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author | njl <njl@FreeBSD.org> | 2003-11-15 19:26:06 +0000 |
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committer | njl <njl@FreeBSD.org> | 2003-11-15 19:26:06 +0000 |
commit | 36b03f2409c46e140914bb16461d3b8fd53d6981 (patch) | |
tree | 45f4e55e56053eef945f11b0b93e18dbc72a44b6 /share/man/man4/acpi.4 | |
parent | 494ae5c16ea7eda4d789f4252798e770f97f2ca3 (diff) | |
download | FreeBSD-src-36b03f2409c46e140914bb16461d3b8fd53d6981.zip FreeBSD-src-36b03f2409c46e140914bb16461d3b8fd53d6981.tar.gz |
Implement Cx CPU idle states and updated throttling support.
* 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.
Diffstat (limited to 'share/man/man4/acpi.4')
-rw-r--r-- | share/man/man4/acpi.4 | 32 |
1 files changed, 25 insertions, 7 deletions
diff --git a/share/man/man4/acpi.4 b/share/man/man4/acpi.4 index 5761610..7dc7a73 100644 --- a/share/man/man4/acpi.4 +++ b/share/man/man4/acpi.4 @@ -309,12 +309,6 @@ Name of the DSDT table to load, if loading is enabled. Selectively disables portions of ACPI for debugging purposes. .It Va hint.acpi.0.disabled Disables all of ACPI. -.It Va hw.acpi.cpu.performance_speed -Sets the speed of the CPU, if it supports multiple speeds, while in -the performance power profile. -.It Va hw.acpi.cpu.economy_speed -Sets the speed of the CPU, if it supports multiple speeds, while in -the economy power profile. .It Va hw.acpi.ec.poll_timeout Delay in milliseconds to wait for the EC to respond. Try increasing this number if you get the error @@ -332,8 +326,32 @@ Override the interrupt to use. .It Va hw.acpi.verbose Turn on verbose debugging information about what ACPI is doing. .El +.Sh SYSCTLS +.Bl -tag -width indent +.It Va hw.acpi.cpu.performance_speed +Sets the speed of the CPU, if it supports multiple speeds, while in +the performance power profile. +.It Va hw.acpi.cpu.economy_speed +Sets the speed of the CPU, if it supports multiple speeds, while in +the economy power profile. +.It Va hw.acpi.cpu.cx_history +Debugging information listing all sleep states and the number of +long and short sleeps for each one. +The counters are reset when +.Va hw.acpi.cpu.cx_lowest +is modified. +.It Va hw.acpi.cpu.cx_lowest +Zero-based index of the lowest CPU idle state to use. +A value of -1 disables ACPI CPU idle states. +To enable ACPI CPU idling control, +.Va machdep.cpu_idle_hlt +must be set to 1. +.It Va hw.acpi.cpu.cx_supported +List of supported CPU idle states and their transition latency +in microseconds. +.El .Sh COMPATIBILITY -ACPI is only found/supported on i386/ia32, ia64 and amd64. +ACPI is only found and supported on i386/ia32, ia64, and amd64. .Sh SEE ALSO .Xr loader.conf 5 , .Xr acpiconf 8 , |