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..799dc737a 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: Nov 2019
+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/spurr
+Date: Nov 2019
+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" <[email protected]> writes:
> diff --git a/Documentation/ABI/testing/sysfs-devices-system-cpu b/Documentation/ABI/testing/sysfs-devices-system-cpu
> index 2e0e3b4..799dc737a 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: Nov 2019
> +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/spurr
Copy-paste error? This should be:
/sys/devices/system/cpu/cpuX/idle_spurr
> +Date: Nov 2019
And I suppose Nov 2019 is no longer accurate.
> +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
On Fri, Feb 21, 2020 at 10:55:07AM -0600, Nathan Lynch wrote:
> "Gautham R. Shenoy" <[email protected]> writes:
> > diff --git a/Documentation/ABI/testing/sysfs-devices-system-cpu b/Documentation/ABI/testing/sysfs-devices-system-cpu
> > index 2e0e3b4..799dc737a 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: Nov 2019
> > +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/spurr
>
> Copy-paste error? This should be:
Yes, this should have been idle_spurr. Will fix it in the next
version.
>
> /sys/devices/system/cpu/cpuX/idle_spurr
>
> > +Date: Nov 2019
>
> And I suppose Nov 2019 is no longer accurate.
My bad. I will resend this with the updated date.
>
>
> > +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