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-rw-r--r--Documentation/ABI/testing/sysfs-devices-system-cpu69
1 files changed, 69 insertions, 0 deletions
diff --git a/Documentation/ABI/testing/sysfs-devices-system-cpu b/Documentation/ABI/testing/sysfs-devices-system-cpu
index b683e8ee69ec..16501334b99f 100644
--- a/Documentation/ABI/testing/sysfs-devices-system-cpu
+++ b/Documentation/ABI/testing/sysfs-devices-system-cpu
@@ -271,3 +271,72 @@ Description: Parameters for the CPU cache attributes
- WriteBack: data is written only to the cache line and
the modified cache line is written to main
memory only when it is replaced
+
+What: /sys/devices/system/cpu/cpuX/cpufreq/throttle_stats
+ /sys/devices/system/cpu/cpuX/cpufreq/throttle_stats/turbo_stat
+ /sys/devices/system/cpu/cpuX/cpufreq/throttle_stats/sub_turbo_stat
+ /sys/devices/system/cpu/cpuX/cpufreq/throttle_stats/unthrottle
+ /sys/devices/system/cpu/cpuX/cpufreq/throttle_stats/powercap
+ /sys/devices/system/cpu/cpuX/cpufreq/throttle_stats/overtemp
+ /sys/devices/system/cpu/cpuX/cpufreq/throttle_stats/supply_fault
+ /sys/devices/system/cpu/cpuX/cpufreq/throttle_stats/overcurrent
+ /sys/devices/system/cpu/cpuX/cpufreq/throttle_stats/occ_reset
+Date: March 2016
+Contact: Linux kernel mailing list <linux-kernel@vger.kernel.org>
+ Linux for PowerPC mailing list <linuxppc-dev@ozlabs.org>
+Description: POWERNV CPUFreq driver's frequency throttle stats directory and
+ attributes
+
+ 'cpuX/cpufreq/throttle_stats' directory contains the CPU frequency
+ throttle stat attributes for the chip. The throttle stats of a cpu
+ is common across all the cpus belonging to a chip. Below are the
+ throttle attributes exported in the 'throttle_stats' directory:
+
+ - turbo_stat : This file gives the total number of times the max
+ frequency is throttled to lower frequency in turbo (at and above
+ nominal frequency) range of frequencies.
+
+ - sub_turbo_stat : This file gives the total number of times the
+ max frequency is throttled to lower frequency in sub-turbo(below
+ nominal frequency) range of frequencies.
+
+ - unthrottle : This file gives the total number of times the max
+ frequency is unthrottled after being throttled.
+
+ - powercap : This file gives the total number of times the max
+ frequency is throttled due to 'Power Capping'.
+
+ - overtemp : This file gives the total number of times the max
+ frequency is throttled due to 'CPU Over Temperature'.
+
+ - supply_fault : This file gives the total number of times the
+ max frequency is throttled due to 'Power Supply Failure'.
+
+ - overcurrent : This file gives the total number of times the
+ max frequency is throttled due to 'Overcurrent'.
+
+ - occ_reset : This file gives the total number of times the max
+ frequency is throttled due to 'OCC Reset'.
+
+ The sysfs attributes representing different throttle reasons like
+ powercap, overtemp, supply_fault, overcurrent and occ_reset map to
+ the reasons provided by OCC firmware for throttling the frequency.
+
+What: /sys/devices/system/cpu/cpufreq/policyX/throttle_stats
+ /sys/devices/system/cpu/cpufreq/policyX/throttle_stats/turbo_stat
+ /sys/devices/system/cpu/cpufreq/policyX/throttle_stats/sub_turbo_stat
+ /sys/devices/system/cpu/cpufreq/policyX/throttle_stats/unthrottle
+ /sys/devices/system/cpu/cpufreq/policyX/throttle_stats/powercap
+ /sys/devices/system/cpu/cpufreq/policyX/throttle_stats/overtemp
+ /sys/devices/system/cpu/cpufreq/policyX/throttle_stats/supply_fault
+ /sys/devices/system/cpu/cpufreq/policyX/throttle_stats/overcurrent
+ /sys/devices/system/cpu/cpufreq/policyX/throttle_stats/occ_reset
+Date: March 2016
+Contact: Linux kernel mailing list <linux-kernel@vger.kernel.org>
+ Linux for PowerPC mailing list <linuxppc-dev@ozlabs.org>
+Description: POWERNV CPUFreq driver's frequency throttle stats directory and
+ attributes
+
+ 'policyX/throttle_stats' directory and all the attributes are same as
+ the /sys/devices/system/cpu/cpuX/cpufreq/throttle_stats directory and
+ attributes which give the frequency throttle information of the chip.