[PATCH 1/4] 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 <[email protected]>
--
------------- [email protected] --------------
"Software is hard" - Donald Knuth
Index: linux-2.6/fs/proc/proc_misc.c
===================================================================
--- linux-2.6.orig/fs/proc/proc_misc.c 2007-09-10 12:58:31.000000000 +0200
+++ linux-2.6/fs/proc/proc_misc.c 2007-09-10 12:58:37.000000000 +0200
@@ -443,6 +443,9 @@ static int show_stat(struct seq_file *p,
int i;
unsigned long jif;
cputime64_t user, nice, system, idle, iowait, irq, softirq, steal;
+#ifdef CONFIG_GUEST_ACCOUNTING
+ cputime64_t guest;
+#endif
u64 sum = 0;
struct timespec boottime;
unsigned int *per_irq_sum;
@@ -453,6 +456,9 @@ static int show_stat(struct seq_file *p,
user = nice = system = idle = iowait =
irq = softirq = steal = cputime64_zero;
+#ifdef CONFIG_GUEST_ACCOUNTING
+ guest = cputime64_zero;
+#endif
getboottime(&boottime);
jif = boottime.tv_sec;
@@ -467,6 +473,9 @@ static int show_stat(struct seq_file *p,
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);
+#ifdef CONFIG_GUEST_ACCOUNTING
+ guest = cputime64_add(guest, kstat_cpu(i).cpustat.guest);
+#endif
for (j = 0; j < NR_IRQS; j++) {
unsigned int temp = kstat_cpu(i).irqs[j];
sum += temp;
@@ -474,6 +483,18 @@ static int show_stat(struct seq_file *p,
}
}
+#ifdef CONFIG_GUEST_ACCOUNTING
+ 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),
+ (unsigned long long)cputime64_to_clock_t(idle),
+ (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(guest));
+#else
seq_printf(p, "cpu %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),
@@ -483,6 +504,7 @@ static int show_stat(struct seq_file *p,
(unsigned long long)cputime64_to_clock_t(irq),
(unsigned long long)cputime64_to_clock_t(softirq),
(unsigned long long)cputime64_to_clock_t(steal));
+#endif
for_each_online_cpu(i) {
/* Copy values here to work around gcc-2.95.3, gcc-2.96 */
@@ -494,6 +516,21 @@ static int show_stat(struct seq_file *p,
irq = kstat_cpu(i).cpustat.irq;
softirq = kstat_cpu(i).cpustat.softirq;
steal = kstat_cpu(i).cpustat.steal;
+#ifdef CONFIG_GUEST_ACCOUNTING
+ 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),
+ (unsigned long long)cputime64_to_clock_t(system),
+ (unsigned long long)cputime64_to_clock_t(idle),
+ (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(guest));
+#else
seq_printf(p, "cpu%d %llu %llu %llu %llu %llu %llu %llu %llu\n",
i,
(unsigned long long)cputime64_to_clock_t(user),
@@ -504,6 +541,7 @@ static int show_stat(struct seq_file *p,
(unsigned long long)cputime64_to_clock_t(irq),
(unsigned long long)cputime64_to_clock_t(softirq),
(unsigned long long)cputime64_to_clock_t(steal));
+#endif
}
seq_printf(p, "intr %llu", (unsigned long long)sum);
Index: linux-2.6/include/linux/kernel_stat.h
===================================================================
--- linux-2.6.orig/include/linux/kernel_stat.h 2007-09-10 12:58:31.000000000 +0200
+++ linux-2.6/include/linux/kernel_stat.h 2007-09-10 12:58:37.000000000 +0200
@@ -23,6 +23,9 @@ struct cpu_usage_stat {
cputime64_t idle;
cputime64_t iowait;
cputime64_t steal;
+#ifdef CONFIG_GUEST_ACCOUNTING
+ cputime64_t guest;
+#endif
};
struct kernel_stat {
Index: linux-2.6/init/Kconfig
===================================================================
--- linux-2.6.orig/init/Kconfig 2007-09-10 12:58:31.000000000 +0200
+++ linux-2.6/init/Kconfig 2007-09-10 12:58:37.000000000 +0200
@@ -164,6 +164,10 @@ config BSD_PROCESS_ACCT_V3
for processing it. A preliminary version of these tools is available
at <http://www.physik3.uni-rostock.de/tim/kernel/utils/acct/>.
+config GUEST_ACCOUNTING
+ bool
+ default n
+
config TASKSTATS
bool "Export task/process statistics through netlink (EXPERIMENTAL)"
depends on NET
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