some Cinebench r15 FX-8xxx module/thread scaling results

[jhu]

Now do the same without Turbo for the single thread.

It won't matter as much because IPC will just increase minimally but not be of much significance.

Also, i have disabled cores through BIOS, so when you see a single core or thread it means only a single core/thread was usable in the system. Same goes with Bulldozer Modules/Cores and Intel Cores/HT.

This would explain why your single-core rendering IPC results are lower than expected. Amdahl's law still holds true.

 

[Phynaz]

This is true for old static architectures with constant clock frequency and no shared components except memory bus.

With a shared cache and threads working on the same stuff they could help eachother as intelligent prefetchers (by not predicting but doing the real thing). That happens at multiple levels: shared L3$, shared L2$, shared I$ and in case of HT shared D$.

Citation needed

 

[ashetos]

Citation needed

Superlinear scaling has been discussed in academia:
http://hint.byu.edu/documentation/Gus/Superlinear/Superlinear.html