Commit 39d2edc4 authored by Doug Ledford's avatar Doug Ledford

Add irq and softirq time accounting to the kernel

parent a1ad3d82
......@@ -362,7 +362,7 @@ static int kstat_read_proc(char *page, char **start, off_t off,
int i, len;
extern unsigned long total_forks;
u64 jif;
unsigned int sum = 0, user = 0, nice = 0, system = 0, idle = 0, iowait = 0;
unsigned int sum = 0, user = 0, nice = 0, system = 0, idle = 0, iowait = 0, irq = 0, softirq = 0;
struct timeval now;
unsigned long seq;
......@@ -388,25 +388,31 @@ static int kstat_read_proc(char *page, char **start, off_t off,
system += kstat_cpu(i).cpustat.system;
idle += kstat_cpu(i).cpustat.idle;
iowait += kstat_cpu(i).cpustat.iowait;
irq += kstat_cpu(i).cpustat.irq;
softirq += kstat_cpu(i).cpustat.softirq;
for (j = 0 ; j < NR_IRQS ; j++)
sum += kstat_cpu(i).irqs[j];
}
len = sprintf(page, "cpu %u %u %u %u %u\n",
len = sprintf(page, "cpu %u %u %u %u %u %u %u\n",
jiffies_to_clock_t(user),
jiffies_to_clock_t(nice),
jiffies_to_clock_t(system),
jiffies_to_clock_t(idle),
jiffies_to_clock_t(iowait));
jiffies_to_clock_t(iowait),
jiffies_to_clock_t(irq),
jiffies_to_clock_t(softirq));
for (i = 0 ; i < NR_CPUS; i++){
if (!cpu_online(i)) continue;
len += sprintf(page + len, "cpu%d %u %u %u %u %u\n",
len += sprintf(page + len, "cpu%d %u %u %u %u %u %u %u\n",
i,
jiffies_to_clock_t(kstat_cpu(i).cpustat.user),
jiffies_to_clock_t(kstat_cpu(i).cpustat.nice),
jiffies_to_clock_t(kstat_cpu(i).cpustat.system),
jiffies_to_clock_t(kstat_cpu(i).cpustat.idle),
jiffies_to_clock_t(kstat_cpu(i).cpustat.iowait));
jiffies_to_clock_t(kstat_cpu(i).cpustat.iowait),
jiffies_to_clock_t(kstat_cpu(i).cpustat.irq),
jiffies_to_clock_t(kstat_cpu(i).cpustat.softirq));
}
len += sprintf(page + len, "intr %u", sum);
......
......@@ -17,6 +17,8 @@ struct cpu_usage_stat {
unsigned int user;
unsigned int nice;
unsigned int system;
unsigned int softirq;
unsigned int irq;
unsigned int idle;
unsigned int iowait;
};
......
......@@ -1201,11 +1201,17 @@ void scheduler_tick(int user_ticks, int sys_ticks)
if (rcu_pending(cpu))
rcu_check_callbacks(cpu, user_ticks);
if (p == rq->idle) {
/* note: this timer irq context must be accounted for as well */
if (irq_count() - HARDIRQ_OFFSET >= SOFTIRQ_OFFSET)
cpustat->system += sys_ticks;
else if (atomic_read(&rq->nr_iowait) > 0)
if (hardirq_count() - HARDIRQ_OFFSET) {
cpustat->irq += sys_ticks;
sys_ticks = 0;
} else if (softirq_count()) {
cpustat->softirq += sys_ticks;
sys_ticks = 0;
}
if (p == rq->idle) {
if (atomic_read(&rq->nr_iowait) > 0)
cpustat->iowait += sys_ticks;
else
cpustat->idle += sys_ticks;
......
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