mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-10-30 16:07:39 +00:00
fae8b22d3e
Add two new sysfs entries per cpu: idle_count and idle_time. idle_count contains the number of times a cpu went into idle state. idle_time contains the time a cpu spent in idle state in microseconds. This can be used e.g. by powertop to tell how often idle state is entered and left. # cat /sys/devices/system/cpu/cpu0/idle_count 504 # cat /sys/devices/system/cpu/cpu0/idle_time 469734037 us Cc: Arjan van de Ven <arjan@infradead.org> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
25 lines
506 B
C
25 lines
506 B
C
/*
|
|
* include/asm-s390/cpu.h
|
|
*
|
|
* Copyright IBM Corp. 2007
|
|
* Author(s): Heiko Carstens <heiko.carstens@de.ibm.com>
|
|
*/
|
|
|
|
#ifndef _ASM_S390_CPU_H_
|
|
#define _ASM_S390_CPU_H_
|
|
|
|
#include <linux/types.h>
|
|
#include <linux/percpu.h>
|
|
#include <linux/spinlock.h>
|
|
|
|
struct s390_idle_data {
|
|
spinlock_t lock;
|
|
unsigned int in_idle;
|
|
unsigned long long idle_count;
|
|
unsigned long long idle_enter;
|
|
unsigned long long idle_time;
|
|
};
|
|
|
|
DECLARE_PER_CPU(struct s390_idle_data, s390_idle);
|
|
|
|
#endif /* _ASM_S390_CPU_H_ */
|