On 09-06-16 17:42:00, Dave Hansen wrote: > Does your workload put large pages in and out of those pvecs, though? > If your system doesn't have any activity, then all we've shown is that > they're not a problem when not in use. But what about when we use them?
It doesn't. To use them extensively I guess we would have to craft a separate program for each one, which is not trivial. > Have you, for instance, tried this on a system with memory pressure? Not then, but here are exemplary snapshots with system using swap to handle allocation requests with patch applied: (notation: pages = sum in bytes): LRU_add 336 = 1344kB LRU_rotate 158 = 632kB LRU_deactivate 0 = 0kB LRU_deact_file 0 = 0kB LRU_activate 1 = 4kB --- LRU_add 3262 = 13048kB LRU_rotate 142 = 568kB LRU_deactivate 0 = 0kB LRU_deact_file 0 = 0kB LRU_activate 6 = 24kB --- LRU_add 3689 = 14756kB LRU_rotate 81 = 324kB LRU_deactivate 0 = 0kB LRU_deact_file 0 = 0kB LRU_activate 19 = 76kB While running idle os we have: LRU_add 1038 = 4152kB LRU_rotate 0 = 0kB LRU_deactivate 0 = 0kB LRU_deact_file 0 = 0kB LRU_activate 0 = 0kB I know those are not representative in overall. Thanks, Lukas
