cvs commit: src/etc/rc.d power_profile src/sys/dev/acpica acpi.c acpi_cpu.c acpi_package.c acpi_perf.c acpi_throttle.c acpivar.h

Nate Lawson njl at
Sun Jan 7 13:53:43 PST 2007

njl         2007-01-07 21:53:42 UTC

  FreeBSD src repository

  Modified files:
    etc/rc.d             power_profile 
    sys/dev/acpica       acpi.c acpi_cpu.c acpi_package.c 
                         acpi_perf.c acpi_throttle.c acpivar.h 
  Re-work Cx handling to be per-cpu and asymmetrical, fixing support on
  modern dual-core systems as well.
  - Parse the _CST packages for each cpu and track all the states individually,
  on a per-cpu basis.
  - Revert to generic FADT/P_BLK based Cx control if the _CST package
  is not present on all cpus. In that case, the new driver will
  still support per-cpu Cx state handling. The driver will determine the
  highest Cx level that can be supported by all the cpus and configure the
  available Cx state based on that.
  - Fixed the case where multiple cpus in the system share the same
  registers for Cx state handling. To do that, added a new flag
  parameter to the acpi_PkgGas and acpi_bus_alloc_gas functions that
  enable the caller to add the RF_SHAREABLE flag.  This flag could also be
  useful to other callers (acpi_throttle?) in the tree but this change is
  not yet made.
  - For Core Duo cpus, both cores seems to be taken out of C3 state when
  any one of the cores need to transition out. This broke the short sleep
  detection logic.  It is disabled now if there is more than one cpu in
  the system for now as it fixed it in my case.  This quirk may need to
  be re-enabled later differently.
  - Added support to control cx_lowest on a per-cpu basis. There is still
  a generic cx_lowest to enable changing cx_lowest for all cpus with a single
  sysctl and for ease of use.  Sample output for the new sysctl:
  dev.cpu.0.cx_supported: C1/1 C2/1 C3/57
  dev.cpu.0.cx_lowest: C3
  dev.cpu.0.cx_usage: 0.00% 43.16% 56.83%
  dev.cpu.1.cx_supported: C1/1 C2/1 C3/57
  dev.cpu.1.cx_lowest: C3
  dev.cpu.1.cx_usage: 0.00% 45.65% 54.34%
  hw.acpi.cpu.cx_lowest: C3
  This work was done by Stephane E. Potvin with some simple reworking by
  myself.  Thank you.
  Submitted by:   Stephane E. Potvin <sepotvin />
  MFC after:      2 weeks
  Revision  Changes    Path
  1.10      +1 -1      src/etc/rc.d/power_profile
  1.230     +2 -2      src/sys/dev/acpica/acpi.c
  1.60      +310 -196  src/sys/dev/acpica/acpi_cpu.c
  1.9       +2 -2      src/sys/dev/acpica/acpi_package.c
  1.25      +3 -3      src/sys/dev/acpica/acpi_perf.c
  1.10      +2 -2      src/sys/dev/acpica/acpi_throttle.c
  1.103     +3 -2      src/sys/dev/acpica/acpivar.h

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