Jason Rhodes wrote: > Per powertop, it does, though kstat cpu_info has only shown it > running at the higher speed. Watching powertop, it does seem > to switch between pstates often. > > Sent from my iPhone
So your system is not in idle, is it? PAD has been integrated into 110, the light workload could make the pstate transition. kstat reports the snapshot of the current speed. If you keep trying several times, you should catch the lower speed. Thanks, -Aubrey > > On Mar 29, 2009, at 9:28 AM, John Martin <John.M.Martin at Sun.COM> > wrote: > > Jason Rhodes wrote: > any other OSes. Maybe Jason > can have a try some linux liveCD like Ubuntu to see > if P-state works. I just want to > make solaris pm competitive to the other OSes. I will > not persist my opinion if there > is a better reason to disable C-state PDC bits by > default. > > > For what it's worth, I fired up an Ubuntu 8.10 livecd that I > had, and it supported the two CPU speeds on my E7400 just > fine. I could even manually select either speed manually with > the Gnome power applet. Cute. > > I also upgraded to snv_110, and it appears to work as > promised. kstat cpu_info lists two supported_frequencies_Hz. > What's funny, however, is that it made no difference in power > usage. I have the computer hooked up to a Kill-a-watt, and > power consumption at idle is about 110W, both in build 105 and 110, > and in Ubuntu as well. > > OpenSolaris PowerTOP version 1.1 > > Cn Avg residency P-states (frequencies) > C0 (cpu running) (15.4%) 1596 Mhz 0.0% > C1 1.4ms (84.6%) 2793 Mhz 100.0% > > Wakeups-from-idle per second: 586.4 interval: 5.0s > no ACPI power usage estimate available > > Top causes for wakeups: > 25.4% (148.9) sched : <cross calls> > 25.2% (147.5) <kernel> : genunix`cv_wakeup > 17.1% (100.0) <kernel> : genunix`realitexpire > 17.1% (100.0) <kernel> : genunix`clock > 16.3% ( 95.6) VBoxHeadless : <cross calls> > 3.9% ( 22.8) <kernel> : > uhci`uhci_handle_root_hub_status_change > 1.7% ( 10.0) <kernel> : ata`ghd_timeout > 1.3% ( 7.8) <kernel> : > ehci`ehci_handle_root_hub_status_change > 1.0% ( 6.0) <kernel> : uhci`uhci_cmd_timeout_hdlr > 0.8% ( 4.8) <interrupt> : e1000g#2 > > Does your system ever move to the lower P-state (1596MHz)? > On my Tecra M10 and hand built i7 920, b110 + daily.0327 bfu > it quickly moves the the lowest P-state. > > We've had long discussions on other aliases on whether > Penryn/Wolfdale P-state changes amount to any real reduction > in system power. > > > > > _______________________________________________ > pm-discuss mailing list > pm-discuss at opensolaris.org > http://mail.opensolaris.org/mailman/listinfo/pm-discuss
