tree 871aa91c51d713d7842ba1eb8661bde54d102842
parent 32346f47dd46bed291464e194a6c47da6fdd1bc3
author Heiko Carstens <heiko.carstens@de.ibm.com> 1193050359 +0200
committer Martin Schwidefsky <schwidefsky@de.ibm.com> 1193050367 +0200

[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 <arjan@infradead.org>
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>