| Message ID | 1585308760-28792-6-git-send-email-ego@linux.vnet.ibm.com (mailing list archive) |
|---|---|
| State | Superseded |
| Headers | show |
| Series | Track and expose idle PURR and SPURR ticks | expand |
| Context | Check | Description |
|---|---|---|
| snowpatch_ozlabs/apply_patch | success | Successfully applied on branch powerpc/merge (c6624071c338732402e8c726df6a4074473eaa0e) |
| snowpatch_ozlabs/checkpatch | success | total: 0 errors, 0 warnings, 0 checks, 42 lines checked |
| snowpatch_ozlabs/needsstable | success | Patch has no Fixes tags |
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
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.