From: "Naveen N. Rao" <naveen.n.rao@linux.vnet.ibm.com>
To: "Gautham R. Shenoy" <ego@linux.vnet.ibm.com>,
Kamalesh Babulal <kamalesh@linux.vnet.ibm.com>,
Michael Ellerman <mpe@ellerman.id.au>,
Nathan Lynch <nathanl@linux.ibm.com>,
Vaidyanathan Srinivasan <svaidy@linux.vnet.ibm.com>,
Tyrel Datwyler <tyreld@linux.ibm.com>
Cc: linux-kernel@vger.kernel.org, linuxppc-dev@lists.ozlabs.org
Subject: Re: [PATCH v4 5/6] Documentation: Document sysfs interfaces purr, spurr, idle_purr, idle_spurr
Date: Wed, 01 Apr 2020 15:15:57 +0530 [thread overview]
Message-ID: <1585734290.ovukp60xf0.naveen@linux.ibm.com> (raw)
In-Reply-To: <1585308760-28792-6-git-send-email-ego@linux.vnet.ibm.com>
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
next prev parent reply other threads:[~2020-04-01 9:46 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 ` [PATCH v4 5/6] Documentation: Document sysfs interfaces purr, spurr, idle_purr, idle_spurr Gautham R. Shenoy
2020-04-01 9:45 ` Naveen N. Rao [this message]
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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