This change allows to determine power source via sysctl or /dev/apm
when devd(8) is running (used by default).
Based on patch from PR; other changes on top of it:
- '-f' (force) -> '-s' (source) parameter renaming;
- allow 'apm' -> 'devd' transition when '-s devd' is set
(if APM is enabled);
- man page update.
Checked on amd64 with -s devd / sysctl and apm
(an extra build with forced USE_APM define set was done)
PR: 125707
Submitted by: Konstantin Stepanov <milezv@yandex.ru>
Reviewed by: bcr, imp
MFC after: 1 week
Differential Revision: https://reviews.freebsd.org/D18742
Mainly focus on files that use BSD 2-Clause license, however the tool I
was using misidentified many licenses so this was mostly a manual - error
prone - task.
The Software Package Data Exchange (SPDX) group provides a specification
to make it easier for automated tools to detect and summarize well known
opensource licenses. We are gradually adopting the specification, noting
that the tags are considered only advisory and do not, in any way,
superceed or replace the license texts.
No functional change intended.
Off by default, build behaves normally.
WITH_META_MODE we get auto objdir creation, the ability to
start build from anywhere in the tree.
Still need to add real targets under targets/ to build packages.
Differential Revision: D2796
Reviewed by: brooks imp
this could lead to the -n option effectively being ignored (in case
ac_line happened to be 0 aka SRC_AC), or other undefined behaviour.
PR: 169779
Submitted by: Alex Gonzalez <loox at e-shell.net>
Reviewed by: jhb
MFC after: 2 weeks
reading current frequency on every period. Instead do it only after
changing and periodically from time to time if somebody else change it.
Also dynamically decrease sampling frequency up to 4 times on inactivity,
I was considering committing all these patches one by one, but as
discussed with brooks@, there is no need to do this. If we ever
need/want to merge these changes back, it is still possible to do this
per application.
1. Make it more SMP polite. Previous version uses average CPU load that
often leads to load underestimation. It make powerd with default
configuration unusable on systems with more then 2 CPUs. I propose to use
summary load instead of average one. IMO this is the best we can do without
specially tuned scheduler. Also as soon as measuring total load on SMP
systems is more useful then total idle, I have switched to it.
2. Make powerd's operation independent from number and size of frequency
levels. I have added internal frequency counter which translated into real
frequencies only on a last stage and only as good as gone. Some systems may
have only several power levels, while others - many of them, so adaptation
time with previous approach was completely different.
3. As part of previous I have changed adaptive mode to rise frequency on
demand up to 2 times and fall on 1/8 per time internal.
4. For desktop (AC-powered) systems I have added one more mode - "hiadaptive".
It rises frequency twice faster, drops it 4 times slower, prefers twice
lower CPU load and has additional delay before leaving the highest frequency
after the period of maximum load. This mode was specially made to improve
interactivity of the systems where operation capabilities are more
significant then power consumption, but keeping maximum frequency all the
time is not needed.
5. I have reduced default polling interval from 1/2 to 1/4 of second.
It is not so important for algorithm math now, but gives better system
interactivity.
Discussed on: mobile@
the parent's signal mask. Once daemon() forked, signals would be ignored
in the child thread. While I'm here, check the return value of daemon().
This fixes termination in the daemon case (bug introduced in last commit).
Noticed by: Frederik Lindberg
status. Add a thread that waits for events on the named pipe instead of
polling the line status via apm or the ACPI sysctl. Additionally, use
robust error handling in case devd goes away or we temporarily can't set
a frequency (i.e., passive cooling has preempted our setting).
Later, this should be improved so that if adaptive control is not being used,
we will block while waiting for AC line events, saving a little CPU.
Submitted by: Frederik Lindberg <fli+freebsd-current/shapeshifter.se>
