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sched/cputime: Convert kcpustat to nsecs 

Kernel CPU stats are stored in cputime_t which is an architecture
defined type, and hence a bit opaque and requiring accessors and mutators
for any operation.

Converting them to nsecs simplifies the code and is one step toward
the removal of cputime_t in the core code.

Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Tony Luck <tony.luck@intel.com>
Cc: Fenghua Yu <fenghua.yu@intel.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Rik van Riel <riel@redhat.com>
Cc: Stanislaw Gruszka <sgruszka@redhat.com>
Cc: Wanpeng Li <wanpeng.li@hotmail.com>
Link: http://lkml.kernel.org/r/1485832191-26889-4-git-send-email-fweisbec@gmail.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
This commit is contained in:
Frederic Weisbecker 2017-01-31 04:09:19 +01:00 committed by Ingo Molnar
parent ba03ce822d
commit 7fb1327ee9
9 changed files with 61 additions and 65 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

16
arch/s390/appldata/appldata_os.c
View File

@ -113,21 +113,21 @@ static void appldata_get_os_data(void *data)
j = 0;
for_each_online_cpu(i) {
os_data->os_cpu[j].per_cpu_user =
cputime_to_jiffies(kcpustat_cpu(i).cpustat[CPUTIME_USER]);
nsecs_to_jiffies(kcpustat_cpu(i).cpustat[CPUTIME_USER]);
os_data->os_cpu[j].per_cpu_nice =
cputime_to_jiffies(kcpustat_cpu(i).cpustat[CPUTIME_NICE]);
nsecs_to_jiffies(kcpustat_cpu(i).cpustat[CPUTIME_NICE]);
os_data->os_cpu[j].per_cpu_system =
cputime_to_jiffies(kcpustat_cpu(i).cpustat[CPUTIME_SYSTEM]);
nsecs_to_jiffies(kcpustat_cpu(i).cpustat[CPUTIME_SYSTEM]);
os_data->os_cpu[j].per_cpu_idle =
cputime_to_jiffies(kcpustat_cpu(i).cpustat[CPUTIME_IDLE]);
nsecs_to_jiffies(kcpustat_cpu(i).cpustat[CPUTIME_IDLE]);
os_data->os_cpu[j].per_cpu_irq =
cputime_to_jiffies(kcpustat_cpu(i).cpustat[CPUTIME_IRQ]);
nsecs_to_jiffies(kcpustat_cpu(i).cpustat[CPUTIME_IRQ]);
os_data->os_cpu[j].per_cpu_softirq =
cputime_to_jiffies(kcpustat_cpu(i).cpustat[CPUTIME_SOFTIRQ]);
nsecs_to_jiffies(kcpustat_cpu(i).cpustat[CPUTIME_SOFTIRQ]);
os_data->os_cpu[j].per_cpu_iowait =
cputime_to_jiffies(kcpustat_cpu(i).cpustat[CPUTIME_IOWAIT]);
nsecs_to_jiffies(kcpustat_cpu(i).cpustat[CPUTIME_IOWAIT]);
os_data->os_cpu[j].per_cpu_steal =
cputime_to_jiffies(kcpustat_cpu(i).cpustat[CPUTIME_STEAL]);
nsecs_to_jiffies(kcpustat_cpu(i).cpustat[CPUTIME_STEAL]);
os_data->os_cpu[j].cpu_id = i;
j++;
}

6
drivers/cpufreq/cpufreq.c
View File

@ -132,7 +132,7 @@ static inline u64 get_cpu_idle_time_jiffy(unsigned int cpu, u64 *wall)
u64 cur_wall_time;
u64 busy_time;
cur_wall_time = jiffies64_to_cputime64(get_jiffies_64());
cur_wall_time = jiffies64_to_nsecs(get_jiffies_64());
busy_time = kcpustat_cpu(cpu).cpustat[CPUTIME_USER];
busy_time += kcpustat_cpu(cpu).cpustat[CPUTIME_SYSTEM];
@ -143,9 +143,9 @@ static inline u64 get_cpu_idle_time_jiffy(unsigned int cpu, u64 *wall)
idle_time = cur_wall_time - busy_time;
if (wall)
*wall = cputime_to_usecs(cur_wall_time);
*wall = div_u64(cur_wall_time, NSEC_PER_USEC);
return cputime_to_usecs(idle_time);
return div_u64(idle_time, NSEC_PER_USEC);
}
u64 get_cpu_idle_time(unsigned int cpu, u64 *wall, int io_busy)

2
drivers/cpufreq/cpufreq_governor.c
View File

@ -152,7 +152,7 @@ unsigned int dbs_update(struct cpufreq_policy *policy)
if (ignore_nice) {
u64 cur_nice = kcpustat_cpu(j).cpustat[CPUTIME_NICE];
idle_time += cputime_to_usecs(cur_nice - j_cdbs->prev_cpu_nice);
idle_time += div_u64(cur_nice - j_cdbs->prev_cpu_nice, NSEC_PER_USEC);
j_cdbs->prev_cpu_nice = cur_nice;
}

1
drivers/cpufreq/cpufreq_stats.c
View File

@ -13,7 +13,6 @@
#include <linux/cpufreq.h>
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/cputime.h>
static DEFINE_SPINLOCK(cpufreq_stats_lock);

2
drivers/macintosh/rack-meter.c
View File

@ -91,7 +91,7 @@ static inline cputime64_t get_cpu_idle_time(unsigned int cpu)
if (rackmeter_ignore_nice)
retval += kcpustat_cpu(cpu).cpustat[CPUTIME_NICE];
return retval;
return nsecs_to_cputime64(retval);
}
static void rackmeter_setup_i2s(struct rackmeter *rm)

68
fs/proc/stat.c
View File

@ -21,23 +21,23 @@
#ifdef arch_idle_time
static cputime64_t get_idle_time(int cpu)
static u64 get_idle_time(int cpu)
{
cputime64_t idle;
u64 idle;
idle = kcpustat_cpu(cpu).cpustat[CPUTIME_IDLE];
if (cpu_online(cpu) && !nr_iowait_cpu(cpu))
idle += arch_idle_time(cpu);
idle += cputime_to_nsecs(arch_idle_time(cpu));
return idle;
}
static cputime64_t get_iowait_time(int cpu)
static u64 get_iowait_time(int cpu)
{
cputime64_t iowait;
u64 iowait;
iowait = kcpustat_cpu(cpu).cpustat[CPUTIME_IOWAIT];
if (cpu_online(cpu) && nr_iowait_cpu(cpu))
iowait += arch_idle_time(cpu);
iowait += cputime_to_nsecs(arch_idle_time(cpu));
return iowait;
}
@ -45,32 +45,32 @@ static cputime64_t get_iowait_time(int cpu)
static u64 get_idle_time(int cpu)
{
u64 idle, idle_time = -1ULL;
u64 idle, idle_usecs = -1ULL;
if (cpu_online(cpu))
idle_time = get_cpu_idle_time_us(cpu, NULL);
idle_usecs = get_cpu_idle_time_us(cpu, NULL);
if (idle_time == -1ULL)
if (idle_usecs == -1ULL)
/* !NO_HZ or cpu offline so we can rely on cpustat.idle */
idle = kcpustat_cpu(cpu).cpustat[CPUTIME_IDLE];
else
idle = usecs_to_cputime64(idle_time);
idle = idle_usecs * NSEC_PER_USEC;
return idle;
}
static u64 get_iowait_time(int cpu)
{
u64 iowait, iowait_time = -1ULL;
u64 iowait, iowait_usecs = -1ULL;
if (cpu_online(cpu))
iowait_time = get_cpu_iowait_time_us(cpu, NULL);
iowait_usecs = get_cpu_iowait_time_us(cpu, NULL);
if (iowait_time == -1ULL)
if (iowait_usecs == -1ULL)
/* !NO_HZ or cpu offline so we can rely on cpustat.iowait */
iowait = kcpustat_cpu(cpu).cpustat[CPUTIME_IOWAIT];
else
iowait = usecs_to_cputime64(iowait_time);
iowait = iowait_usecs * NSEC_PER_USEC;
return iowait;
}
@ -115,16 +115,16 @@ static int show_stat(struct seq_file *p, void *v)
}
sum += arch_irq_stat();
seq_put_decimal_ull(p, "cpu ", cputime64_to_clock_t(user));
seq_put_decimal_ull(p, " ", cputime64_to_clock_t(nice));
seq_put_decimal_ull(p, " ", cputime64_to_clock_t(system));
seq_put_decimal_ull(p, " ", cputime64_to_clock_t(idle));
seq_put_decimal_ull(p, " ", cputime64_to_clock_t(iowait));
seq_put_decimal_ull(p, " ", cputime64_to_clock_t(irq));
seq_put_decimal_ull(p, " ", cputime64_to_clock_t(softirq));
seq_put_decimal_ull(p, " ", cputime64_to_clock_t(steal));
seq_put_decimal_ull(p, " ", cputime64_to_clock_t(guest));
seq_put_decimal_ull(p, " ", cputime64_to_clock_t(guest_nice));
seq_put_decimal_ull(p, "cpu ", nsec_to_clock_t(user));
seq_put_decimal_ull(p, " ", nsec_to_clock_t(nice));
seq_put_decimal_ull(p, " ", nsec_to_clock_t(system));
seq_put_decimal_ull(p, " ", nsec_to_clock_t(idle));
seq_put_decimal_ull(p, " ", nsec_to_clock_t(iowait));
seq_put_decimal_ull(p, " ", nsec_to_clock_t(irq));
seq_put_decimal_ull(p, " ", nsec_to_clock_t(softirq));
seq_put_decimal_ull(p, " ", nsec_to_clock_t(steal));
seq_put_decimal_ull(p, " ", nsec_to_clock_t(guest));
seq_put_decimal_ull(p, " ", nsec_to_clock_t(guest_nice));
seq_putc(p, '\n');
for_each_online_cpu(i) {
@ -140,16 +140,16 @@ static int show_stat(struct seq_file *p, void *v)
guest = kcpustat_cpu(i).cpustat[CPUTIME_GUEST];
guest_nice = kcpustat_cpu(i).cpustat[CPUTIME_GUEST_NICE];
seq_printf(p, "cpu%d", i);
seq_put_decimal_ull(p, " ", cputime64_to_clock_t(user));
seq_put_decimal_ull(p, " ", cputime64_to_clock_t(nice));
seq_put_decimal_ull(p, " ", cputime64_to_clock_t(system));
seq_put_decimal_ull(p, " ", cputime64_to_clock_t(idle));
seq_put_decimal_ull(p, " ", cputime64_to_clock_t(iowait));
seq_put_decimal_ull(p, " ", cputime64_to_clock_t(irq));
seq_put_decimal_ull(p, " ", cputime64_to_clock_t(softirq));
seq_put_decimal_ull(p, " ", cputime64_to_clock_t(steal));
seq_put_decimal_ull(p, " ", cputime64_to_clock_t(guest));
seq_put_decimal_ull(p, " ", cputime64_to_clock_t(guest_nice));
seq_put_decimal_ull(p, " ", nsec_to_clock_t(user));
seq_put_decimal_ull(p, " ", nsec_to_clock_t(nice));
seq_put_decimal_ull(p, " ", nsec_to_clock_t(system));
seq_put_decimal_ull(p, " ", nsec_to_clock_t(idle));
seq_put_decimal_ull(p, " ", nsec_to_clock_t(iowait));
seq_put_decimal_ull(p, " ", nsec_to_clock_t(irq));
seq_put_decimal_ull(p, " ", nsec_to_clock_t(softirq));
seq_put_decimal_ull(p, " ", nsec_to_clock_t(steal));
seq_put_decimal_ull(p, " ", nsec_to_clock_t(guest));
seq_put_decimal_ull(p, " ", nsec_to_clock_t(guest_nice));
seq_putc(p, '\n');
}
seq_put_decimal_ull(p, "intr ", (unsigned long long)sum);

7
fs/proc/uptime.c
View File

@ -5,23 +5,20 @@
#include <linux/seq_file.h>
#include <linux/time.h>
#include <linux/kernel_stat.h>
#include <linux/cputime.h>
static int uptime_proc_show(struct seq_file *m, void *v)
{
struct timespec uptime;
struct timespec idle;
u64 idletime;
u64 nsec;
u32 rem;
int i;
idletime = 0;
nsec = 0;
for_each_possible_cpu(i)
idletime += (__force u64) kcpustat_cpu(i).cpustat[CPUTIME_IDLE];
nsec += (__force u64) kcpustat_cpu(i).cpustat[CPUTIME_IDLE];
get_monotonic_boottime(&uptime);
nsec = cputime64_to_jiffies64(idletime) * TICK_NSEC;
idle.tv_sec = div_u64_rem(nsec, NSEC_PER_SEC, &rem);
idle.tv_nsec = rem;
seq_printf(m, "%lu.%02lu %lu.%02lu\n",

2
kernel/sched/cpuacct.c
View File

@ -297,7 +297,7 @@ static int cpuacct_stats_show(struct seq_file *sf, void *v)
for (stat = 0; stat < CPUACCT_STAT_NSTATS; stat++) {
seq_printf(sf, "%s %lld\n",
cpuacct_stat_desc[stat],
(long long)cputime64_to_clock_t(val[stat]));
(long long)nsec_to_clock_t(val[stat]));
}
return 0;

22
kernel/sched/cputime.c
View File

@ -75,9 +75,9 @@ static cputime_t irqtime_account_update(u64 irqtime, int idx, cputime_t maxtime)
u64 *cpustat = kcpustat_this_cpu->cpustat;
cputime_t irq_cputime;
irq_cputime = nsecs_to_cputime64(irqtime) - cpustat[idx];
irq_cputime = nsecs_to_cputime64(irqtime - cpustat[idx]);
irq_cputime = min(irq_cputime, maxtime);
cpustat[idx] += irq_cputime;
cpustat[idx] += cputime_to_nsecs(irq_cputime);
return irq_cputime;
}
@ -140,7 +140,7 @@ void account_user_time(struct task_struct *p, cputime_t cputime)
index = (task_nice(p) > 0) ? CPUTIME_NICE : CPUTIME_USER;
/* Add user time to cpustat. */
task_group_account_field(p, index, (__force u64) cputime);
task_group_account_field(p, index, cputime_to_nsecs(cputime));
/* Account for user time used */
acct_account_cputime(p);
@ -162,11 +162,11 @@ void account_guest_time(struct task_struct *p, cputime_t cputime)
/* Add guest time to cpustat. */
if (task_nice(p) > 0) {
cpustat[CPUTIME_NICE] += (__force u64) cputime;
cpustat[CPUTIME_GUEST_NICE] += (__force u64) cputime;
cpustat[CPUTIME_NICE] += cputime_to_nsecs(cputime);
cpustat[CPUTIME_GUEST_NICE] += cputime_to_nsecs(cputime);
} else {
cpustat[CPUTIME_USER] += (__force u64) cputime;
cpustat[CPUTIME_GUEST] += (__force u64) cputime;
cpustat[CPUTIME_USER] += cputime_to_nsecs(cputime);
cpustat[CPUTIME_GUEST] += cputime_to_nsecs(cputime);
}
}
@ -184,7 +184,7 @@ void account_system_index_time(struct task_struct *p,
account_group_system_time(p, cputime);
/* Add system time to cpustat. */
task_group_account_field(p, index, (__force u64) cputime);
task_group_account_field(p, index, cputime_to_nsecs(cputime));
/* Account for system time used */
acct_account_cputime(p);
@ -224,7 +224,7 @@ void account_steal_time(cputime_t cputime)
{
u64 *cpustat = kcpustat_this_cpu->cpustat;
cpustat[CPUTIME_STEAL] += (__force u64) cputime;
cpustat[CPUTIME_STEAL] += cputime_to_nsecs(cputime);
}
/*
@ -237,9 +237,9 @@ void account_idle_time(cputime_t cputime)
struct rq *rq = this_rq();
if (atomic_read(&rq->nr_iowait) > 0)
cpustat[CPUTIME_IOWAIT] += (__force u64) cputime;
cpustat[CPUTIME_IOWAIT] += cputime_to_nsecs(cputime);
else
cpustat[CPUTIME_IDLE] += (__force u64) cputime;
cpustat[CPUTIME_IDLE] += cputime_to_nsecs(cputime);
}
/*