From: Konstantin Khorenko <khore...@virtuozzo.com>
Signed-off-by: Konstantin Khorenko <khore...@virtuozzo.com>
Reviewed-by: Andrey Ryabinin <aryabi...@virtuozzo.com>
(cherry-picked from vz8 commit 93bea3d83126 ("kernel/stat: Introduce
kernel_cpustat operation wrappers"))
Signed-off-by: Nikita Yushchenko <nikita.yushche...@virtuozzo.com>
---
include/linux/kernel_stat.h | 36 ++++++++++++++++++++++++++++++++++++
1 file changed, 36 insertions(+)
diff --git a/include/linux/kernel_stat.h b/include/linux/kernel_stat.h
index 44ae1a7eb9e3..fb6149076cc5 100644
--- a/include/linux/kernel_stat.h
+++ b/include/linux/kernel_stat.h
@@ -35,6 +35,42 @@ struct kernel_cpustat {
u64 cpustat[NR_STATS];
};
+static inline u64 kernel_cpustat_total_usage(const struct kernel_cpustat *p)
+{
+ return p->cpustat[CPUTIME_USER] + p->cpustat[CPUTIME_NICE] +
+ p->cpustat[CPUTIME_SYSTEM];
+}
+
+static inline u64 kernel_cpustat_total_idle(const struct kernel_cpustat *p)
+{
+ return p->cpustat[CPUTIME_IDLE] + p->cpustat[CPUTIME_IOWAIT];
+}
+
+static inline void kernel_cpustat_zero(struct kernel_cpustat *p)
+{
+ memset(p, 0, sizeof(*p));
+}
+
+static inline void kernel_cpustat_add(const struct kernel_cpustat *lhs,
+ const struct kernel_cpustat *rhs,
+ struct kernel_cpustat *res)
+{
+ int i;
+
+ for (i = 0; i < NR_STATS; i++)
+ res->cpustat[i] = lhs->cpustat[i] + rhs->cpustat[i];
+}
+
+static inline void kernel_cpustat_sub(const struct kernel_cpustat *lhs,
+ const struct kernel_cpustat *rhs,
+ struct kernel_cpustat *res)
+{
+ int i;
+
+ for (i = 0; i < NR_STATS; i++)
+ res->cpustat[i] = lhs->cpustat[i] - rhs->cpustat[i];
+}
+
struct kernel_stat {
unsigned long irqs_sum;
unsigned int softirqs[NR_SOFTIRQS];
--
2.30.2
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