Nikolay Molchanov wrote: > > Byron Servies wrote: > > On 02/21/11 02:20 PM, Nikolay Molchanov wrote: > > > >>>> No, we need all CPUs to run at the same frequency. > >>> > >>> You might try disabling cpupm (cpu power management) in > >>> /etc/power.conf and see if this does what you want. Turbo mode may > >>> still be enabled, but at least P and C-state transitions will be > >>> turned off. > >> > >> I'll try. Is it a service? I mean, can I use svcadm to enable/disable it? > >> Do I need a reboot if I change the setting in the /etc/power.conf file? > >> Currently I see these settings: > >> > >> % cat /etc/power.conf > >> ... > >> autopm default > >> cpupm enable > >> cpu-threshold 1s > >> > >> So, your suggestion is to change "cpupm" state to "disable", correct? > > > > Correct. Then run the pmconfig command to make the change in the > > running kernel. You can use the powertop command to monitor what is > > happening with cpu P and C states before and after to see if that is > > doing what you expect (powertop should work on linux, too). > > I cannot find the powertop command on this system. Do I need Solaris 11 > to have this utility? Currently this system runs Solaris 10.
I thought PowerTOP is included in S10Ux. It should work if you copy the binary from Nevada, it's not a official way though. Thanks, -Aubrey > > I changed the state of cpupm to disable, and invoked /usr/sbin/pmconfig, > but it looks like you are right about the Turbo Mode, at least our tests > show the same 13% overcounting, which means our calculation uses a CPU > frequency that is 13% below the real maximum CPU frequency. I see that > our calculation uses 2933 MHz, which is the maximum reported by "kstat > cpu_info", so it must be the Turbo Mode tat causes the difference. > > Thanks. > Nik > > > _______________________________________________ > pm-discuss mailing list > [email protected] > http://mail.opensolaris.org/mailman/listinfo/pm-discuss _______________________________________________ pm-discuss mailing list [email protected] http://mail.opensolaris.org/mailman/listinfo/pm-discuss
