From: "Gautham R. Shenoy" <[email protected]>
Add documentation for the following sysfs interfaces:
/sys/devices/system/cpu/cpuX/purr
/sys/devices/system/cpu/cpuX/spurr
/sys/devices/system/cpu/cpuX/idle_purr
/sys/devices/system/cpu/cpuX/idle_spurr
Signed-off-by: Gautham R. Shenoy <[email protected]>
---
Documentation/ABI/testing/sysfs-devices-system-cpu | 39 ++++++++++++++++++++++
1 file changed, 39 insertions(+)
diff --git a/Documentation/ABI/testing/sysfs-devices-system-cpu b/Documentation/ABI/testing/sysfs-devices-system-cpu
index 2e0e3b4..bc07677 100644
--- a/Documentation/ABI/testing/sysfs-devices-system-cpu
+++ b/Documentation/ABI/testing/sysfs-devices-system-cpu
@@ -580,3 +580,42 @@ 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 <[email protected]>
+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 <[email protected]>
+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: Mar 2020
+Contact: Linux for PowerPC mailing list <[email protected]>
+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: Mar 2020
+Contact: Linux for PowerPC mailing list <[email protected]>
+Description: SPURR ticks for cpuX when it was idle.
+
+ This sysfs interface exposes the number of SPURR ticks
+ for cpuX when it was idle.
--
1.9.4
Gautham R. Shenoy wrote:
> From: "Gautham R. Shenoy" <[email protected]>
>
> Add documentation for the following sysfs interfaces:
> /sys/devices/system/cpu/cpuX/purr
> /sys/devices/system/cpu/cpuX/spurr
> /sys/devices/system/cpu/cpuX/idle_purr
> /sys/devices/system/cpu/cpuX/idle_spurr
>
> Signed-off-by: Gautham R. Shenoy <[email protected]>
> ---
> Documentation/ABI/testing/sysfs-devices-system-cpu | 39 ++++++++++++++++++++++
> 1 file changed, 39 insertions(+)
>
> diff --git a/Documentation/ABI/testing/sysfs-devices-system-cpu b/Documentation/ABI/testing/sysfs-devices-system-cpu
> index 2e0e3b4..bc07677 100644
> --- a/Documentation/ABI/testing/sysfs-devices-system-cpu
> +++ b/Documentation/ABI/testing/sysfs-devices-system-cpu
> @@ -580,3 +580,42 @@ 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 <[email protected]>
> +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 <[email protected]>
> +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: Mar 2020
> +Contact: Linux for PowerPC mailing list <[email protected]>
> +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: Mar 2020
> +Contact: Linux for PowerPC mailing list <[email protected]>
> +Description: SPURR ticks for cpuX when it was idle.
> +
> + This sysfs interface exposes the number of SPURR ticks
> + for cpuX when it was idle.
Apart from the minor comment on patches 2 and 3, from the sysfs
interface standpoint, for patches 1 to 5:
Acked-by: Naveen N. Rao <[email protected]>
- Naveen