Never in C3

[Fred Labrosse <ffl-4CLdheC3Iye1Qrn1Bg8BZw@public.gmane.org>]

All,

The following seems to suggest that my processor is never in C3 state:

# cat /proc/acpi/processor/CPU0/power
active state:            C1
default state:           C1
bus master activity:     db66ffff
states:
   *C1:                  promotion[C2] demotion[--] latency[000] usage[02058670]
    C2:                  promotion[C3] demotion[C1] latency[020] usage[19743630]
    C3:                  promotion[--] demotion[C2] latency[200] usage[00000000]

Right?

I did read at some point that this was because of hotplug.  I thus stopped
hotplug and, at that time, I did see my processor in C3 state.  Hoever,
since then, I've never seen that again, and hotplug is not running.

And yes, C3 is claimed to be supported (from dmesg:

ACPI: Processor [CPU0] (supports C1 C2 C3, 8 throttling states)
)

Anything else that could cause that?  Any hints?

Cheers,

Fred



-------------------------------------------------------
This SF.Net email is sponsored by the new InstallShield X.
>From Windows to Linux, servers to mobile, InstallShield X is the
one installation-authoring solution that does it all. Learn more and
evaluate today! http://www.installshield.com/Dev2Dev/0504