Thread (21 messages) 21 messages, 4 authors, 2016-01-28

Re: [PATCH v7 0/6] cpufreq: powernv: Redesign the presentation of throttle notification and solve bug-fixes in the driver

From: Viresh Kumar <viresh.kumar@linaro.org>
Date: 2016-01-28 08:25:36
Also in: linux-pm, lkml

On 28-01-16, 12:55, Shilpasri G Bhat wrote:
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 machines 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. And it also fixes couple of bugs reported in the driver.

- Patch [1] fixes a memory leak bug
- Patch [2] fixes the cpu hot-plug bug in powernv_cpufreq_work_fn().
- Patch [3] solves a bug in powernv_cpufreq_throttle_check(), which
  calls in to cpu_to_chip_id() in hot path which reads DT every time
  to find the chip id.
- Patches [4] to [6] will add a perf trace point
  "power:powernv_throttle" and sysfs throttle counter stats in
  /sys/devices/system/cpu/cpufreq/chipN.

Changes from v6:
- Changes wrt comments from Balbir Singh and Viresh Kumar.
Who cares about these names in version-log ?? You have completely
missed what should have been present here. This is version log and
that's what should be present here :)

And because of that, I have to
- search for your earlier version in my mailbox
- Read all my comments
- Haven't read what Balbir have said

See ..

-- 
viresh
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