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From: "Gautham R. Shenoy" <ego@linux.vnet.ibm.com>
To: Nathan Lynch <nathanl@linux.ibm.com>,
	Michael Ellerman <mpe@ellerman.id.au>,
	Vaidyanathan Srinivasan <svaidy@linux.vnet.ibm.com>,
	Kamalesh Babulal <kamalesh@linux.vnet.ibm.com>,
	"Naveen N. Rao" <naveen.n.rao@linux.vnet.ibm.com>,
	Tyrel Datwyler <tyreld@linux.ibm.com>
Cc: linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org,
	"Gautham R. Shenoy" <ego@linux.vnet.ibm.com>
Subject: [PATCH v4 5/6] Documentation: Document sysfs interfaces purr, spurr, idle_purr, idle_spurr
Date: Fri, 27 Mar 2020 17:02:39 +0530	[thread overview]
Message-ID: <1585308760-28792-6-git-send-email-ego@linux.vnet.ibm.com> (raw)
In-Reply-To: <1585308760-28792-1-git-send-email-ego@linux.vnet.ibm.com>

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.
-- 
1.9.4


  parent reply	other threads:[~2020-03-27 11:33 UTC|newest]

Thread overview: 17+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-03-27 11:32 [PATCH v4 0/6] [PATCH v4 0/6] Track and expose idle PURR and SPURR ticks Gautham R. Shenoy
2020-03-27 11:32 ` [PATCH v4 1/6] powerpc: Move idle_loop_prolog()/epilog() functions to header file Gautham R. Shenoy
2020-03-27 11:32 ` [PATCH v4 2/6] powerpc/idle: Add accessor function to always read latest idle PURR Gautham R. Shenoy
2020-04-01  9:42   ` Naveen N. Rao
2020-04-03  6:15     ` Gautham R Shenoy
2020-04-03 10:34       ` Naveen N. Rao
2020-04-03 11:24         ` Gautham R Shenoy
2020-03-27 11:32 ` [PATCH v4 3/6] powerpc/pseries: Account for SPURR ticks on idle CPUs Gautham R. Shenoy
2020-03-27 11:32 ` [PATCH v4 4/6] powerpc/sysfs: Show idle_purr and idle_spurr for every CPU Gautham R. Shenoy
2020-03-27 11:32 ` Gautham R. Shenoy [this message]
2020-04-01  9:45   ` [PATCH v4 5/6] Documentation: Document sysfs interfaces purr, spurr, idle_purr, idle_spurr Naveen N. Rao
2020-03-27 11:32 ` [PATCH v4 6/6] pseries/sysfs: Minimise IPI noise while reading [idle_][s]purr Gautham R. Shenoy
2020-04-01  9:58   ` Naveen N. Rao
2020-04-01 12:01     ` Gautham R Shenoy
2020-04-02  7:34       ` Naveen N. Rao
2020-04-03  6:28         ` Gautham R Shenoy
2020-04-03 18:10           ` Nathan Lynch

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