Level 2 cache activation code?

[ron minnich]

On Fri, 14 Nov 2003, Svante Signell wrote:

> I have now run the lmbench3-0-a3 tests. For the correctly working 1.4
> GHz Tualatin CPU the latency numbers shows jumps from 2ns to 6ns at 16k
> array size and from 6ns to 120ns at 265k array size. I assume this
> indicates correctly working level 1 and 2 caches. 

yes.

> For the erroneous motherboard with a 1.3GHz Tualatin CPU the numbers are
> around 400ns independent of array size. The only thing changig is that
> the latency numbers increase to 440-460ns for large values of the
> stride. My interpretation is that not even the L1 cache is working
> properly. All other tests indicate a _very_ slow CPU, around 7MHz is
> measured by lmbench (BTW how good is this value?)  compared to the
> expected 1.3GHz. Two questions immediately arise.

weird. I have no idea what's going on here. Something is really wrong.

ron