Messages in this thread | | | Date | Wed, 01 Apr 2020 15:15:57 +0530 | From | "Naveen N. Rao" <> | Subject | Re: [PATCH v4 5/6] Documentation: Document sysfs interfaces purr, spurr, idle_purr, idle_spurr |
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Gautham R. Shenoy wrote: > From: "Gautham R. Shenoy" <ego@linux.vnet.ibm.com> > > 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 <ego@linux.vnet.ibm.com> > --- > 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 <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: Mar 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: Mar 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.
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 <naveen.n.rao@linux.vnet.ibm.com>
- Naveen
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