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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>
26 lines
506 B
C
26 lines
506 B
C
/*
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* include/asm-s390/cpu.h
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*
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* Copyright IBM Corp. 2007
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* Author(s): Heiko Carstens <heiko.carstens@de.ibm.com>
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*/
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#ifndef _ASM_S390_CPU_H_
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#define _ASM_S390_CPU_H_
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#include <linux/types.h>
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#include <linux/percpu.h>
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#include <linux/spinlock.h>
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struct s390_idle_data {
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spinlock_t lock;
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unsigned int in_idle;
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unsigned long long idle_count;
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unsigned long long idle_enter;
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unsigned long long idle_time;
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};
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DECLARE_PER_CPU(struct s390_idle_data, s390_idle);
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#endif /* _ASM_S390_CPU_H_ */
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