On Tue, 5 Oct 2010, Christoph Lameter wrote: > V3->V4: > - Lots of debugging > - Performance optimizations (more would be good)... > - Drop per slab locking in favor of per node locking for > partial lists (queuing implies freeing large amounts of objects > to per node lists of slab). > - Implement object expiration via reclaim VM logic. > I applied this set on top of Pekka's for-next tree reverted back to 5d1f57e4 since it doesn't apply later then that. Overall, the results are _much_ better than the vanilla slub allocator that I frequently saw ~20% regressions with the TCP_RR netperf benchmark on a couple of my machines with larger cpu counts. However, there still is a significant performance degradation compared to slab. When running this patchset on two (client and server running netperf-2.4.5) four 2.2GHz quad-core AMD processors with 64GB of memory, here're the results: threads SLAB SLUB diff 16 207038 184389 -10.9% 32 266105 234386 -11.9% 48 287989 252733 -12.2% 64 307572 277221 - 9.9% 80 309802 284199 - 8.3% 96 302959 291743 - 3.7% 112 307381 297459 - 3.2% 128 314582 299340 - 4.8% 144 331945 299648 - 9.7% 160 321882 314192 - 2.4% -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxxx For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>