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