| 1 |
On Friday 03 December 2010, meino.cramer@×××.de wrote: |
| 2 |
> Hi, |
| 3 |
> |
| 4 |
> I googled this and found some other people asking the same question... |
| 5 |
> But I didn't find the answer. |
| 6 |
> |
| 7 |
> I am using linux kernel 2.6.36.1 vanilla to run on a AMD Phenom X6 |
| 8 |
> 1090T/ASUS Crosshair IV Formula system. |
| 9 |
> |
| 10 |
> I enabled "ondemand" CPU frequency scaling givernor in the kernel and |
| 11 |
> "Cool'n' Quiet" in the bios of the board. I also enabled "Turbo Core" |
| 12 |
> in the bios (which says the 3200MHz is max and 3600 MHz in case of |
| 13 |
> Turbo Core being used.. I disabled C1E. |
| 14 |
> |
| 15 |
> After Linux is booted (AMD64!) and idled, the CPU is running at 800Mhz |
| 16 |
> (nice!) and at 3200 MHz when system is under load. |
| 17 |
> |
| 18 |
> But: |
| 19 |
> With prime I put exactly two cores under load, so normally Turbo Core |
| 20 |
> would kick in...but the clock of those both cores show 3200MHz instead |
| 21 |
> of 3600MHz.... |
| 22 |
> |
| 23 |
> How can I make use of the Turbo-Core feature unde Linux? |
| 24 |
|
| 25 |
and you looked at the speed using cat /proc/cpuinfo? |
| 26 |
|
| 27 |
Because the mhz displayed there are misleading. cpuinfo does not show at which |
| 28 |
speeds it is acutally running if there is any oc/uc involved. An overclocked |
| 29 |
cpu might show 2Ghz while it is running at 2.3GHz |
| 30 |
|
| 31 |
See: |
| 32 |
http://www.phoronix.com/forums/showthread.php?t=26065 |
Archives