From: Stewart Smith <stewart@linux.vnet.ibm.com>
To: linuxppc-dev@ozlabs.org, linux-kernel@vger.kernel.org
Cc: viresh.kumar@linaro.org, rjw@rjwysocki.net, pc@us.ibm.com,
Shilpasri G Bhat <shilpa.bhat@linux.vnet.ibm.com>,
linux-pm@vger.kernel.org
Subject: Re: [PATCH v3 0/2] cpufreq: powernv: Redesign the presentation of throttle notification
Date: Wed, 06 Jan 2016 17:51:57 +1100 [thread overview]
Message-ID: <877fjnjj3m.fsf@linux.vnet.ibm.com> (raw)
In-Reply-To: <1451899527-14359-1-git-send-email-shilpa.bhat@linux.vnet.ibm.com>
Shilpasri G Bhat <shilpa.bhat@linux.vnet.ibm.com> writes:
> In POWER8, OCC(On-Chip-Controller) can throttle the frequency of the
> CPU when the chip crosses its thermal and power limits. Currently,
> powernv-cpufreq driver detects and reports this event as a console
> message. Some boxes may not sustain the max turbo frequency in all
> conditions and can be throttled frequently. This can lead to the
> flooding of console with throttle messages. So this patchset aims to
> redesign the presentation of this event via sysfs counters and
> tracepoints.
This likely should CC stable@ as we have seen this on some machines, at
least in the lab.
--
Stewart Smith
OPAL Architect, IBM.
WARNING: multiple messages have this Message-ID (diff)
From: Stewart Smith <stewart@linux.vnet.ibm.com>
To: Shilpasri G Bhat <shilpa.bhat@linux.vnet.ibm.com>,
linuxppc-dev@ozlabs.org, linux-kernel@vger.kernel.org
Cc: viresh.kumar@linaro.org, rjw@rjwysocki.net, pc@us.ibm.com,
Shilpasri G Bhat <shilpa.bhat@linux.vnet.ibm.com>,
linux-pm@vger.kernel.org
Subject: Re: [PATCH v3 0/2] cpufreq: powernv: Redesign the presentation of throttle notification
Date: Wed, 06 Jan 2016 17:51:57 +1100 [thread overview]
Message-ID: <877fjnjj3m.fsf@linux.vnet.ibm.com> (raw)
In-Reply-To: <1451899527-14359-1-git-send-email-shilpa.bhat@linux.vnet.ibm.com>
Shilpasri G Bhat <shilpa.bhat@linux.vnet.ibm.com> writes:
> In POWER8, OCC(On-Chip-Controller) can throttle the frequency of the
> CPU when the chip crosses its thermal and power limits. Currently,
> powernv-cpufreq driver detects and reports this event as a console
> message. Some boxes may not sustain the max turbo frequency in all
> conditions and can be throttled frequently. This can lead to the
> flooding of console with throttle messages. So this patchset aims to
> redesign the presentation of this event via sysfs counters and
> tracepoints.
This likely should CC stable@ as we have seen this on some machines, at
least in the lab.
--
Stewart Smith
OPAL Architect, IBM.
next prev parent reply other threads:[~2016-01-06 6:52 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-01-01 22:21 [PATCH v2 0/2] cpufreq: powernv: Redesign the presentation of throttle notification Shilpasri G Bhat
2016-01-01 22:21 ` [PATCH v2 1/2] cpufreq: powernv/tracing: Add powernv_throttle tracepoint Shilpasri G Bhat
2016-01-01 22:21 ` [PATCH v2 2/2] cpufreq: powernv: Redesign the presentation of throttle notification Shilpasri G Bhat
2016-01-01 23:01 ` kbuild test robot
2016-01-01 23:01 ` kbuild test robot
2016-01-02 2:08 ` kbuild test robot
2016-01-02 2:08 ` kbuild test robot
2016-01-04 9:25 ` [PATCH v3 0/2] " Shilpasri G Bhat
2016-01-04 9:25 ` [PATCH v3 1/2] cpufreq: powernv/tracing: Add powernv_throttle tracepoint Shilpasri G Bhat
2016-01-04 9:25 ` [PATCH v3 2/2] cpufreq: powernv: Redesign the presentation of throttle notification Shilpasri G Bhat
2016-01-06 6:51 ` Stewart Smith [this message]
2016-01-06 6:51 ` [PATCH v3 0/2] " Stewart Smith
2016-01-11 20:54 ` [PATCH v4 0/4] " Shilpasri G Bhat
2016-01-11 20:54 ` Shilpasri G Bhat
2016-01-11 20:54 ` [PATCH v4 1/4] cpufreq: powernv: Remove cpu_to_chip_id() from hot-path Shilpasri G Bhat
2016-01-11 20:54 ` Shilpasri G Bhat
2016-01-11 20:54 ` [PATCH v4 2/4] cpufreq: powernv/tracing: Add powernv_throttle tracepoint Shilpasri G Bhat
2016-01-11 20:54 ` Shilpasri G Bhat
2016-01-11 20:54 ` [PATCH v4 3/4] cpufreq: powernv: Add a trace print for the throttle event Shilpasri G Bhat
2016-01-11 20:54 ` Shilpasri G Bhat
2016-01-11 20:54 ` [PATCH v4 4/4] cpufreq: powernv: Add sysfs attributes to show throttle stats Shilpasri G Bhat
2016-01-11 20:54 ` Shilpasri G Bhat
2016-01-11 22:23 ` [PATCH v4 0/4] cpufreq: powernv: Redesign the presentation of throttle notification Greg KH
2016-01-12 2:32 ` Viresh Kumar
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