From: Mel Gorman <mgorman@techsingularity.net>
To: Andrew Morton <akpm@linux-foundation.org>
Cc: Vlastimil Babka <vbabka@suse.cz>, Linux-MM <linux-mm@kvack.org>,
LKML <linux-kernel@vger.kernel.org>,
Mel Gorman <mgorman@techsingularity.net>
Subject: [PATCH 04/22] mm, page_alloc: Inline zone_statistics
Date: Mon, 11 Apr 2016 09:13:27 +0100 [thread overview]
Message-ID: <1460362424-26369-5-git-send-email-mgorman@techsingularity.net> (raw)
In-Reply-To: <1460362424-26369-1-git-send-email-mgorman@techsingularity.net>
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>
---
include/linux/vmstat.h | 2 --
mm/page_alloc.c | 31 +++++++++++++++++++++++++++++++
mm/vmstat.c | 29 -----------------------------
3 files changed, 31 insertions(+), 31 deletions(-)
diff --git a/include/linux/vmstat.h b/include/linux/vmstat.h
index 73fae8c4a5fb..152d26b7f972 100644
--- a/include/linux/vmstat.h
+++ b/include/linux/vmstat.h
@@ -163,12 +163,10 @@ static inline unsigned long zone_page_state_snapshot(struct zone *zone,
#ifdef CONFIG_NUMA
extern unsigned long node_page_state(int node, enum zone_stat_item item);
-extern void zone_statistics(struct zone *, struct zone *, gfp_t gfp);
#else
#define node_page_state(node, item) global_page_state(item)
-#define zone_statistics(_zl, _z, gfp) do { } while (0)
#endif /* CONFIG_NUMA */
diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 6812de41f698..b56c2b2911a2 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -2352,6 +2352,37 @@ 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
diff --git a/mm/vmstat.c b/mm/vmstat.c
index 2e58ead9bcf5..a4bda11eac8d 100644
--- a/mm/vmstat.c
+++ b/mm/vmstat.c
@@ -570,35 +570,6 @@ void drain_zonestat(struct zone *zone, struct per_cpu_pageset *pset)
#ifdef CONFIG_NUMA
/*
- * zonelist = the list of zones passed to the allocator
- * z = the zone from which the allocation occurred.
- *
- * 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.
- */
-void zone_statistics(struct zone *preferred_zone, struct zone *z, gfp_t flags)
-{
- 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);
- }
-}
-
-/*
* Determine the per node value of a stat item.
*/
unsigned long node_page_state(int node, enum zone_stat_item item)
--
2.6.4
--
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next prev parent reply other threads:[~2016-04-11 8:14 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-04-11 8:13 [PATCH 00/21] Optimise page alloc/free fast paths Mel Gorman
2016-04-11 8:13 ` [PATCH 01/22] mm, page_alloc: Only check PageCompound for high-order pages Mel Gorman
2016-04-11 8:13 ` [PATCH 02/22] mm, page_alloc: Use new PageAnonHead helper in the free page fast path Mel Gorman
2016-04-11 8:13 ` [PATCH 03/22] mm, page_alloc: Reduce branches in zone_statistics Mel Gorman
2016-04-11 8:13 ` Mel Gorman [this message]
2016-04-11 8:13 ` [PATCH 05/22] mm, page_alloc: Inline the fast path of the zonelist iterator Mel Gorman
2016-04-11 8:13 ` [PATCH 06/22] mm, page_alloc: Use __dec_zone_state for order-0 page allocation Mel Gorman
2016-04-11 8:13 ` [PATCH 07/22] mm, page_alloc: Avoid unnecessary zone lookups during pageblock operations Mel Gorman
2016-04-11 8:13 ` [PATCH 08/22] mm, page_alloc: Convert alloc_flags to unsigned Mel Gorman
2016-04-11 8:13 ` [PATCH 09/22] mm, page_alloc: Convert nr_fair_skipped to bool Mel Gorman
2016-04-11 8:13 ` [PATCH 10/22] mm, page_alloc: Remove unnecessary local variable in get_page_from_freelist Mel Gorman
2016-04-11 8:13 ` [PATCH 11/22] mm, page_alloc: Remove unnecessary initialisation " Mel Gorman
2016-04-11 8:13 ` [PATCH 12/22] mm, page_alloc: Remove unnecessary initialisation from __alloc_pages_nodemask() Mel Gorman
2016-04-11 8:13 ` [PATCH 13/22] mm, page_alloc: Remove redundant check for empty zonelist Mel Gorman
2016-04-11 8:13 ` [PATCH 14/22] mm, page_alloc: Simplify last cpupid reset Mel Gorman
2016-04-11 8:13 ` [PATCH 15/22] mm, page_alloc: Move might_sleep_if check to the allocator slowpath Mel Gorman
2016-04-11 8:13 ` [PATCH 16/22] mm, page_alloc: Move __GFP_HARDWALL modifications out of the fastpath Mel Gorman
2016-04-11 8:13 ` [PATCH 17/22] mm, page_alloc: Reduce cost of fair zone allocation policy retry Mel Gorman
2016-04-11 8:13 ` [PATCH 18/22] mm, page_alloc: Shortcut watermark checks for order-0 pages Mel Gorman
2016-04-11 8:13 ` [PATCH 19/22] mm, page_alloc: Avoid looking up the first zone in a zonelist twice Mel Gorman
2016-04-11 8:13 ` [PATCH 20/22] mm, page_alloc: Check multiple page fields with a single branch Mel Gorman
2016-04-11 8:13 ` [PATCH 21/22] cpuset: use static key better and convert to new API Mel Gorman
2016-04-11 8:18 ` [PATCH 00/21] Optimise page alloc/free fast paths Mel Gorman
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