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authorAlex Shi <alex.shi@intel.com>2012-02-03 19:34:56 +0400
committerPekka Enberg <penberg@kernel.org>2012-02-18 13:00:09 +0400
commit8028dcea8abbbd51b5156e40ea214c20b559cd01 (patch)
treeb4f60cce7da33fa2942262043a3834724c07405b /include/linux/slub_def.h
parent4de900b4d6b2216b7443d32e263f5de9078697a3 (diff)
downloadlinux-8028dcea8abbbd51b5156e40ea214c20b559cd01.tar.xz
slub: per cpu partial statistics change
This patch split the cpu_partial_free into 2 parts: cpu_partial_node, PCP refilling times from node partial; and same name cpu_partial_free, PCP refilling times in slab_free slow path. A new statistic 'cpu_partial_drain' is added to get PCP drain to node partial times. These info are useful when do PCP tunning. The slabinfo.c code is unchanged, since cpu_partial_node is not on slow path. Signed-off-by: Alex Shi <alex.shi@intel.com> Acked-by: Christoph Lameter <cl@linux.com> Signed-off-by: Pekka Enberg <penberg@kernel.org>
Diffstat (limited to 'include/linux/slub_def.h')
-rw-r--r--include/linux/slub_def.h6
1 files changed, 4 insertions, 2 deletions
diff --git a/include/linux/slub_def.h b/include/linux/slub_def.h
index a32bcfdc7834..6388a6681af1 100644
--- a/include/linux/slub_def.h
+++ b/include/linux/slub_def.h
@@ -21,7 +21,7 @@ enum stat_item {
FREE_FROZEN, /* Freeing to frozen slab */
FREE_ADD_PARTIAL, /* Freeing moves slab to partial list */
FREE_REMOVE_PARTIAL, /* Freeing removes last object */
- ALLOC_FROM_PARTIAL, /* Cpu slab acquired from partial list */
+ ALLOC_FROM_PARTIAL, /* Cpu slab acquired from node partial list */
ALLOC_SLAB, /* Cpu slab acquired from page allocator */
ALLOC_REFILL, /* Refill cpu slab from slab freelist */
ALLOC_NODE_MISMATCH, /* Switching cpu slab */
@@ -37,7 +37,9 @@ enum stat_item {
CMPXCHG_DOUBLE_CPU_FAIL,/* Failure of this_cpu_cmpxchg_double */
CMPXCHG_DOUBLE_FAIL, /* Number of times that cmpxchg double did not match */
CPU_PARTIAL_ALLOC, /* Used cpu partial on alloc */
- CPU_PARTIAL_FREE, /* USed cpu partial on free */
+ CPU_PARTIAL_FREE, /* Refill cpu partial on free */
+ CPU_PARTIAL_NODE, /* Refill cpu partial from node partial */
+ CPU_PARTIAL_DRAIN, /* Drain cpu partial to node partial */
NR_SLUB_STAT_ITEMS };
struct kmem_cache_cpu {