Commit 5e84cfde authored by Laurent Vivier's avatar Laurent Vivier Committed by Ingo Molnar
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sched: guest CPU accounting: add guest-CPU /proc/stat field 



as recent CPUs introduce a third running state, after "user" and
"system", we need a new field, "guest", in cpustat to store the time
used by the CPU to run virtual CPU. Modify /proc/stat to display this
new field.

Signed-off-by: default avatarLaurent Vivier <Laurent.Vivier@bull.net>
Acked-by: default avatarAvi Kivity <avi@qumranet.com>
Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
parent 6323469f

fs/proc/proc_misc.c

+11 −4
Original line number Diff line number Diff line
@@ -443,6 +443,7 @@ static int show_stat(struct seq_file *p, void *v) 
	int i;

	unsigned long jif;

	cputime64_t user, nice, system, idle, iowait, irq, softirq, steal;

	cputime64_t guest;

	u64 sum = 0;

	struct timespec boottime;

	unsigned int *per_irq_sum;
@@ -453,6 +454,7 @@ static int show_stat(struct seq_file *p, void *v) 


	user = nice = system = idle = iowait =

		irq = softirq = steal = cputime64_zero;

	guest = cputime64_zero;

	getboottime(&boottime);

	jif = boottime.tv_sec;
@@ -467,6 +469,7 @@ static int show_stat(struct seq_file *p, void *v) 
		irq = cputime64_add(irq, kstat_cpu(i).cpustat.irq);

		softirq = cputime64_add(softirq, kstat_cpu(i).cpustat.softirq);

		steal = cputime64_add(steal, kstat_cpu(i).cpustat.steal);

		guest = cputime64_add(guest, kstat_cpu(i).cpustat.guest);

		for (j = 0; j < NR_IRQS; j++) {

			unsigned int temp = kstat_cpu(i).irqs[j];

			sum += temp;
@@ -474,7 +477,7 @@ static int show_stat(struct seq_file *p, void *v) 
		}

	}



	seq_printf(p, "cpu  %llu %llu %llu %llu %llu %llu %llu %llu\n",

	seq_printf(p, "cpu  %llu %llu %llu %llu %llu %llu %llu %llu %llu\n",

		(unsigned long long)cputime64_to_clock_t(user),

		(unsigned long long)cputime64_to_clock_t(nice),

		(unsigned long long)cputime64_to_clock_t(system),
@@ -482,7 +485,8 @@ static int show_stat(struct seq_file *p, void *v) 
		(unsigned long long)cputime64_to_clock_t(iowait),

		(unsigned long long)cputime64_to_clock_t(irq),

		(unsigned long long)cputime64_to_clock_t(softirq),

		(unsigned long long)cputime64_to_clock_t(steal));

		(unsigned long long)cputime64_to_clock_t(steal),

		(unsigned long long)cputime64_to_clock_t(guest));

	for_each_online_cpu(i) {



		/* Copy values here to work around gcc-2.95.3, gcc-2.96 */
@@ -494,7 +498,9 @@ static int show_stat(struct seq_file *p, void *v) 
		irq = kstat_cpu(i).cpustat.irq;

		softirq = kstat_cpu(i).cpustat.softirq;

		steal = kstat_cpu(i).cpustat.steal;

		seq_printf(p, "cpu%d %llu %llu %llu %llu %llu %llu %llu %llu\n",

		guest = kstat_cpu(i).cpustat.guest;

		seq_printf(p,

			"cpu%d %llu %llu %llu %llu %llu %llu %llu %llu %llu\n",

			i,

			(unsigned long long)cputime64_to_clock_t(user),

			(unsigned long long)cputime64_to_clock_t(nice),
@@ -503,7 +509,8 @@ static int show_stat(struct seq_file *p, void *v) 
			(unsigned long long)cputime64_to_clock_t(iowait),

			(unsigned long long)cputime64_to_clock_t(irq),

			(unsigned long long)cputime64_to_clock_t(softirq),

			(unsigned long long)cputime64_to_clock_t(steal));

			(unsigned long long)cputime64_to_clock_t(steal),

			(unsigned long long)cputime64_to_clock_t(guest));

	}

	seq_printf(p, "intr %llu", (unsigned long long)sum);

include/linux/kernel_stat.h

+1 −0
Original line number Diff line number Diff line
@@ -23,6 +23,7 @@ struct cpu_usage_stat { 
	cputime64_t idle;

	cputime64_t iowait;

	cputime64_t steal;

	cputime64_t guest;

};



struct kernel_stat {

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