diff options
Diffstat (limited to 'Documentation/ABI/testing/sysfs-devices-system-cpu')
| -rw-r--r-- | Documentation/ABI/testing/sysfs-devices-system-cpu | 63 |
1 files changed, 48 insertions, 15 deletions
diff --git a/Documentation/ABI/testing/sysfs-devices-system-cpu b/Documentation/ABI/testing/sysfs-devices-system-cpu index 2e0e3b45d02a..77caf3ef82d3 100644 --- a/Documentation/ABI/testing/sysfs-devices-system-cpu +++ b/Documentation/ABI/testing/sysfs-devices-system-cpu @@ -106,10 +106,10 @@ Description: CPU topology files that describe a logical CPU's relationship See Documentation/admin-guide/cputopology.rst for more information. -What: /sys/devices/system/cpu/cpuidle/current_driver - /sys/devices/system/cpu/cpuidle/current_governer_ro - /sys/devices/system/cpu/cpuidle/available_governors +What: /sys/devices/system/cpu/cpuidle/available_governors + /sys/devices/system/cpu/cpuidle/current_driver /sys/devices/system/cpu/cpuidle/current_governor + /sys/devices/system/cpu/cpuidle/current_governer_ro Date: September 2007 Contact: Linux kernel mailing list <linux-kernel@vger.kernel.org> Description: Discover cpuidle policy and mechanism @@ -119,24 +119,18 @@ Description: Discover cpuidle policy and mechanism consumption during idle. Idle policy (governor) is differentiated from idle mechanism - (driver) - - current_driver: (RO) displays current idle mechanism - - current_governor_ro: (RO) displays current idle policy - - With the cpuidle_sysfs_switch boot option enabled (meant for - developer testing), the following three attributes are visible - instead: - - current_driver: same as described above + (driver). available_governors: (RO) displays a space separated list of - available governors + available governors. + + current_driver: (RO) displays current idle mechanism. current_governor: (RW) displays current idle policy. Users can switch the governor at runtime by writing to this file. + current_governor_ro: (RO) displays current idle policy. + See Documentation/admin-guide/pm/cpuidle.rst and Documentation/driver-api/pm/cpuidle.rst for more information. @@ -580,3 +574,42 @@ Description: Secure Virtual Machine If 1, it means the system is using the Protected Execution Facility in POWER9 and newer processors. i.e., it is a Secure Virtual Machine. + +What: /sys/devices/system/cpu/cpuX/purr +Date: Apr 2005 +Contact: Linux for PowerPC mailing list <linuxppc-dev@ozlabs.org> +Description: PURR ticks for this CPU since the system boot. + + The Processor Utilization Resources Register (PURR) is + a 64-bit counter which provides an estimate of the + resources used by the CPU thread. The contents of this + register increases monotonically. This sysfs interface + exposes the number of PURR ticks for cpuX. + +What: /sys/devices/system/cpu/cpuX/spurr +Date: Dec 2006 +Contact: Linux for PowerPC mailing list <linuxppc-dev@ozlabs.org> +Description: SPURR ticks for this CPU since the system boot. + + The Scaled Processor Utilization Resources Register + (SPURR) is a 64-bit counter that provides a frequency + invariant estimate of the resources used by the CPU + thread. The contents of this register increases + monotonically. This sysfs interface exposes the number + of SPURR ticks for cpuX. + +What: /sys/devices/system/cpu/cpuX/idle_purr +Date: Apr 2020 +Contact: Linux for PowerPC mailing list <linuxppc-dev@ozlabs.org> +Description: PURR ticks for cpuX when it was idle. + + This sysfs interface exposes the number of PURR ticks + for cpuX when it was idle. + +What: /sys/devices/system/cpu/cpuX/idle_spurr +Date: Apr 2020 +Contact: Linux for PowerPC mailing list <linuxppc-dev@ozlabs.org> +Description: SPURR ticks for cpuX when it was idle. + + This sysfs interface exposes the number of SPURR ticks + for cpuX when it was idle. |