On Thu, 27 Aug 2015, Navin Parakkal wrote: > Hi, > > I found that in many worst case scenarios like fragmention of > allocator , slub performs well than slab. > I also noticed that Centos /Ubuntu etc switched to SLUB but SLES > still uses SLAB in the default image. > > Any particular reason where SLAB is the choice ? >
Slab doesn't have a reliance on high-order allocations for performance where fragmentation is a problem, it can use a smaller footprint due to slub's per-cpu partial slabs, it is faster on some networking round-robin benchmarks on nUMA machines, and it is has less impact when implementing full kmem accounting for memcg. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
