https://bugzilla.kernel.org/show_bug.cgi?id=14771 --- Comment #22 from Robert Bradbury <robert.bradbury@xxxxxxxxx> 2010-06-26 05:15:24 --- Thomas, I would agree that I could very easily be on the wrong track as Mike is working with a Core 2 processor/BIOS (which I strongly suspect should support "Enhanced" SpeedStep and the associated ACPI BIOS presuming Dell provides that). That machine is probably of the order of ~2 years old. I on the other hand am working with a 4-5 year old Pentium IV Prescott which does not support "Enhanced" SpeedStep in a HP Pavilion with an ACPI BIOS which does not support processor scaling (_PCT) (presumably because the Desktop processor itself does not allow it). This is evidenced by the fact that when the proper Linux CONFIG & diagnostic flags are set, I do get: "ACPI-based processor performance control unavailable" and the associated ENODEV. But the *default* Linux messages (i.e. those available without jumping through hoops) do not make it clear when (a) ones processor WILL or WILL NOT support Enhanced SpeedStep (which could in theory be controlled by the ACPI BIOS); and (b) ones ACPI BIOS does or does not have the capability of controlling the processor in that way (i.e. one can effectively use acpi-cpufreq vs. p4-clockmod). These are two different entities. Just because one has the processor doesn't mean you have the BIOS and one could envision situations where one has the BIOS features without a processor that can use them. All of my messages to various forums (and the lack of response) seem to suggest that one cannot get effective "awareness" of ones clock speed (and power consumption) when using acpi-cpufreq unless one has an ACPI 4.0 BIOS and there doesn't appear to be any user level facility (like the Gnome CPU Frequency Scaling Monitor) which could monitor these statistics and report them to the user. The key point is whether or not the user knows when and why his computer may be running amok (from a program/CPU use perspective). Sure I can run "top" but that doesn't give me the focus that the CFSM provides. A 4 panel-window System Monitor (CPU+MEM+Network+Disk) and the CFSM provides a very good real time monitor/diagnostic for what ones system is doing and the source of any problems. -- Configure bugmail: https://bugzilla.kernel.org/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are the assignee for the bug. -- To unsubscribe from this list: send the line "unsubscribe cpufreq" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
