1 files changed, 59 insertions, 0 deletions

diff --git a/include/linux/kernel_stat.h b/include/linux/kernel_stat.h
new file mode 100644
index 0000000000..dba27749b4
--- /dev/null
+++ b/include/linux/kernel_stat.h
@@ -0,0 +1,59 @@
+#ifndef _LINUX_KERNEL_STAT_H
+#define _LINUX_KERNEL_STAT_H
+
+#include <linux/config.h>
+#include <asm/irq.h>
+#include <linux/smp.h>
+#include <linux/threads.h>
+#include <linux/percpu.h>
+#include <asm/cputime.h>
+
+/*
+ * 'kernel_stat.h' contains the definitions needed for doing
+ * some kernel statistics (CPU usage, context switches ...),
+ * used by rstatd/perfmeter
+ */
+
+struct cpu_usage_stat {
+        cputime64_t user;
+        cputime64_t nice;
+        cputime64_t system;
+        cputime64_t softirq;
+        cputime64_t irq;
+        cputime64_t idle;
+        cputime64_t iowait;
+        cputime64_t steal;
+};
+
+struct kernel_stat {
+        struct cpu_usage_stat   cpustat;
+        unsigned int irqs[NR_IRQS];
+};
+
+DECLARE_PER_CPU(struct kernel_stat, kstat);
+
+#define kstat_cpu(cpu)  per_cpu(kstat, cpu)
+/* Must have preemption disabled for this to be meaningful. */
+#define kstat_this_cpu  __get_cpu_var(kstat)
+
+extern unsigned long long nr_context_switches(void);
+
+/*
+ * Number of interrupts per specific IRQ source, since bootup
+ */
+static inline int kstat_irqs(int irq)
+{
+        int i, sum=0;
+
+        for (i = 0; i < NR_CPUS; i++)
+                if (cpu_possible(i))
+                        sum += kstat_cpu(i).irqs[irq];
+
+        return sum;
+}
+
+extern void account_user_time(struct task_struct *, cputime_t);
+extern void account_system_time(struct task_struct *, int, cputime_t);
+extern void account_steal_time(struct task_struct *, cputime_t);
+
+#endif /* _LINUX_KERNEL_STAT_H */