7ef01f228c
The mitigation episodes are recorded. A mitigation episode happens
when the first trip point is crossed the way up and then the way
down. During this episode other trip points can be crossed also and
are accounted for this mitigation episode. The interesting information
is the average temperature at the trip point, the undershot and the
overshot. The standard deviation of the mitigated temperature will be
added later.
The thermal debugfs directory structure tries to stay consistent with
the sysfs one but in a very simplified way:
thermal/
`-- thermal_zones
|-- 0
| `-- mitigations
`-- 1
`-- mitigations
The content of the mitigations file has the following format:
,-Mitigation at 349988258us, duration=130136ms
| trip | type | temp(°mC) | hyst(°mC) | duration | avg(°mC) | min(°mC) | max(°mC) |
| 0 | passive | 65000 | 2000 | 130136 | 68227 | 62500 | 75625 |
| 1 | passive | 75000 | 2000 | 104209 | 74857 | 71666 | 77500 |
,-Mitigation at 272451637us, duration=75000ms
| trip | type | temp(°mC) | hyst(°mC) | duration | avg(°mC) | min(°mC) | max(°mC) |
| 0 | passive | 65000 | 2000 | 75000 | 68561 | 62500 | 75000 |
| 1 | passive | 75000 | 2000 | 60714 | 74820 | 70555 | 77500 |
,-Mitigation at 238184119us, duration=27316ms
| trip | type | temp(°mC) | hyst(°mC) | duration | avg(°mC) | min(°mC) | max(°mC) |
| 0 | passive | 65000 | 2000 | 27316 | 73377 | 62500 | 75000 |
| 1 | passive | 75000 | 2000 | 19468 | 75284 | 69444 | 77500 |
,-Mitigation at 39863713us, duration=136196ms
| trip | type | temp(°mC) | hyst(°mC) | duration | avg(°mC) | min(°mC) | max(°mC) |
| 0 | passive | 65000 | 2000 | 136196 | 73922 | 62500 | 75000 |
| 1 | passive | 75000 | 2000 | 91721 | 74386 | 69444 | 78125 |
More information for a better understanding of the thermal behavior
will be added after. The idea is to give detailed statistics
information about the undershots and overshots, the temperature speed,
etc... As all the information in a single file is too much, the idea
would be to create a directory named with the mitigation timestamp
where all data could be added.
Please note this code is immune against trip ordering but not against
a trip temperature change while a mitigation is happening. However,
this situation should be extremely rare, perhaps not happening and we
might question ourselves if something should be done in the core
framework for other components first.
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
[ rjw: White space fixups, rebase ]
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
|
||
|---|---|---|
| Documentation | ||
| LICENSES | ||
| arch | ||
| block | ||
| certs | ||
| crypto | ||
| drivers | ||
| fs | ||
| include | ||
| init | ||
| io_uring | ||
| ipc | ||
| kernel | ||
| lib | ||
| mm | ||
| net | ||
| rust | ||
| samples | ||
| scripts | ||
| security | ||
| sound | ||
| tools | ||
| usr | ||
| virt | ||
| .clang-format | ||
| .cocciconfig | ||
| .get_maintainer.ignore | ||
| .gitattributes | ||
| .gitignore | ||
| .mailmap | ||
| .rustfmt.toml | ||
| COPYING | ||
| CREDITS | ||
| Kbuild | ||
| Kconfig | ||
| MAINTAINERS | ||
| Makefile | ||
| README | ||
README
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.