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Decrease target objects per slab 

By decreasing the number of target objects per slab we increase
the likelyhood that a slab can be freed.  This reduces the level
of fragmentation in the slab which has been observed to be a
problem for certain workloads.  The penalty for this is that we
also decrease the speed which need objects can be allocated.
This commit is contained in:
Brian Behlendorf 2011-03-29 22:38:53 -07:00
parent 3336e29cc2
commit 83150861e6
1 changed files with 1 additions and 1 deletions
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include/sys/kmem.h
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@ -334,7 +334,7 @@ extern struct rw_semaphore spl_kmem_cache_sem;
#define SPL_KMEM_CACHE_DELAY 15 /* Minimum slab release age */ #define SPL_KMEM_CACHE_DELAY 15 /* Minimum slab release age */
#define SPL_KMEM_CACHE_REAP 0 /* Default reap everything */ #define SPL_KMEM_CACHE_REAP 0 /* Default reap everything */
#define SPL_KMEM_CACHE_OBJ_PER_SLAB 32 /* Target objects per slab */ #define SPL_KMEM_CACHE_OBJ_PER_SLAB 16 /* Target objects per slab */
#define SPL_KMEM_CACHE_OBJ_PER_SLAB_MIN 8 /* Minimum objects per slab */ #define SPL_KMEM_CACHE_OBJ_PER_SLAB_MIN 8 /* Minimum objects per slab */
#define SPL_KMEM_CACHE_ALIGN 8 /* Default object alignment */ #define SPL_KMEM_CACHE_ALIGN 8 /* Default object alignment */