All, just my 2 cents :-)
since one week, I'm just installing dbsd on an hp-mini: Atom N455. I've no CPU related issues. here sysctl out put: hw.acpi.cpu.cx_lowest: C1 hw.acpi.cpu.px_dom0.available: 1666 1333 1000 hw.acpi.cpu.px_dom0.members: cpu0(1000) hw.acpi.cpu.px_dom0.select: 1000 hw.acpi.cpu.px_global: 1666 hw.acpi.cpu0.cx_supported: C1/1 C2/1 C3/57 hw.acpi.cpu0.cx_lowest: C1 hw.acpi.cpu0.cx_usage: 100.00% 0.00% 0.00% last 5000us hw.acpi.cpu1.cx_supported: C1/1 C2/1 C3/57 hw.acpi.cpu1.cx_lowest: C1 hw.acpi.cpu1.cx_usage: 100.00% 0.00% 0.00% last 5000u powerd sounds to work: dfly# powerd -d qavg= 0.02 savg= 0.00 1/ 1 ncpus=0 dom0 set frequency 1000 qavg= 1.02 savg= 0.34 0/ 0 ncpus=1 dom0 set frequency 1666 qavg= 0.00 savg= 0.22 1/ 1 ncpus=0 dom0 set frequency 1000 qavg= 0.49 savg= 0.28 0/ 0 ncpus=1 Please note that I'm using dbsd current (21/07/2012). if I can help to perform additional tests ... do not hesitate, this is test machine. Regards William ps: Later I will post more details about what is working and what not. On Mon, Jul 23, 2012 at 9:54 PM, Sven Gaerner <sgaer...@gmx.net> wrote: > On Mon, Jul 23, 2012 at 10:28:14AM +0000, Adrian Bocaniciu wrote: >> >> Intel Atom processors, unlike more expensive Intel processors, do not >> support frequency scaling. >> >> See for example the specifications for Atom D525 at: >> http://ark.intel.com/products/49490/ >> >> where it is stated that Enhanced Intel SpeedStep Technology is not >> supported. The same is written in all Atom datasheets. >> >> The only way to reduce the power consumption of Atom is to ensure that >> the processor is halted when it has nothing to do, i.e. in the idle >> loop, which I suppose that DragonFlyBSD does, or to use the ACPI C3 >> sleep state whenever you can tolerate the latency required for waking up >> the processor. >> >> I also have a couple of D525MW boards, but I have not tested >> DragonFlyBSD on them, and they are much less warm, but my Mini-ITX cases >> (Lian Li & Antec) have case coolers that ensure an adequate air flow >> inside the cases even if both the motherboards and the power supplies >> are fanless. > > Thanks for the details. I did not look at that point as I expected at > least frequency scaling which is supported by the Atom on the Fit-PC2 I > also use. > > I think I will try to get the temperature down by using a fan. But then > it is no longer a fanless system that I wanted to have running all the > time. And a system in a mini-ITX case with a temperature of 55 degrees > is not what I want to have running all the time. > > Thanks all for the help. I guess I will have to think about a > replacement to get a cooler fanless system. > > Regards, > Sven >
