[borgy]

ma fora s ovim "bugom" je sto fixevi inace nemaju tako izrazen udar na performanse, inace bi se mozda i zaboravio

Autor Hardcoreware

The reason they were able to proceed with the launch is that this particular erratum is fixable via a microcode update (done using a motherboard BIOS update). Basically, the part of the L3 logic that causes the problem is disabled. However, running the fix instills a performance penalty, because of how the L3 cache’s throughput and latency is affected. There was no way to know exactly how performance would be affected, except for the “around 10%” estimate that has been floating around. Fortunately, our friends at Tech Report have obtained a retail Phenom 9500, and tested its performance before and after applying the patch on an MSI motherboard.

The results were even worse than expected. When looking directly at cache memory performance, bandwidth dropped by as much as 38.7%, and latency slowed down by over 50%!

Of course, what really matters is how the actual programs we use every day are affected. Tech Report ran a full suite of Worldbench tests, to find that the performance drop ranged from around 5% to as high as 50% in programs like Firefox. The average drop in performance in their tests ended up being 13.9%.

dobra strana je dobitak na performansama kad rijese problem u 3. mjesecu