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Diffstat (limited to 'arch/powerpc/kernel/time.c')
-rw-r--r--arch/powerpc/kernel/time.c55
1 files changed, 35 insertions, 20 deletions
diff --git a/arch/powerpc/kernel/time.c b/arch/powerpc/kernel/time.c
index e49e93191b6..eaa9d0e6abc 100644
--- a/arch/powerpc/kernel/time.c
+++ b/arch/powerpc/kernel/time.c
@@ -291,13 +291,12 @@ static inline u64 calculate_stolen_time(u64 stop_tb)
* Account time for a transition between system, hard irq
* or soft irq state.
*/
-void account_system_vtime(struct task_struct *tsk)
+static u64 vtime_delta(struct task_struct *tsk,
+ u64 *sys_scaled, u64 *stolen)
{
- u64 now, nowscaled, delta, deltascaled;
- unsigned long flags;
- u64 stolen, udelta, sys_scaled, user_scaled;
+ u64 now, nowscaled, deltascaled;
+ u64 udelta, delta, user_scaled;
- local_irq_save(flags);
now = mftb();
nowscaled = read_spurr(now);
get_paca()->system_time += now - get_paca()->starttime;
@@ -305,7 +304,7 @@ void account_system_vtime(struct task_struct *tsk)
deltascaled = nowscaled - get_paca()->startspurr;
get_paca()->startspurr = nowscaled;
- stolen = calculate_stolen_time(now);
+ *stolen = calculate_stolen_time(now);
delta = get_paca()->system_time;
get_paca()->system_time = 0;
@@ -322,35 +321,45 @@ void account_system_vtime(struct task_struct *tsk)
* the user ticks get saved up in paca->user_time_scaled to be
* used by account_process_tick.
*/
- sys_scaled = delta;
+ *sys_scaled = delta;
user_scaled = udelta;
if (deltascaled != delta + udelta) {
if (udelta) {
- sys_scaled = deltascaled * delta / (delta + udelta);
- user_scaled = deltascaled - sys_scaled;
+ *sys_scaled = deltascaled * delta / (delta + udelta);
+ user_scaled = deltascaled - *sys_scaled;
} else {
- sys_scaled = deltascaled;
+ *sys_scaled = deltascaled;
}
}
get_paca()->user_time_scaled += user_scaled;
- if (in_interrupt() || idle_task(smp_processor_id()) != tsk) {
- account_system_time(tsk, 0, delta, sys_scaled);
- if (stolen)
- account_steal_time(stolen);
- } else {
- account_idle_time(delta + stolen);
- }
- local_irq_restore(flags);
+ return delta;
+}
+
+void vtime_account_system(struct task_struct *tsk)
+{
+ u64 delta, sys_scaled, stolen;
+
+ delta = vtime_delta(tsk, &sys_scaled, &stolen);
+ account_system_time(tsk, 0, delta, sys_scaled);
+ if (stolen)
+ account_steal_time(stolen);
+}
+
+void vtime_account_idle(struct task_struct *tsk)
+{
+ u64 delta, sys_scaled, stolen;
+
+ delta = vtime_delta(tsk, &sys_scaled, &stolen);
+ account_idle_time(delta + stolen);
}
-EXPORT_SYMBOL_GPL(account_system_vtime);
/*
* Transfer the user and system times accumulated in the paca
* by the exception entry and exit code to the generic process
* user and system time records.
* Must be called with interrupts disabled.
- * Assumes that account_system_vtime() has been called recently
+ * Assumes that vtime_account() has been called recently
* (i.e. since the last entry from usermode) so that
* get_paca()->user_time_scaled is up to date.
*/
@@ -366,6 +375,12 @@ void account_process_tick(struct task_struct *tsk, int user_tick)
account_user_time(tsk, utime, utimescaled);
}
+void vtime_task_switch(struct task_struct *prev)
+{
+ vtime_account(prev);
+ account_process_tick(prev, 0);
+}
+
#else /* ! CONFIG_VIRT_CPU_ACCOUNTING */
#define calc_cputime_factors()
#endif