kcpustat_this_cpu->cpustat; - /* Add system time to process. */ p->stime = cputime_add(p->stime, cputime); p->stimescaled = cputime_add(p->stimescaled, cputime_scaled); account_group_system_time(p, cputime); /* Add system time to cpustat. */ - cpustat[index] += tmp; task_group_account_field(p, index, cputime); /* Account for system time used */ |