Messages in this thread | | | Date | Thu, 15 May 2008 23:30:53 +0300 | From | Pekka Enberg <> | Subject | Re: [patch 21/21] slab defrag: Obsolete SLAB |
| |
Matthew Wilcox wrote: > This is rather interesting. Since Christoph refuses to, here's my > results with 8f40f67, first with slab: > > Now, change the config to slub:
[snip]
> and we get slightly better results: > > willy@piggy:~$ sudo ./io-gen -d /dev/sda -j4 > CPU 0 completed 1000000 ops in 45.848 seconds; 21811 ops per second > CPU 2 completed 1000000 ops in 50.789 seconds; 19689 ops per second > CPU 3 completed 1000000 ops in 55.876 seconds; 17896 ops per second > CPU 1 completed 1000000 ops in 56.941 seconds; 17562 ops per second > willy@piggy:~$ sudo taskset -p 1 1001 > pid 1001's current affinity mask: f > pid 1001's new affinity mask: 1 > willy@piggy:~$ sudo ./io-gen -d /dev/sda -j4 > CPU 2 completed 1000000 ops in 45.713 seconds; 21875 ops per second > CPU 0 completed 1000000 ops in 47.020 seconds; 21267 ops per second > CPU 3 completed 1000000 ops in 58.692 seconds; 17038 ops per second > CPU 1 completed 1000000 ops in 60.389 seconds; 16559 ops per second
Slabinfo -A -r before and after the run would be nice (you CONFIG_SLUB_STATS and Documentation/vm/slabinfo.c for the latter). A separate oprofile would be nice as well. Thanks!
Pekka
| |