Christoph Lameter 9b2cd506e5 slub: Calculate min_objects based on number of processors. ... The mininum objects per slab is calculated based on the number of processors that may come online. Processors min_objects --------------------------- 1 8 2 12 4 16 8 20 16 24 32 28 64 32 1024 48 4096 56 The higher the number of processors the large the order sizes used for various slab caches will become. This has been shown to address the performance issues in hackbench on 16p etc. The calculation is only performed if slub_min_objects is zero (default). If one specifies a slub_min_objects on boot then that setting is taken. As suggested by Zhang Yanmin's performance tests on 16-core Tigerton, use the formula '4 * (fls(nr_cpu_ids) + 1)': ./hackbench 100 process 2000: 1) 2.6.25-rc6slab: 23.5 seconds 2) 2.6.25-rc7SLUB+slub_min_objects=20: 31 seconds 3) 2.6.25-rc7SLUB+slub_min_objects=24: 23.5 seconds Signed-off-by: Christoph Lameter <clameter@sgi.com> Signed-off-by: Zhang Yanmin <yanmin.zhang@intel.com> Signed-off-by: Pekka Enberg <penberg@cs.helsinki.fi>		2008-04-27 18:28:40 +03:00
..
allocpercpu.c	cpumask: Cleanup more uses of CPU_MASK and NODE_MASK	2008-04-19 19:44:58 +02:00
backing-dev.c	mm/backing-dev.c: fix percpu_counter_destroy call bug in bdi_init	2007-12-05 09:21:18 -08:00
bootmem.c	mm: fix boundary checking in free_bootmem_core	2008-03-24 19:22:19 -07:00
bounce.c	block: Initial support for data-less (or empty) barrier support	2007-10-16 11:03:56 +02:00
dmapool.c	pool: Improve memory usage for devices which can't cross boundaries	2007-12-04 10:39:58 -05:00
fadvise.c	check ADVICE of fadvise64_64 even if get_xip_page is given	2008-02-05 09:44:19 -08:00
filemap_xip.c	Use pgoff_t instead of unsigned long	2008-02-08 09:22:32 -08:00
filemap.c	mm: fix various kernel-doc comments	2008-03-19 18:53:35 -07:00
fremap.c	mm: fix various kernel-doc comments	2008-03-19 18:53:35 -07:00
highmem.c	mm: highmem kernel-doc additions	2008-03-19 18:53:35 -07:00
hugetlb.c	hugetlb: fix potential livelock in return_unused_surplus_hugepages()	2008-03-26 15:01:33 -07:00
internal.h	Solve section mismatch for free_area_init_core.	2008-02-23 17:13:24 -08:00
Kconfig	sh: Bump number of quicklists for SH-5.	2008-01-28 13:18:55 +09:00
maccess.c	kgdb: fix optional arch functions and probe_kernel_*	2008-04-17 20:05:39 +02:00
madvise.c	speed up madvise_need_mmap_write() usage	2007-07-16 09:05:36 -07:00
Makefile	uaccess: add probe_kernel_write()	2008-04-17 20:05:36 +02:00
memcontrol.c	memcg: fix node_state handling	2008-04-08 18:25:53 -07:00
memory_hotplug.c	driver core: memory: semaphore to mutex	2008-04-19 19:10:19 -07:00
memory.c	memcg: when do_swap's do_wp_page fails	2008-03-04 16:35:14 -08:00
mempolicy.c	mempolicy: fix reference counting bugs	2008-03-10 18:01:19 -07:00
mempool.c	spelling fixes: mm/	2007-10-20 01:27:18 +02:00
migrate.c	memcg: fix VM_BUG_ON from page migration	2008-03-04 16:35:14 -08:00
mincore.c	[PATCH] mincore: vma crossing fix	2007-02-15 09:57:03 -08:00
mlock.c	do not limit locked memory when RLIMIT_MEMLOCK is RLIM_INFINITY	2007-07-16 09:05:37 -07:00
mmap.c	mm: special mapping nopage	2008-02-08 18:57:39 -08:00
mmzone.c	[PATCH] remove EXPORT_UNUSED_SYMBOL'ed symbols	2006-12-07 08:39:44 -08:00
mprotect.c	fix mprotect vma_wants_writenotify prot	2007-10-23 08:32:06 -07:00
mremap.c	sparse pointer use of zero as null	2007-10-18 14:37:31 -07:00
msync.c	Detach sched.h from mm.h	2007-05-21 09:18:19 -07:00
nommu.c	nommu: add new vmalloc_user() and remap_vmalloc_range() interfaces.	2008-02-05 09:44:21 -08:00
oom_kill.c	memcg: fix oops in oom handling	2008-04-15 19:35:40 -07:00
page_alloc.c	nodemask: use new node_to_cpumask_ptr function	2008-04-19 19:44:59 +02:00
page_io.c	mm: fix PageUptodate data race	2008-02-05 09:44:19 -08:00
page_isolation.c	memory hotremove: unset migrate type "ISOLATE" after removal	2007-11-14 18:45:38 -08:00
page-writeback.c	writeback: speed up writeback of big dirty files	2008-02-05 09:44:19 -08:00
pagewalk.c	mm: fix various kernel-doc comments	2008-03-19 18:53:35 -07:00
pdflush.c	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/juhl/trivial	2008-04-21 16:36:46 -07:00
prio_tree.c	spelling fixes: mm/	2007-10-20 01:27:18 +02:00
quicklist.c	quicklists: Only consider memory that can be used with GFP_KERNEL	2008-01-14 08:52:22 -08:00
readahead.c	mm/readahead: fix kernel-doc notation	2008-03-19 18:53:37 -07:00
rmap.c	mm: rmap kernel-doc fixes	2008-03-19 18:53:35 -07:00
shmem_acl.c	[PATCH] Fix typos in mm/shmem_acl.c	2006-10-11 11:14:23 -07:00
shmem.c	mm/shmem and tiny-shmem: fix some kernel-doc	2008-03-19 18:53:35 -07:00
slab.c	nodemask: use new node_to_cpumask_ptr function	2008-04-19 19:44:59 +02:00
slob.c	slob: fix bug - when slob allocates "struct kmem_cache", it does not force alignment.	2008-04-27 18:25:51 +03:00
slub.c	slub: Calculate min_objects based on number of processors.	2008-04-27 18:28:40 +03:00
sparse-vmemmap.c	NULL noise: fs/*, mm/*, kernel/*	2008-03-30 14:18:41 -07:00
sparse.c	mm: sparsemem memory_present() fix	2008-04-15 19:30:19 -07:00
swap_state.c	mm: fix various kernel-doc comments	2008-03-19 18:53:35 -07:00
swap.c	mm: fix various kernel-doc comments	2008-03-19 18:53:35 -07:00
swapfile.c	d_path: Make seq_path() use a struct path argument	2008-02-14 21:17:08 -08:00
thrash.c	Bug in mm/thrash.c function grab_swap_token()	2007-05-11 08:29:32 -07:00
tiny-shmem.c	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6	2008-03-25 08:57:47 -07:00
truncate.c	docbook: fix kernel-api source files	2008-03-03 10:47:14 -08:00
util.c	fix mm/util.c:krealloc()	2007-11-14 18:45:41 -08:00
vmalloc.c	mm: fix various kernel-doc comments	2008-03-19 18:53:35 -07:00
vmscan.c	nodemask: use new node_to_cpumask_ptr function	2008-04-19 19:44:59 +02:00
vmstat.c	add "Isolate" migratetype name to /proc/pagetypeinfo	2008-04-15 19:35:41 -07:00