John Martin <> wrote: > Bill Holler wrote: >> Hi John, >> >> The "kstat cstate" shows your system is now using C1 and C3. >> >> Your BIOS is *not* enabling C2. Many BIOS do not enable C2 >> by default due to a bug in another OS. The BIOS option to >> enable C2 is often obscurely worded, so you may have to poke >> around in the BIOS options to find it. The (Auto, C1, C1E, C3, C6) >> BIOS setting you mentioned is the "package level C-state" not >> per-core level C-state. >> > The only CPU PM options offered in the eVGA X58 SLI SBIOS: > > Intel Speed Step [Enabled | Disabled] > CxE Function [Auto | Disabled | C1 | C1E | C3 | C6] > > I did check "kstat cstate" on a Tecra M10 and it does offer C1,C2,C3. >
deeper c-state support on solaris not only needs BIOS exporting C1, C2 and C3, it also needs HPET and invariant TSC in deeper c-state. M10 is not supposed to support deep c-state because it doesn't have invariant TSC in deeper c-state. But your Nehalem i7 920 does. Thanks, -Aubrey