|
|
|
|
|
|
by BeeOnRope
2850 days ago
|
|
|
Well you are mixing the effect of "more cores" and SMT together here. Sure, SMT helps hide some latency effects, but it doesn't significantly increase the demand for bandwidth. The increased bandwidth requirements when introducing SMT are probably approximately modeled by the increase in performance: so a 30% uplift from running two hardware threads per core means that bandwidth requirement increases by about 30%. That's not enough to turn gcc from a largely latency bound load to a memory bandwidth hog! |
|
|