Messages in this thread | | | Subject | Re: [PATCH v5 0/4] powercap/dtpm: Add the DTPM framework | From | Daniel Lezcano <> | Date | Fri, 11 Dec 2020 11:39:21 +0100 |
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Hi Rafael,
I believe I took into account all the comments, do you think it is possible to merge this series ?
On 08/12/2020 17:41, Daniel Lezcano wrote: > The density of components greatly increased the last decade bringing a > numerous number of heating sources which are monitored by more than 20 > sensors on recent SoC. The skin temperature, which is the case > temperature of the device, must stay below approximately 45°C in order > to comply with the legal requirements. > > The skin temperature is managed as a whole by an user space daemon, > which is catching the current application profile, to allocate a power > budget to the different components where the resulting heating effect > will comply with the skin temperature constraint. > > This technique is called the Dynamic Thermal Power Management. > > The Linux kernel does not provide any unified interface to act on the > power of the different devices. Currently, the thermal framework is > changed to export artificially the performance states of different > devices via the cooling device software component with opaque values. > This change is done regardless of the in-kernel logic to mitigate the > temperature. The user space daemon uses all the available knobs to act > on the power limit and those differ from one platform to another. > > This series provides a Dynamic Thermal Power Management framework to > provide an unified way to act on the power of the devices. > > Changelog: > V5: > - Fixed typos in documentation > - Added a dtpm NULL pointer check in the dtpm_register() function > V4: > - Changed fine grain spinlocks by global tree mutex lock > - Dropped tested by tag from Lukasz > - Fixed rollback routine in dtpm_cpu > - Checked freq_qos_request_active() when releasing the dtpm_cpu node > V3: > - Fixed power-limit computation in addition with the hotplugging > - Improved the encapsulation > - Added specific ops for the leaves of the tree > - Simplified API and self-encapsulation > - Fixed documentation and generated it to check the content > V2: > - Fixed indentation > - Fixed typos in comments > - Fixed missing kfree for dtpm_cpu > - Capitalize letters in the Kconfig description > - Reduced name description > - Stringified section name > - Added more debug traces in the code > - Removed duplicate initialization in the dtpm cpu > > Daniel Lezcano (4): > units: Add Watt units > Documentation/powercap/dtpm: Add documentation for dtpm > powercap/drivers/dtpm: Add API for dynamic thermal power management > powercap/drivers/dtpm: Add CPU energy model based support > > Documentation/power/index.rst | 1 + > Documentation/power/powercap/dtpm.rst | 212 ++++++++++++ > drivers/powercap/Kconfig | 13 + > drivers/powercap/Makefile | 2 + > drivers/powercap/dtpm.c | 473 ++++++++++++++++++++++++++ > drivers/powercap/dtpm_cpu.c | 257 ++++++++++++++ > include/asm-generic/vmlinux.lds.h | 11 + > include/linux/cpuhotplug.h | 1 + > include/linux/dtpm.h | 77 +++++ > include/linux/units.h | 4 + > 10 files changed, 1051 insertions(+) > create mode 100644 Documentation/power/powercap/dtpm.rst > create mode 100644 drivers/powercap/dtpm.c > create mode 100644 drivers/powercap/dtpm_cpu.c > create mode 100644 include/linux/dtpm.h > > Cc: Thara Gopinath <thara.gopinath@linaro.org> > Cc: Lina Iyer <ilina@codeaurora.org> > Cc: Ram Chandrasekar <rkumbako@codeaurora.org> > Cc: Zhang Rui <rui.zhang@intel.com> > Cc: Lukasz Luba <lukasz.luba@arm.com> > > -- > 2.17.1 >
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