Kevin Oberman writes: > [discussion of USB/Cx level interactions clipped out...] > > If you unload the drivers, you should be to lower levels. Take a look at > sysctl hw.acpi.cpu for detail and to see how much time is spent in each > sleep state. > > I assume that you can unload the drivers, but my kernel has USB at this > time. I do plan on building a kernel without USB and see if unloading is > a workable solution. I think it should be.
I was spending all of my time in C1. After I added performance_cx_lowest="LOW" economy_cx_lowest="LOW" to my /etc/rc.conf, I found I spent all of my time in C2. I built a kernel w/ all of the usb devices commented out (and eventually remembered to set usbd_enable="NO" in /etc/rc.conf, else the modules just get kloaded...), and now I have: hw.acpi.cpu.cx_supported: C1/1 C2/1 C3/85 hw.acpi.cpu.cx_lowest: C3 hw.acpi.cpu.cx_usage: 0.00% 15.21% 84.78% If I start usbd by hand the system starts spending time in C2. If I stop usbd and kldunload usb, the system starts spending time in C3 again. g. _______________________________________________ freebsd-stable@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-stable To unsubscribe, send any mail to "[EMAIL PROTECTED]"
