Bug #2490
Updated by jorisgio almost 10 years ago
nmalloc returns addresses without regard as to whether those addresses will result in cache bank conflicts; cache bank conflicts will result in wasting a fair amount of a CPU's load bandwidth, as seen in the Himeno matrix benchmark, among others. commit 8120f5e2a46e669c06a7afdd7de60fa6d6996f9d added simple cache coloring to nmalloc for 32KB allocations, offsetting them by 4KB. While it does work (and restores Himeno's performance), it can be substantially improved on. We should look at doing so. -- vs;