linuxppc-dev.lists.ozlabs.org archive mirror
 help / color / mirror / Atom feed
From: "Gautham R. Shenoy" <ego@linux.vnet.ibm.com>
To: Michael Ellerman <mpe@ellerman.id.au>,
	Vaidyanathan Srinivasan <svaidy@linux.vnet.ibm.com>,
	Nathan Lynch <nathanl@linux.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: "Gautham R. Shenoy" <ego@linux.vnet.ibm.com>,
	linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org
Subject: [PATCH 3/3] Documentation: Document sysfs interfaces purr, spurr, idle_purr, idle_spurr
Date: Wed, 27 Nov 2019 17:31:12 +0530	[thread overview]
Message-ID: <1574856072-30972-4-git-send-email-ego@linux.vnet.ibm.com> (raw)
In-Reply-To: <1574856072-30972-1-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 fc20cde..ecd23fb 100644
--- a/Documentation/ABI/testing/sysfs-devices-system-cpu
+++ b/Documentation/ABI/testing/sysfs-devices-system-cpu
@@ -574,3 +574,42 @@ 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:		Nov 2019
+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/spurr
+Date:		Nov 2019
+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:[~2019-11-27 12:26 UTC|newest]

Thread overview: 26+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-11-27 12:01 [PATCH 0/3] pseries: Track and expose idle PURR and SPURR ticks Gautham R. Shenoy
2019-11-27 12:01 ` [PATCH 1/3] powerpc/pseries: Account for SPURR ticks on idle CPUs Gautham R. Shenoy
2019-12-03 13:39   ` Kamalesh Babulal
2019-12-04 22:24   ` Nathan Lynch
2020-02-03  4:45     ` Gautham R Shenoy
2019-11-27 12:01 ` [PATCH 2/3] powerpc/sysfs: Show idle_purr and idle_spurr for every CPU Gautham R. Shenoy
2019-12-03 13:37   ` Kamalesh Babulal
2019-12-04 12:37     ` Gautham R Shenoy
2019-12-03 21:02   ` kbuild test robot
2019-12-04 22:24   ` Nathan Lynch
2020-02-03  4:47     ` Gautham R Shenoy
2019-12-05 16:53   ` Naveen N. Rao
2020-02-03  4:50     ` Gautham R Shenoy
2020-02-04  7:52       ` Naveen N. Rao
2020-02-05  4:19         ` Gautham R Shenoy
2020-02-05  6:58           ` Naveen N. Rao
2020-02-05  7:08   ` Christophe Leroy
2020-02-05  8:07     ` Naveen N. Rao
2019-11-27 12:01 ` Gautham R. Shenoy [this message]
2019-12-04 22:25   ` [PATCH 3/3] Documentation: Document sysfs interfaces purr, spurr, idle_purr, idle_spurr Nathan Lynch
2019-12-04 22:24 ` [PATCH 0/3] pseries: Track and expose idle PURR and SPURR ticks Nathan Lynch
2019-12-05 15:03   ` Kamalesh Babulal
2019-12-05 16:16     ` Nathan Lynch
2019-12-05 17:25       ` Naveen N. Rao
2019-12-06  9:14         ` Naveen N. Rao
2020-02-04  9:12           ` Kamalesh Babulal

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=1574856072-30972-4-git-send-email-ego@linux.vnet.ibm.com \
    --to=ego@linux.vnet.ibm.com \
    --cc=kamalesh@linux.vnet.ibm.com \
    --cc=linux-kernel@vger.kernel.org \
    --cc=linuxppc-dev@lists.ozlabs.org \
    --cc=mpe@ellerman.id.au \
    --cc=nathanl@linux.ibm.com \
    --cc=naveen.n.rao@linux.vnet.ibm.com \
    --cc=svaidy@linux.vnet.ibm.com \
    --cc=tyreld@linux.ibm.com \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).