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Commit 38130ec0 authored by Ingo Molnar's avatar Ingo Molnar
Browse files

Merge tag 'sched-cputime-for-mingo' of... 

Merge tag 'sched-cputime-for-mingo' of git://git.kernel.org/pub/scm/linux/kernel/git/frederic/linux-dynticks

 into sched/core

Pull more cputime cleanups from Frederic Weisbecker:

 * Get rid of underscores polluting the vtime namespace

 * Consolidate context switch and tick handling

 * Improve debuggability by detecting irq unsafe callers

Signed-off-by: default avatarFrederic Weisbecker <fweisbec@gmail.com>
Signed-off-by: default avatarIngo Molnar <mingo@kernel.org>
parents e783377e 1b2852b1

arch/ia64/include/asm/cputime.h

+2 −0
Original line number Diff line number Diff line
@@ -103,5 +103,7 @@ static inline void cputime_to_timeval(const cputime_t ct, struct timeval *val) 
#define cputime64_to_clock_t(__ct)	\

	cputime_to_clock_t((__force cputime_t)__ct)



extern void arch_vtime_task_switch(struct task_struct *tsk);



#endif /* CONFIG_VIRT_CPU_ACCOUNTING */

#endif /* __IA64_CPUTIME_H */

arch/ia64/kernel/time.c

+6 −20
Original line number Diff line number Diff line
@@ -83,7 +83,7 @@ static struct clocksource *itc_clocksource; 


extern cputime_t cycle_to_cputime(u64 cyc);



static void vtime_account_user(struct task_struct *tsk)

void vtime_account_user(struct task_struct *tsk)

{

	cputime_t delta_utime;

	struct thread_info *ti = task_thread_info(tsk);
@@ -100,18 +100,11 @@ static void vtime_account_user(struct task_struct *tsk) 
 * accumulated times to the current process, and to prepare accounting on

 * the next process.

 */

void vtime_task_switch(struct task_struct *prev)

void arch_vtime_task_switch(struct task_struct *prev)

{

	struct thread_info *pi = task_thread_info(prev);

	struct thread_info *ni = task_thread_info(current);



	if (idle_task(smp_processor_id()) != prev)

		__vtime_account_system(prev);

	else

		__vtime_account_idle(prev);



	vtime_account_user(prev);



	pi->ac_stamp = ni->ac_stamp;

	ni->ac_stime = ni->ac_utime = 0;

}
@@ -126,6 +119,8 @@ static cputime_t vtime_delta(struct task_struct *tsk) 
	cputime_t delta_stime;

	__u64 now;



	WARN_ON_ONCE(!irqs_disabled());



	now = ia64_get_itc();



	delta_stime = cycle_to_cputime(ti->ac_stime + (now - ti->ac_stamp));
@@ -135,27 +130,18 @@ static cputime_t vtime_delta(struct task_struct *tsk) 
	return delta_stime;

}



void __vtime_account_system(struct task_struct *tsk)

void vtime_account_system(struct task_struct *tsk)

{

	cputime_t delta = vtime_delta(tsk);



	account_system_time(tsk, 0, delta, delta);

}



void __vtime_account_idle(struct task_struct *tsk)

void vtime_account_idle(struct task_struct *tsk)

{

	account_idle_time(vtime_delta(tsk));

}



/*

 * Called from the timer interrupt handler to charge accumulated user time

 * to the current process.  Must be called with interrupts disabled.

 */

void account_process_tick(struct task_struct *p, int user_tick)

{

	vtime_account_user(p);

}



#endif /* CONFIG_VIRT_CPU_ACCOUNTING */



static irqreturn_t

arch/powerpc/include/asm/cputime.h

+2 −0
Original line number Diff line number Diff line
@@ -228,6 +228,8 @@ static inline cputime_t clock_t_to_cputime(const unsigned long clk) 


#define cputime64_to_clock_t(ct)	cputime_to_clock_t((cputime_t)(ct))



static inline void arch_vtime_task_switch(struct task_struct *tsk) { }



#endif /* __KERNEL__ */

#endif /* CONFIG_VIRT_CPU_ACCOUNTING */

#endif /* __POWERPC_CPUTIME_H */

arch/powerpc/kernel/time.c

+10 −14
Original line number Diff line number Diff line
@@ -297,6 +297,8 @@ static u64 vtime_delta(struct task_struct *tsk, 
	u64 now, nowscaled, deltascaled;

	u64 udelta, delta, user_scaled;



	WARN_ON_ONCE(!irqs_disabled());



	now = mftb();

	nowscaled = read_spurr(now);

	get_paca()->system_time += now - get_paca()->starttime;
@@ -336,7 +338,7 @@ static u64 vtime_delta(struct task_struct *tsk, 
	return delta;

}



void __vtime_account_system(struct task_struct *tsk)

void vtime_account_system(struct task_struct *tsk)

{

	u64 delta, sys_scaled, stolen;
@@ -346,7 +348,7 @@ void __vtime_account_system(struct task_struct *tsk) 
		account_steal_time(stolen);

}



void __vtime_account_idle(struct task_struct *tsk)

void vtime_account_idle(struct task_struct *tsk)

{

	u64 delta, sys_scaled, stolen;
@@ -355,15 +357,15 @@ void __vtime_account_idle(struct task_struct *tsk) 
}



/*

 * 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.

 * Transfer the user time accumulated in the paca

 * by the exception entry and exit code to the generic

 * process user time records.

 * Must be called with interrupts disabled.

 * Assumes that vtime_account() has been called recently

 * (i.e. since the last entry from usermode) so that

 * Assumes that vtime_account_system/idle() has been called

 * recently (i.e. since the last entry from usermode) so that

 * get_paca()->user_time_scaled is up to date.

 */

void account_process_tick(struct task_struct *tsk, int user_tick)

void vtime_account_user(struct task_struct *tsk)

{

	cputime_t utime, utimescaled;
@@ -375,12 +377,6 @@ 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

arch/s390/include/asm/cputime.h

+1 −0
Original line number Diff line number Diff line
@@ -14,6 +14,7 @@ 




#define __ARCH_HAS_VTIME_ACCOUNT

#define __ARCH_HAS_VTIME_TASK_SWITCH



/* We want to use full resolution of the CPU timer: 2**-12 micro-seconds. */