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| author | Mel Gorman | 2016-05-20 02:13:27 +0200 |
|---|---|---|
| committer | Linus Torvalds | 2016-05-20 04:12:14 +0200 |
| commit | 060e74173f292fb3e0398b3dca8765568d195ff1 (patch) | |
| tree | 2b7a8c91c724ee6e0c256cdc0e71b919fcc56712 /mm/page_alloc.c | |
| parent | mm, page_alloc: reduce branches in zone_statistics (diff) | |
| download | kernel-qcow2-linux-060e74173f292fb3e0398b3dca8765568d195ff1.tar.gz kernel-qcow2-linux-060e74173f292fb3e0398b3dca8765568d195ff1.tar.xz kernel-qcow2-linux-060e74173f292fb3e0398b3dca8765568d195ff1.zip | |
mm, page_alloc: inline zone_statistics
zone_statistics has one call-site but it's a public function. Make it
static and inline.
The performance difference on a page allocator microbenchmark is;
4.6.0-rc2 4.6.0-rc2
statbranch-v1r20 statinline-v1r20
Min alloc-odr0-1 419.00 ( 0.00%) 412.00 ( 1.67%)
Min alloc-odr0-2 305.00 ( 0.00%) 301.00 ( 1.31%)
Min alloc-odr0-4 250.00 ( 0.00%) 247.00 ( 1.20%)
Min alloc-odr0-8 219.00 ( 0.00%) 215.00 ( 1.83%)
Min alloc-odr0-16 203.00 ( 0.00%) 199.00 ( 1.97%)
Min alloc-odr0-32 195.00 ( 0.00%) 191.00 ( 2.05%)
Min alloc-odr0-64 191.00 ( 0.00%) 187.00 ( 2.09%)
Min alloc-odr0-128 189.00 ( 0.00%) 185.00 ( 2.12%)
Min alloc-odr0-256 198.00 ( 0.00%) 193.00 ( 2.53%)
Min alloc-odr0-512 210.00 ( 0.00%) 207.00 ( 1.43%)
Min alloc-odr0-1024 216.00 ( 0.00%) 213.00 ( 1.39%)
Min alloc-odr0-2048 221.00 ( 0.00%) 220.00 ( 0.45%)
Min alloc-odr0-4096 227.00 ( 0.00%) 226.00 ( 0.44%)
Min alloc-odr0-8192 232.00 ( 0.00%) 229.00 ( 1.29%)
Min alloc-odr0-16384 232.00 ( 0.00%) 229.00 ( 1.29%)
Signed-off-by: Mel Gorman <mgorman@techsingularity.net>
Acked-by: Vlastimil Babka <vbabka@suse.cz>
Cc: Jesper Dangaard Brouer <brouer@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/page_alloc.c')
| -rw-r--r-- | mm/page_alloc.c | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/mm/page_alloc.c b/mm/page_alloc.c index 7be1ce8b6be0..36384baa74e1 100644 --- a/mm/page_alloc.c +++ b/mm/page_alloc.c @@ -2355,6 +2355,37 @@ int split_free_page(struct page *page) } /* + * Update NUMA hit/miss statistics + * + * Must be called with interrupts disabled. + * + * When __GFP_OTHER_NODE is set assume the node of the preferred + * zone is the local node. This is useful for daemons who allocate + * memory on behalf of other processes. + */ +static inline void zone_statistics(struct zone *preferred_zone, struct zone *z, + gfp_t flags) +{ +#ifdef CONFIG_NUMA + int local_nid = numa_node_id(); + enum zone_stat_item local_stat = NUMA_LOCAL; + + if (unlikely(flags & __GFP_OTHER_NODE)) { + local_stat = NUMA_OTHER; + local_nid = preferred_zone->node; + } + + if (z->node == local_nid) { + __inc_zone_state(z, NUMA_HIT); + __inc_zone_state(z, local_stat); + } else { + __inc_zone_state(z, NUMA_MISS); + __inc_zone_state(preferred_zone, NUMA_FOREIGN); + } +#endif +} + +/* * Allocate a page from the given zone. Use pcplists for order-0 allocations. */ static inline |