> KOSAKI Motohiro wrote: > > > When hackbench running, SLUB consume memory very largely than SLAB. > > then, SLAB often outperform SLUB in memory stavation state. > > > > I don't know why memory comsumption different. > > Anyone know it? > > Can you quantify the difference? machine spec: CPU: IA64 x 8 MEM: 8G (4G x2node) test method 1. echo 3 >/proc/sys/vm/drop_caches 2. % ./hackbench 90 process 1000 <- for fill pagetable cache 3. % ./hackbench 90 process 1000 vmstat result <SLAB (without CONFIG_DEBUG_SLAB)> procs -----------memory---------- ---swap-- -----io---- --system-- -----cpu------ r b swpd free buff cache si so bi bo in cs us sy id wa st 2 0 0 3223168 6016 38336 0 0 0 0 3181 4314 0 15 85 0 0 2039 2 0 2022144 6016 38336 0 0 0 0 2364 13622 0 49 51 0 0 634 0 0 2629824 6080 38336 0 0 0 64 83582 2538927 5 95 0 0 0 596 0 0 2842624 6080 38336 0 0 0 0 6864 675841 6 94 0 0 0 590 0 0 2993472 6080 38336 0 0 0 0 9514 456085 6 94 0 0 0 503 0 0 3138560 6080 38336 0 0 0 0 8042 276024 4 96 0 0 0 about 3G remain. <SLUB> procs -----------memory---------- ---swap-- -----io---- --system-- -----cpu------ r b swpd free buff cache si so bi bo in cs us sy id wa st 1066 0 0 323008 3584 18240 0 0 0 0 12037 47353 1 99 0 0 0 1101 0 0 324672 3584 18240 0 0 0 0 6029 25100 1 99 0 0 0 913 0 0 330240 3584 18240 0 0 0 0 9694 54951 2 98 0 0 0 about 300M remain. So, about 2.5G - 3G difference in 8G mem. -- To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
