after. Unify the paths for all Cx states. Remove cpu_idle_busy and
instead do the little profiling we need before re-enabling interrupts.
Use 1 quantum as estimate for C1 sleep duration since the timer interrupt
is the main reason we wake.
While here, change the cx_history sysctl to cx_usage and report statistics
for which idle states were used in terms of percent. This seems more
intuitive than counters. Remove the cx_stats structure since it's no
longer used. Update the man page.
Change various types which do not need explicit size.
Sort acpi debug values. Change "disable" to "disabled" to match rest of
the kernel. Remove debugging from acpi_toshiba since it was only used for
probe/attach.
device.hints kernel environment variables when disabling ACPI.
Some users are getting confused when they see hint.acpi.0.disabled.
They are confusing it with a sysctl MIB.
Finally, add a reference for device.hints(5) and kenv(1)
in the "SEE ALSO" section of the man page.
PR: docs/62974
Submitted by: Christian S.J. Peron <maneo@bsdpro.com>
is reserved by the loader, and thus any tunable name with that suffix will
be silently discarded.
Document this in the header and man page so that other developers do not
develop so many bumps on the head after banging it against the wall.
Detective work by: Mark Santcroos, grehan
valid value for cx_lowest. To disable sleeping, use machdep.cpu_idle_hlt
instead. Update the version of the ACPI spec we implement.
Approved by: re (implicitly)
* Use the cpu_idle_hook() to do idling for C1-C3.
* Use both _CST and the FADT to detect Cx states.
* Use both _PTC and P_CNT for controlling throttling.
* Add a notify handler to detect changes in _CST and _PSS
* Call the _INI function for each processor if present. This will be
done by ACPI-CA in the future.
* Fix a bug on SMP systems where CPUs will attach multiple times if the
bus is rescan.
* Document new sysctls for controlling idling.
on and fix if neceeary).
o Note that acpi is available on i386-ia32, ia64 and amd64, not just 'intel'
platforms. Intel has had nothing to do with amd64.
Approved by: re (scottl@)
kharma it will be to disable some or all of acpi on ia64 or amd64 (are
there other non-i386 platforms that FreeBSD supports with ACPI?).
Submitted by: Ryan Losh
Approved by: re@ (rwatson)
