diff options
author | Stephen Rothwell <sfr@canb.auug.org.au> | 2008-12-08 19:48:02 +1100 |
---|---|---|
committer | Stephen Rothwell <sfr@canb.auug.org.au> | 2008-12-08 19:48:02 +1100 |
commit | b3a64b1bcd17eb1a40ec210d71655a8fd2a6297b (patch) | |
tree | 98fae9e1a74ccec740043637bed8905ee1fbd419 /arch | |
parent | e5c1988d4594f914d78957422f44828b337a9497 (diff) | |
parent | cb7a571b4a340933645567428c0bb47544e4926d (diff) |
Merge commit 'cputime/cputime'
Conflicts:
kernel/sched.c
Diffstat (limited to 'arch')
-rw-r--r-- | arch/ia64/kernel/time.c | 18 | ||||
-rw-r--r-- | arch/powerpc/kernel/process.c | 1 | ||||
-rw-r--r-- | arch/powerpc/kernel/time.c | 18 | ||||
-rw-r--r-- | arch/s390/include/asm/cpu.h | 4 | ||||
-rw-r--r-- | arch/s390/kernel/process.c | 74 | ||||
-rw-r--r-- | arch/s390/kernel/s390_ext.c | 2 | ||||
-rw-r--r-- | arch/s390/kernel/smp.c | 25 | ||||
-rw-r--r-- | arch/s390/kernel/vtime.c | 16 | ||||
-rw-r--r-- | arch/x86/xen/time.c | 10 |
9 files changed, 102 insertions, 66 deletions
diff --git a/arch/ia64/kernel/time.c b/arch/ia64/kernel/time.c index 65c10a42c88f..f0ebb342409d 100644 --- a/arch/ia64/kernel/time.c +++ b/arch/ia64/kernel/time.c @@ -93,13 +93,14 @@ void ia64_account_on_switch(struct task_struct *prev, struct task_struct *next) now = ia64_get_itc(); delta_stime = cycle_to_cputime(pi->ac_stime + (now - pi->ac_stamp)); - account_system_time(prev, 0, delta_stime); - account_system_time_scaled(prev, delta_stime); + if (idle_task(smp_processor_id()) != prev) + account_system_time(prev, 0, delta_stime, delta_stime); + else + account_idle_time(delta_stime); if (pi->ac_utime) { delta_utime = cycle_to_cputime(pi->ac_utime); - account_user_time(prev, delta_utime); - account_user_time_scaled(prev, delta_utime); + account_user_time(prev, delta_utime, delta_utime); } pi->ac_stamp = ni->ac_stamp = now; @@ -122,8 +123,10 @@ void account_system_vtime(struct task_struct *tsk) now = ia64_get_itc(); delta_stime = cycle_to_cputime(ti->ac_stime + (now - ti->ac_stamp)); - account_system_time(tsk, 0, delta_stime); - account_system_time_scaled(tsk, delta_stime); + if (irq_count() || idle_task(smp_processor_id()) != tsk) + account_system_time(tsk, 0, delta_stime, delta_stime); + else + account_idle_time(delta_stime); ti->ac_stime = 0; ti->ac_stamp = now; @@ -143,8 +146,7 @@ void account_process_tick(struct task_struct *p, int user_tick) if (ti->ac_utime) { delta_utime = cycle_to_cputime(ti->ac_utime); - account_user_time(p, delta_utime); - account_user_time_scaled(p, delta_utime); + account_user_time(p, delta_utime, delta_utime); ti->ac_utime = 0; } } diff --git a/arch/powerpc/kernel/process.c b/arch/powerpc/kernel/process.c index 51b201ddf9a1..fb7049c054c0 100644 --- a/arch/powerpc/kernel/process.c +++ b/arch/powerpc/kernel/process.c @@ -33,6 +33,7 @@ #include <linux/mqueue.h> #include <linux/hardirq.h> #include <linux/utsname.h> +#include <linux/kernel_stat.h> #include <asm/pgtable.h> #include <asm/uaccess.h> diff --git a/arch/powerpc/kernel/time.c b/arch/powerpc/kernel/time.c index 99f1ddd68582..c9564031a2a9 100644 --- a/arch/powerpc/kernel/time.c +++ b/arch/powerpc/kernel/time.c @@ -256,8 +256,10 @@ void account_system_vtime(struct task_struct *tsk) delta += sys_time; get_paca()->system_time = 0; } - account_system_time(tsk, 0, delta); - account_system_time_scaled(tsk, deltascaled); + if (in_irq() || idle_task(smp_processor_id()) != tsk) + account_system_time(tsk, 0, delta, deltascaled); + else + account_idle_time(delta); per_cpu(cputime_last_delta, smp_processor_id()) = delta; per_cpu(cputime_scaled_last_delta, smp_processor_id()) = deltascaled; local_irq_restore(flags); @@ -275,10 +277,8 @@ void account_process_tick(struct task_struct *tsk, int user_tick) utime = get_paca()->user_time; get_paca()->user_time = 0; - account_user_time(tsk, utime); - utimescaled = cputime_to_scaled(utime); - account_user_time_scaled(tsk, utimescaled); + account_user_time(tsk, utime, utimescaled); } /* @@ -338,8 +338,12 @@ void calculate_steal_time(void) tb = mftb(); purr = mfspr(SPRN_PURR); stolen = (tb - pme->tb) - (purr - pme->purr); - if (stolen > 0) - account_steal_time(current, stolen); + if (stolen > 0) { + if (idle_task(smp_processor_id()) != current) + account_steal_time(stolen); + else + account_idle_time(stolen); + } pme->tb = tb; pme->purr = purr; } diff --git a/arch/s390/include/asm/cpu.h b/arch/s390/include/asm/cpu.h index e5a6a9ba3adf..a6f6ac397b06 100644 --- a/arch/s390/include/asm/cpu.h +++ b/arch/s390/include/asm/cpu.h @@ -14,8 +14,8 @@ struct s390_idle_data { spinlock_t lock; - unsigned int in_idle; unsigned long long idle_count; + unsigned long long idle_delta; unsigned long long idle_enter; unsigned long long idle_time; }; @@ -26,7 +26,7 @@ void s390_idle_leave(void); static inline void s390_idle_check(void) { - if ((&__get_cpu_var(s390_idle))->in_idle) + if ((&__get_cpu_var(s390_idle))->idle_enter != 0ULL) s390_idle_leave(); } diff --git a/arch/s390/kernel/process.c b/arch/s390/kernel/process.c index 04f8c67a6101..b6bc20862221 100644 --- a/arch/s390/kernel/process.c +++ b/arch/s390/kernel/process.c @@ -38,6 +38,7 @@ #include <linux/utsname.h> #include <linux/tick.h> #include <linux/elfcore.h> +#include <linux/kernel_stat.h> #include <asm/uaccess.h> #include <asm/pgtable.h> #include <asm/system.h> @@ -79,30 +80,26 @@ DEFINE_PER_CPU(struct s390_idle_data, s390_idle) = { .lock = __SPIN_LOCK_UNLOCKED(s390_idle.lock) }; -static int s390_idle_enter(void) +void s390_idle_leave(void) { struct s390_idle_data *idle; + unsigned long long idle_time; idle = &__get_cpu_var(s390_idle); + idle_time = S390_lowcore.int_clock - idle->idle_enter; +#ifdef CONFIG_VIRT_CPU_ACCOUNTING + idle_time += idle->idle_delta; + idle->idle_delta = idle_time & 4095; + idle_time -= idle->idle_delta; + account_idle_time(idle_time >> 12); + S390_lowcore.last_update_clock = S390_lowcore.int_clock; +#endif spin_lock(&idle->lock); + idle->idle_time += idle_time; + idle->idle_enter = 0ULL; idle->idle_count++; - idle->in_idle = 1; - idle->idle_enter = get_clock(); spin_unlock(&idle->lock); - vtime_stop_cpu_timer(); - return NOTIFY_OK; -} - -void s390_idle_leave(void) -{ - struct s390_idle_data *idle; - vtime_start_cpu_timer(); - idle = &__get_cpu_var(s390_idle); - spin_lock(&idle->lock); - idle->idle_time += get_clock() - idle->idle_enter; - idle->in_idle = 0; - spin_unlock(&idle->lock); } extern void s390_handle_mcck(void); @@ -111,16 +108,16 @@ extern void s390_handle_mcck(void); */ static void default_idle(void) { + struct s390_idle_data *idle = &__get_cpu_var(s390_idle); + unsigned long addr; + psw_t psw; + /* CPU is going idle. */ local_irq_disable(); if (need_resched()) { local_irq_enable(); return; } - if (s390_idle_enter() == NOTIFY_BAD) { - local_irq_enable(); - return; - } #ifdef CONFIG_HOTPLUG_CPU if (cpu_is_offline(smp_processor_id())) { preempt_enable_no_resched(); @@ -138,9 +135,42 @@ static void default_idle(void) trace_hardirqs_on(); /* Don't trace preempt off for idle. */ stop_critical_timings(); + vtime_stop_cpu_timer(); + + /* + * The inline assembly is equivalent to + * idle->idle_enter = get_clock(); + * __load_psw_mask(psw_kernel_bits | PSW_MASK_WAIT | + * PSW_MASK_IO | PSW_MASK_EXT); + * The difference is that the inline assembly makes sure that + * the stck instruction is right before the lpsw instruction. + * This is done to increase the precision. + */ + /* Wait for external, I/O or machine check interrupt. */ - __load_psw_mask(psw_kernel_bits | PSW_MASK_WAIT | - PSW_MASK_IO | PSW_MASK_EXT); + psw.mask = psw_kernel_bits|PSW_MASK_WAIT|PSW_MASK_IO|PSW_MASK_EXT; +#ifndef __s390x__ + asm volatile( + " basr %0,0\n" + "0: ahi %0,1f-0b\n" + " st %0,4(%2)\n" + " stck 0(%3)\n" + " lpsw 0(%2)\n" + "1:" + : "=&d" (addr), "=m" (idle->idle_enter) + : "a" (&psw), "a" (&idle->idle_enter), "m" (psw) + : "memory", "cc"); +#else /* __s390x__ */ + asm volatile( + " larl %0,1f\n" + " stg %0,8(%2)\n" + " stck 0(%3)\n" + " lpswe 0(%2)\n" + "1:" + : "=&d" (addr), "=m" (idle->idle_enter) + : "a" (&psw), "a" (&idle->idle_enter), "m" (psw) + : "memory", "cc"); +#endif /* __s390x__ */ start_critical_timings(); } diff --git a/arch/s390/kernel/s390_ext.c b/arch/s390/kernel/s390_ext.c index e019b419efc6..a0d2d55d7fb3 100644 --- a/arch/s390/kernel/s390_ext.c +++ b/arch/s390/kernel/s390_ext.c @@ -119,8 +119,8 @@ void do_extint(struct pt_regs *regs, unsigned short code) struct pt_regs *old_regs; old_regs = set_irq_regs(regs); - irq_enter(); s390_idle_check(); + irq_enter(); if (S390_lowcore.int_clock >= S390_lowcore.clock_comparator) /* Serve timer interrupts first. */ clock_comparator_work(); diff --git a/arch/s390/kernel/smp.c b/arch/s390/kernel/smp.c index e26c2782c775..179732fca7ee 100644 --- a/arch/s390/kernel/smp.c +++ b/arch/s390/kernel/smp.c @@ -850,9 +850,11 @@ static ssize_t show_idle_count(struct sys_device *dev, unsigned long long idle_count; idle = &per_cpu(s390_idle, dev->id); - spin_lock_irq(&idle->lock); + spin_lock(&idle->lock); idle_count = idle->idle_count; - spin_unlock_irq(&idle->lock); + if (idle->idle_enter) + idle_count++; + spin_unlock(&idle->lock); return sprintf(buf, "%llu\n", idle_count); } static SYSDEV_ATTR(idle_count, 0444, show_idle_count, NULL); @@ -861,18 +863,17 @@ static ssize_t show_idle_time(struct sys_device *dev, struct sysdev_attribute *attr, char *buf) { struct s390_idle_data *idle; - unsigned long long new_time; + unsigned long long now, idle_time, idle_enter; idle = &per_cpu(s390_idle, dev->id); - spin_lock_irq(&idle->lock); - if (idle->in_idle) { - new_time = get_clock(); - idle->idle_time += new_time - idle->idle_enter; - idle->idle_enter = new_time; - } - new_time = idle->idle_time; - spin_unlock_irq(&idle->lock); - return sprintf(buf, "%llu\n", new_time >> 12); + spin_lock(&idle->lock); + now = get_clock(); + idle_time = idle->idle_time; + idle_enter = idle->idle_enter; + if (idle_enter != 0ULL && idle_enter < now) + idle_time += now - idle_enter; + spin_unlock(&idle->lock); + return sprintf(buf, "%llu\n", idle_time >> 12); } static SYSDEV_ATTR(idle_time_us, 0444, show_idle_time, NULL); diff --git a/arch/s390/kernel/vtime.c b/arch/s390/kernel/vtime.c index 0fa5dc5d68e1..bda56ef4a014 100644 --- a/arch/s390/kernel/vtime.c +++ b/arch/s390/kernel/vtime.c @@ -51,18 +51,18 @@ void account_process_tick(struct task_struct *tsk, int user_tick) rcu_user_flag = cputime != 0; S390_lowcore.user_timer -= cputime << 12; S390_lowcore.steal_clock -= cputime << 12; - account_user_time(tsk, cputime); + account_user_time(tsk, cputime, cputime); cputime = S390_lowcore.system_timer >> 12; S390_lowcore.system_timer -= cputime << 12; S390_lowcore.steal_clock -= cputime << 12; - account_system_time(tsk, HARDIRQ_OFFSET, cputime); + account_system_time(tsk, HARDIRQ_OFFSET, cputime, cputime); cputime = S390_lowcore.steal_clock; if ((__s64) cputime > 0) { cputime >>= 12; S390_lowcore.steal_clock -= cputime << 12; - account_steal_time(tsk, cputime); + account_steal_time(cputime); } } @@ -83,12 +83,12 @@ void account_vtime(struct task_struct *tsk) cputime = S390_lowcore.user_timer >> 12; S390_lowcore.user_timer -= cputime << 12; S390_lowcore.steal_clock -= cputime << 12; - account_user_time(tsk, cputime); + account_user_time(tsk, cputime, cputime); cputime = S390_lowcore.system_timer >> 12; S390_lowcore.system_timer -= cputime << 12; S390_lowcore.steal_clock -= cputime << 12; - account_system_time(tsk, 0, cputime); + account_system_time(tsk, 0, cputime, cputime); } /* @@ -108,7 +108,7 @@ void account_system_vtime(struct task_struct *tsk) cputime = S390_lowcore.system_timer >> 12; S390_lowcore.system_timer -= cputime << 12; S390_lowcore.steal_clock -= cputime << 12; - account_system_time(tsk, 0, cputime); + account_system_time(tsk, 0, cputime, cputime); } EXPORT_SYMBOL_GPL(account_system_vtime); @@ -146,8 +146,8 @@ void vtime_start_cpu_timer(void) if (vt_list->idle & 1LL<<63) return; - if (!list_empty(&vt_list->list)) - set_vtimer(vt_list->idle); + S390_lowcore.last_update_timer = S390_lowcore.async_enter_timer; + set_vtimer(vt_list->idle); } void vtime_stop_cpu_timer(void) diff --git a/arch/x86/xen/time.c b/arch/x86/xen/time.c index 65d75a6be0ba..14f240623497 100644 --- a/arch/x86/xen/time.c +++ b/arch/x86/xen/time.c @@ -132,8 +132,7 @@ static void do_stolen_accounting(void) *snap = state; /* Add the appropriate number of ticks of stolen time, - including any left-overs from last time. Passing NULL to - account_steal_time accounts the time as stolen. */ + including any left-overs from last time. */ stolen = runnable + offline + __get_cpu_var(residual_stolen); if (stolen < 0) @@ -141,11 +140,10 @@ static void do_stolen_accounting(void) ticks = iter_div_u64_rem(stolen, NS_PER_TICK, &stolen); __get_cpu_var(residual_stolen) = stolen; - account_steal_time(NULL, ticks); + account_steal_ticks(ticks); /* Add the appropriate number of ticks of blocked time, - including any left-overs from last time. Passing idle to - account_steal_time accounts the time as idle/wait. */ + including any left-overs from last time. */ blocked += __get_cpu_var(residual_blocked); if (blocked < 0) @@ -153,7 +151,7 @@ static void do_stolen_accounting(void) ticks = iter_div_u64_rem(blocked, NS_PER_TICK, &blocked); __get_cpu_var(residual_blocked) = blocked; - account_steal_time(idle_task(smp_processor_id()), ticks); + account_idle_ticks(ticks); } /* |