From fae8b22d3e3e3a3d317a7746493997af02a3f35c Mon Sep 17 00:00:00 2001 From: Heiko Carstens Date: Mon, 22 Oct 2007 12:52:39 +0200 Subject: [S390] Add per-cpu idle time / idle count sysfs attributes. 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 Signed-off-by: Heiko Carstens Signed-off-by: Martin Schwidefsky --- include/asm-s390/cpu.h | 25 +++++++++++++++++++++++++ 1 file changed, 25 insertions(+) create mode 100644 include/asm-s390/cpu.h (limited to 'include/asm-s390') diff --git a/include/asm-s390/cpu.h b/include/asm-s390/cpu.h new file mode 100644 index 0000000..352dde1 --- /dev/null +++ b/include/asm-s390/cpu.h @@ -0,0 +1,25 @@ +/* + * include/asm-s390/cpu.h + * + * Copyright IBM Corp. 2007 + * Author(s): Heiko Carstens + */ + +#ifndef _ASM_S390_CPU_H_ +#define _ASM_S390_CPU_H_ + +#include +#include +#include + +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_ */ -- cgit v1.1