Mailinglist Archive: opensuse-bugs (3547 mails)

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https://bugzilla.novell.com/show_bug.cgi?id=675161

https://bugzilla.novell.com/show_bug.cgi?id=675161#c40


--- Comment #40 from Graham Anderson <graham@xxxxxxxxxx> 2011-09-26 23:44:11 
UTC ---
(In reply to comment #39)
> so with intel_idle.max_cstate=0, there is nothing
> under /sys/devices/system/cpu/cpu0/cpuidle ?

Yes nothing, with intel_idle.max_cstate=0 
cpuidle only appears under /sys/devices/system/cpu/cpuidle

mercury:~ # tree /sys/devices/system/cpu/cpuidle
/sys/devices/system/cpu/cpuidle
├── current_driver
└── current_governor_ro

mercury:~ # tree /sys/devices/system/cpu/cpu0
/sys/devices/system/cpu/cpu0
├── cache
│   ├── index0
│   │   ├── coherency_line_size
│   │   ├── level
│   │   ├── number_of_sets
│   │   ├── physical_line_partition
│   │   ├── shared_cpu_list
│   │   ├── shared_cpu_map
│   │   ├── size
│   │   ├── type
│   │   └── ways_of_associativity
│   ├── index1
│   │   ├── coherency_line_size
│   │   ├── level
│   │   ├── number_of_sets
│   │   ├── physical_line_partition
│   │   ├── shared_cpu_list
│   │   ├── shared_cpu_map
│   │   ├── size
│   │   ├── type
│   │   └── ways_of_associativity
│   ├── index2
│   │   ├── coherency_line_size
│   │   ├── level
│   │   ├── number_of_sets
│   │   ├── physical_line_partition
│   │   ├── shared_cpu_list
│   │   ├── shared_cpu_map
│   │   ├── size
│   │   ├── type
│   │   └── ways_of_associativity
│   └── index3
│       ├── coherency_line_size
│       ├── level
│       ├── number_of_sets
│       ├── physical_line_partition
│       ├── shared_cpu_list
│       ├── shared_cpu_map
│       ├── size
│       ├── type
│       └── ways_of_associativity
├── crash_notes
├── microcode
│   ├── processor_flags
│   ├── reload
│   └── version
├── node0 -> ../../node/node0
├── thermal_throttle
│   └── core_throttle_count
└── topology
    ├── core_id
    ├── core_siblings
    ├── core_siblings_list
    ├── physical_package_id
    ├── thread_siblings
    └── thread_siblings_list

However, if I successfully boot with intel_idle.max_cstate=1 then 
info _does_ appear under /sys/devices/system/cpu/cpu0/cpuidle

> Is the default BIOS SETUP configuration being used?

No, memory profile is manually configured. CPU, QPI, BCLK & PCI 
bus are all set to Auto. No voltage tweaks.

> Are there any BIOS SETUP options for processor power management
> related to C-states?

The following options are available and are set as follows, 

CPU Enhanced Halt(C1E): Auto
C3/C6/C7 State Support: Auto
CPU EIST Function: Auto

Other options in the same section are:

Intel(R) Turbo Boost Tech.: Auto
CPU Cores Enabled: All
CPU Multi-Threading: Enable
Bi-Directional PROCHOT: Enable

I will reset BIOS to default and/or fail-safe and try again.

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