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: Laurent Vivier <Laurent.Vivier@bull.net>
Acked-by: Avi Kivity <avi@qumranet.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

diff --git a/fs/proc/proc_misc.c b/fs/proc/proc_misc.c
index bee251cb87c8c42c3d051ec2ea53df209e422c52..b872a01ad3af09a335eb7da19818aa533550486e 100644 (file)
--- a/fs/proc/proc_misc.c
+++ b/fs/proc/proc_misc.c
@@ -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);
 

diff --git a/include/linux/kernel_stat.h b/include/linux/kernel_stat.h
index 43e895f1cabef24137e213958eeef48bde70ff28..12bf44f083f53355ca785a663bd76422dafcdfc1 100644 (file)
--- a/include/linux/kernel_stat.h
+++ b/include/linux/kernel_stat.h
@@ -23,6 +23,7 @@ struct cpu_usage_stat {
        cputime64_t idle;
        cputime64_t iowait;
        cputime64_t steal;
+       cputime64_t guest;
 };
 
 struct kernel_stat {