Hi Tom, thanks for the clarification.
Just to be sure: The CPU is brand new and it is of the 0x10 family, so I assumed that p-state scaling works. Or is the issue more subtle than that? Thanks, Constantin Tom de Waal wrote: > Constantin, > > The issue is with your CPU. AMD X2's aren't p-state invariant. Therefore > p-state scaling would impact all timing on your system and therefore its > not supported. AMD X3 and newer CPU's do work (as they are p-state > invariant). > > C-states are supported and do work (as you have observed). > > If you p-state scaling you need to get a newer CPU.... > > Regards, > > Tom. > > > > > Constantin Gonzalez wrote: >> Hi, >> >> I'm building a new OpenSolaris home server and have poked around some >> power >> management issues. Here are some of my observations and it would be >> nice if >> someone could confirm if I'm corrent and maybe provide some >> suggestions on how >> I can improve stuff. >> >> - Motherboard is an Asus M3A78-CM. It supports ACPI 2.0 >> >> - CPU is an AMD Athlon II X2 >> >> - OS is OpenSolaris 2009.06, latest support repository update. >> >> - OpenSolaris power management works out of the box. Thanks to the PM >> team! >> >> Powertop shows me that: >> - During idle, the CPU is mostly in it's C1 state (close to 90% of >> the time) >> - The CPU is running at only 800 MHz when idle >> - Occassionally, it bumps up the speed to it's highest frequency. >> - But it never uses a P-state in between. >> Why is this? Is the use of intermediary P-states not implemented in >> OpenSolaris (yet)? >> >> - I've been trying to learn more about the CPU with kstat -m cpu_info: >> - I can see all supported MHz settings, consistent with what >> powertop shows >> me. >> - But current_clock_Hz never shows me the smallest setting (800 MHz) >> despite >> powertop reporting it. It seems to only show the highest setting. >> - Could it be that my use of kstat triggered the CPU to go it it's full >> frequency? >> - Or am I just unlucky and kstat only shows the instances where the CPU >> runs fast by chance? >> - Or something else? >> >> - I'd like to get temperature and fan statistics from the motherboard, >> but >> have not yet found a way to do this: >> >> - scanning kstat -l for anything acpi related only reveals basic acpi >> variables, but nothing temperature or fan related: >> acpi:0:acpi:class >> acpi:0:acpi:crtime >> acpi:0:acpi:preferred_pm_profile >> acpi:0:acpi:S3 >> acpi:0:acpi:snaptime >> acpi_drv:0:battery warning:class >> acpi_drv:0:battery warning:crtime >> acpi_drv:0:battery warning:enabled >> acpi_drv:0:battery warning:low capacity threshold >> acpi_drv:0:battery warning:snaptime >> acpi_drv:0:battery warning:warn capacity threshold >> acpi_drv:0:power:class >> acpi_drv:0:power:crtime >> >> - The tzmon module is not loaded, so using tzmon.d (from one of the >> pm related >> threads) does not work for me. >> >> - The tzmon man page mentions ACPI 3.0 and my motherboard only >> supports ACPI >> 2.0. Is this the reason why OpenSolaris didn't enable the tzmon >> kernel >> module? >> Loading the module by hand doesn't seem to do anything and tzmon.d >> doesn't >> do anything, so I have to assume tzmon simply doesn't work if the >> motherboard is ACPI 2.0 only. >> >> - Is there a (potentially hidden) way to still get temperature/fan >> stats from >> the motherboard? Do we have any ACPI tools I can play with? >> >> Again, kudos to the PM team, I'm very pleased PM is working well for >> my system. >> >> I'd just like to go the next step and see P-states supported as well >> as being >> able to read temperature and fan stats from the motherboard. Any help >> in getting >> to this is greatly appreciated! >> >> >> Cheers, >> Constantin >> > > -- Constantin Gonzalez Sun Microsystems GmbH, Germany Principal Field Technologist http://blogs.sun.com/constantin Tel.: +49 89/4 60 08-25 91 http://google.com/search?q=constantin+gonzalez Sitz d. Ges.: Sun Microsystems GmbH, Sonnenallee 1, 85551 Kirchheim-Heimstetten Amtsgericht Muenchen: HRB 161028 Geschaeftsfuehrer: Thomas Schroeder, Wolfgang Engels, Wolf Frenkel Vorsitzender des Aufsichtsrates: Martin Haering
