From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S938043AbdLSGlk (ORCPT ); Tue, 19 Dec 2017 01:41:40 -0500 Received: from mga04.intel.com ([192.55.52.120]:5921 "EHLO mga04.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S937596AbdLSGle (ORCPT ); Tue, 19 Dec 2017 01:41:34 -0500 X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.45,425,1508828400"; d="scan'208";a="3656318" From: Kemi Wang To: Greg Kroah-Hartman , Andrew Morton , Michal Hocko , Vlastimil Babka , Mel Gorman , Johannes Weiner , Christopher Lameter , YASUAKI ISHIMATSU , Andrey Ryabinin , Nikolay Borisov , Pavel Tatashin , David Rientjes , Sebastian Andrzej Siewior Cc: Dave , Andi Kleen , Tim Chen , Jesper Dangaard Brouer , Ying Huang , Aaron Lu , Aubrey Li , Kemi Wang , Linux MM , Linux Kernel Subject: [PATCH v2 1/5] mm: migrate NUMA stats from per-zone to per-node Date: Tue, 19 Dec 2017 14:39:22 +0800 Message-Id: <1513665566-4465-2-git-send-email-kemi.wang@intel.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1513665566-4465-1-git-send-email-kemi.wang@intel.com> References: <1513665566-4465-1-git-send-email-kemi.wang@intel.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org There is not really any use to get NUMA stats separated by zone, and current per-zone NUMA stats is only consumed in /proc/zoneinfo. For code cleanup purpose, we move NUMA stats from per-zone to per-node and reuse the existed per-cpu infrastructure. Suggested-by: Andi Kleen Suggested-by: Michal Hocko Signed-off-by: Kemi Wang --- drivers/base/node.c | 23 +++---- include/linux/mmzone.h | 27 ++++---- include/linux/vmstat.h | 31 --------- mm/mempolicy.c | 2 +- mm/page_alloc.c | 16 +++-- mm/vmstat.c | 177 +++++-------------------------------------------- 6 files changed, 46 insertions(+), 230 deletions(-) diff --git a/drivers/base/node.c b/drivers/base/node.c index ee090ab..a045ea1 100644 --- a/drivers/base/node.c +++ b/drivers/base/node.c @@ -169,13 +169,14 @@ static ssize_t node_read_numastat(struct device *dev, "interleave_hit %lu\n" "local_node %lu\n" "other_node %lu\n", - sum_zone_numa_state(dev->id, NUMA_HIT), - sum_zone_numa_state(dev->id, NUMA_MISS), - sum_zone_numa_state(dev->id, NUMA_FOREIGN), - sum_zone_numa_state(dev->id, NUMA_INTERLEAVE_HIT), - sum_zone_numa_state(dev->id, NUMA_LOCAL), - sum_zone_numa_state(dev->id, NUMA_OTHER)); + node_page_state(NODE_DATA(dev->id), NUMA_HIT), + node_page_state(NODE_DATA(dev->id), NUMA_MISS), + node_page_state(NODE_DATA(dev->id), NUMA_FOREIGN), + node_page_state(NODE_DATA(dev->id), NUMA_INTERLEAVE_HIT), + node_page_state(NODE_DATA(dev->id), NUMA_LOCAL), + node_page_state(NODE_DATA(dev->id), NUMA_OTHER)); } + static DEVICE_ATTR(numastat, S_IRUGO, node_read_numastat, NULL); static ssize_t node_read_vmstat(struct device *dev, @@ -190,17 +191,9 @@ static ssize_t node_read_vmstat(struct device *dev, n += sprintf(buf+n, "%s %lu\n", vmstat_text[i], sum_zone_node_page_state(nid, i)); -#ifdef CONFIG_NUMA - for (i = 0; i < NR_VM_NUMA_STAT_ITEMS; i++) - n += sprintf(buf+n, "%s %lu\n", - vmstat_text[i + NR_VM_ZONE_STAT_ITEMS], - sum_zone_numa_state(nid, i)); -#endif - for (i = 0; i < NR_VM_NODE_STAT_ITEMS; i++) n += sprintf(buf+n, "%s %lu\n", - vmstat_text[i + NR_VM_ZONE_STAT_ITEMS + - NR_VM_NUMA_STAT_ITEMS], + vmstat_text[i + NR_VM_ZONE_STAT_ITEMS], node_page_state(pgdat, i)); return n; diff --git a/include/linux/mmzone.h b/include/linux/mmzone.h index 67f2e3c..c06d880 100644 --- a/include/linux/mmzone.h +++ b/include/linux/mmzone.h @@ -115,20 +115,6 @@ struct zone_padding { #define ZONE_PADDING(name) #endif -#ifdef CONFIG_NUMA -enum numa_stat_item { - NUMA_HIT, /* allocated in intended node */ - NUMA_MISS, /* allocated in non intended node */ - NUMA_FOREIGN, /* was intended here, hit elsewhere */ - NUMA_INTERLEAVE_HIT, /* interleaver preferred this zone */ - NUMA_LOCAL, /* allocation from local node */ - NUMA_OTHER, /* allocation from other node */ - NR_VM_NUMA_STAT_ITEMS -}; -#else -#define NR_VM_NUMA_STAT_ITEMS 0 -#endif - enum zone_stat_item { /* First 128 byte cacheline (assuming 64 bit words) */ NR_FREE_PAGES, @@ -151,7 +137,18 @@ enum zone_stat_item { NR_VM_ZONE_STAT_ITEMS }; enum node_stat_item { - NR_LRU_BASE, +#ifdef CONFIG_NUMA + NUMA_HIT, /* allocated in intended node */ + NUMA_MISS, /* allocated in non intended node */ + NUMA_FOREIGN, /* was intended here, hit elsewhere */ + NUMA_INTERLEAVE_HIT, /* interleaver preferred this zone */ + NUMA_LOCAL, /* allocation from local node */ + NUMA_OTHER, /* allocation from other node */ + NR_VM_NUMA_STAT_ITEMS, +#else +#define NR_VM_NUMA_STAT_ITEMS 0 +#endif + NR_LRU_BASE = NR_VM_NUMA_STAT_ITEMS, NR_INACTIVE_ANON = NR_LRU_BASE, /* must match order of LRU_[IN]ACTIVE */ NR_ACTIVE_ANON, /* " " " " " */ NR_INACTIVE_FILE, /* " " " " " */ diff --git a/include/linux/vmstat.h b/include/linux/vmstat.h index 1779c98..80bf290 100644 --- a/include/linux/vmstat.h +++ b/include/linux/vmstat.h @@ -118,37 +118,8 @@ static inline void vm_events_fold_cpu(int cpu) * Zone and node-based page accounting with per cpu differentials. */ extern atomic_long_t vm_zone_stat[NR_VM_ZONE_STAT_ITEMS]; -extern atomic_long_t vm_numa_stat[NR_VM_NUMA_STAT_ITEMS]; extern atomic_long_t vm_node_stat[NR_VM_NODE_STAT_ITEMS]; -#ifdef CONFIG_NUMA -static inline void zone_numa_state_add(long x, struct zone *zone, - enum numa_stat_item item) -{ - atomic_long_add(x, &zone->vm_numa_stat[item]); - atomic_long_add(x, &vm_numa_stat[item]); -} - -static inline unsigned long global_numa_state(enum numa_stat_item item) -{ - long x = atomic_long_read(&vm_numa_stat[item]); - - return x; -} - -static inline unsigned long zone_numa_state_snapshot(struct zone *zone, - enum numa_stat_item item) -{ - long x = atomic_long_read(&zone->vm_numa_stat[item]); - int cpu; - - for_each_online_cpu(cpu) - x += per_cpu_ptr(zone->pageset, cpu)->vm_numa_stat_diff[item]; - - return x; -} -#endif /* CONFIG_NUMA */ - static inline void zone_page_state_add(long x, struct zone *zone, enum zone_stat_item item) { @@ -234,10 +205,8 @@ static inline unsigned long node_page_state_snapshot(pg_data_t *pgdat, #ifdef CONFIG_NUMA -extern void __inc_numa_state(struct zone *zone, enum numa_stat_item item); extern unsigned long sum_zone_node_page_state(int node, enum zone_stat_item item); -extern unsigned long sum_zone_numa_state(int node, enum numa_stat_item item); extern unsigned long node_page_state(struct pglist_data *pgdat, enum node_stat_item item); #else diff --git a/mm/mempolicy.c b/mm/mempolicy.c index 4ce44d3..b2293e3 100644 --- a/mm/mempolicy.c +++ b/mm/mempolicy.c @@ -1920,7 +1920,7 @@ static struct page *alloc_page_interleave(gfp_t gfp, unsigned order, return page; if (page && page_to_nid(page) == nid) { preempt_disable(); - __inc_numa_state(page_zone(page), NUMA_INTERLEAVE_HIT); + inc_node_state(page_pgdat(page), NUMA_INTERLEAVE_HIT); preempt_enable(); } return page; diff --git a/mm/page_alloc.c b/mm/page_alloc.c index 7e5e775..81e8d8f 100644 --- a/mm/page_alloc.c +++ b/mm/page_alloc.c @@ -2793,22 +2793,24 @@ int __isolate_free_page(struct page *page, unsigned int order) static inline void zone_statistics(struct zone *preferred_zone, struct zone *z) { #ifdef CONFIG_NUMA - enum numa_stat_item local_stat = NUMA_LOCAL; + int preferred_nid = preferred_zone->node; + int nid = z->node; + enum node_stat_item local_stat = NUMA_LOCAL; /* skip numa counters update if numa stats is disabled */ if (!static_branch_likely(&vm_numa_stat_key)) return; - if (z->node != numa_node_id()) + if (nid != numa_node_id()) local_stat = NUMA_OTHER; - if (z->node == preferred_zone->node) - __inc_numa_state(z, NUMA_HIT); + if (nid == preferred_nid) + inc_node_state(NODE_DATA(nid), NUMA_HIT); else { - __inc_numa_state(z, NUMA_MISS); - __inc_numa_state(preferred_zone, NUMA_FOREIGN); + inc_node_state(NODE_DATA(nid), NUMA_MISS); + inc_node_state(NODE_DATA(preferred_nid), NUMA_FOREIGN); } - __inc_numa_state(z, local_stat); + inc_node_state(NODE_DATA(nid), local_stat); #endif } diff --git a/mm/vmstat.c b/mm/vmstat.c index 40b2db6..1dd12ae 100644 --- a/mm/vmstat.c +++ b/mm/vmstat.c @@ -30,46 +30,44 @@ #include "internal.h" -#define NUMA_STATS_THRESHOLD (U16_MAX - 2) - #ifdef CONFIG_NUMA int sysctl_vm_numa_stat = ENABLE_NUMA_STAT; -/* zero numa counters within a zone */ -static void zero_zone_numa_counters(struct zone *zone) +/* zero numa stats within a node */ +static void zero_node_numa_stats(int node) { int item, cpu; for (item = 0; item < NR_VM_NUMA_STAT_ITEMS; item++) { - atomic_long_set(&zone->vm_numa_stat[item], 0); + atomic_long_set(&(NODE_DATA(node)->vm_stat[item]), 0); for_each_online_cpu(cpu) - per_cpu_ptr(zone->pageset, cpu)->vm_numa_stat_diff[item] - = 0; + per_cpu_ptr(NODE_DATA(node)->per_cpu_nodestats, + cpu)->vm_node_stat_diff[item] = 0; } } -/* zero numa counters of all the populated zones */ -static void zero_zones_numa_counters(void) +/* zero numa stats of all the online nodes */ +static void zero_nodes_numa_stats(void) { - struct zone *zone; + int node; - for_each_populated_zone(zone) - zero_zone_numa_counters(zone); + for_each_online_node(node) + zero_node_numa_stats(node); } -/* zero global numa counters */ -static void zero_global_numa_counters(void) +/* zero global numa stats */ +static void zero_global_numa_stats(void) { int item; for (item = 0; item < NR_VM_NUMA_STAT_ITEMS; item++) - atomic_long_set(&vm_numa_stat[item], 0); + atomic_long_set(&vm_node_stat[item], 0); } static void invalid_numa_statistics(void) { - zero_zones_numa_counters(); - zero_global_numa_counters(); + zero_nodes_numa_stats(); + zero_global_numa_stats(); } static DEFINE_MUTEX(vm_numa_stat_lock); @@ -160,10 +158,8 @@ void vm_events_fold_cpu(int cpu) * vm_stat contains the global counters */ atomic_long_t vm_zone_stat[NR_VM_ZONE_STAT_ITEMS] __cacheline_aligned_in_smp; -atomic_long_t vm_numa_stat[NR_VM_NUMA_STAT_ITEMS] __cacheline_aligned_in_smp; atomic_long_t vm_node_stat[NR_VM_NODE_STAT_ITEMS] __cacheline_aligned_in_smp; EXPORT_SYMBOL(vm_zone_stat); -EXPORT_SYMBOL(vm_numa_stat); EXPORT_SYMBOL(vm_node_stat); #ifdef CONFIG_SMP @@ -679,32 +675,6 @@ EXPORT_SYMBOL(dec_node_page_state); * Fold a differential into the global counters. * Returns the number of counters updated. */ -#ifdef CONFIG_NUMA -static int fold_diff(int *zone_diff, int *numa_diff, int *node_diff) -{ - int i; - int changes = 0; - - for (i = 0; i < NR_VM_ZONE_STAT_ITEMS; i++) - if (zone_diff[i]) { - atomic_long_add(zone_diff[i], &vm_zone_stat[i]); - changes++; - } - - for (i = 0; i < NR_VM_NUMA_STAT_ITEMS; i++) - if (numa_diff[i]) { - atomic_long_add(numa_diff[i], &vm_numa_stat[i]); - changes++; - } - - for (i = 0; i < NR_VM_NODE_STAT_ITEMS; i++) - if (node_diff[i]) { - atomic_long_add(node_diff[i], &vm_node_stat[i]); - changes++; - } - return changes; -} -#else static int fold_diff(int *zone_diff, int *node_diff) { int i; @@ -723,7 +693,6 @@ static int fold_diff(int *zone_diff, int *node_diff) } return changes; } -#endif /* CONFIG_NUMA */ /* * Update the zone counters for the current cpu. @@ -747,9 +716,6 @@ static int refresh_cpu_vm_stats(bool do_pagesets) struct zone *zone; int i; int global_zone_diff[NR_VM_ZONE_STAT_ITEMS] = { 0, }; -#ifdef CONFIG_NUMA - int global_numa_diff[NR_VM_NUMA_STAT_ITEMS] = { 0, }; -#endif int global_node_diff[NR_VM_NODE_STAT_ITEMS] = { 0, }; int changes = 0; @@ -771,18 +737,6 @@ static int refresh_cpu_vm_stats(bool do_pagesets) } } #ifdef CONFIG_NUMA - for (i = 0; i < NR_VM_NUMA_STAT_ITEMS; i++) { - int v; - - v = this_cpu_xchg(p->vm_numa_stat_diff[i], 0); - if (v) { - - atomic_long_add(v, &zone->vm_numa_stat[i]); - global_numa_diff[i] += v; - __this_cpu_write(p->expire, 3); - } - } - if (do_pagesets) { cond_resched(); /* @@ -829,12 +783,7 @@ static int refresh_cpu_vm_stats(bool do_pagesets) } } -#ifdef CONFIG_NUMA - changes += fold_diff(global_zone_diff, global_numa_diff, - global_node_diff); -#else changes += fold_diff(global_zone_diff, global_node_diff); -#endif return changes; } @@ -849,9 +798,6 @@ void cpu_vm_stats_fold(int cpu) struct zone *zone; int i; int global_zone_diff[NR_VM_ZONE_STAT_ITEMS] = { 0, }; -#ifdef CONFIG_NUMA - int global_numa_diff[NR_VM_NUMA_STAT_ITEMS] = { 0, }; -#endif int global_node_diff[NR_VM_NODE_STAT_ITEMS] = { 0, }; for_each_populated_zone(zone) { @@ -868,18 +814,6 @@ void cpu_vm_stats_fold(int cpu) atomic_long_add(v, &zone->vm_stat[i]); global_zone_diff[i] += v; } - -#ifdef CONFIG_NUMA - for (i = 0; i < NR_VM_NUMA_STAT_ITEMS; i++) - if (p->vm_numa_stat_diff[i]) { - int v; - - v = p->vm_numa_stat_diff[i]; - p->vm_numa_stat_diff[i] = 0; - atomic_long_add(v, &zone->vm_numa_stat[i]); - global_numa_diff[i] += v; - } -#endif } for_each_online_pgdat(pgdat) { @@ -898,11 +832,7 @@ void cpu_vm_stats_fold(int cpu) } } -#ifdef CONFIG_NUMA - fold_diff(global_zone_diff, global_numa_diff, global_node_diff); -#else fold_diff(global_zone_diff, global_node_diff); -#endif } /* @@ -920,36 +850,10 @@ void drain_zonestat(struct zone *zone, struct per_cpu_pageset *pset) atomic_long_add(v, &zone->vm_stat[i]); atomic_long_add(v, &vm_zone_stat[i]); } - -#ifdef CONFIG_NUMA - for (i = 0; i < NR_VM_NUMA_STAT_ITEMS; i++) - if (pset->vm_numa_stat_diff[i]) { - int v = pset->vm_numa_stat_diff[i]; - - pset->vm_numa_stat_diff[i] = 0; - atomic_long_add(v, &zone->vm_numa_stat[i]); - atomic_long_add(v, &vm_numa_stat[i]); - } -#endif } #endif #ifdef CONFIG_NUMA -void __inc_numa_state(struct zone *zone, - enum numa_stat_item item) -{ - struct per_cpu_pageset __percpu *pcp = zone->pageset; - u16 __percpu *p = pcp->vm_numa_stat_diff + item; - u16 v; - - v = __this_cpu_inc_return(*p); - - if (unlikely(v > NUMA_STATS_THRESHOLD)) { - zone_numa_state_add(v, zone, item); - __this_cpu_write(*p, 0); - } -} - /* * Determine the per node value of a stat item. This function * is called frequently in a NUMA machine, so try to be as @@ -969,23 +873,6 @@ unsigned long sum_zone_node_page_state(int node, } /* - * Determine the per node value of a numa stat item. To avoid deviation, - * the per cpu stat number in vm_numa_stat_diff[] is also included. - */ -unsigned long sum_zone_numa_state(int node, - enum numa_stat_item item) -{ - struct zone *zones = NODE_DATA(node)->node_zones; - int i; - unsigned long count = 0; - - for (i = 0; i < MAX_NR_ZONES; i++) - count += zone_numa_state_snapshot(zones + i, item); - - return count; -} - -/* * Determine the per node value of a stat item. */ unsigned long node_page_state(struct pglist_data *pgdat, @@ -1569,8 +1456,7 @@ static void zoneinfo_show_print(struct seq_file *m, pg_data_t *pgdat, seq_printf(m, "\n per-node stats"); for (i = 0; i < NR_VM_NODE_STAT_ITEMS; i++) { seq_printf(m, "\n %-12s %lu", - vmstat_text[i + NR_VM_ZONE_STAT_ITEMS + - NR_VM_NUMA_STAT_ITEMS], + vmstat_text[i + NR_VM_ZONE_STAT_ITEMS], node_page_state(pgdat, i)); } } @@ -1607,13 +1493,6 @@ static void zoneinfo_show_print(struct seq_file *m, pg_data_t *pgdat, seq_printf(m, "\n %-12s %lu", vmstat_text[i], zone_page_state(zone, i)); -#ifdef CONFIG_NUMA - for (i = 0; i < NR_VM_NUMA_STAT_ITEMS; i++) - seq_printf(m, "\n %-12s %lu", - vmstat_text[i + NR_VM_ZONE_STAT_ITEMS], - zone_numa_state_snapshot(zone, i)); -#endif - seq_printf(m, "\n pagesets"); for_each_online_cpu(i) { struct per_cpu_pageset *pageset; @@ -1688,7 +1567,6 @@ static void *vmstat_start(struct seq_file *m, loff_t *pos) if (*pos >= ARRAY_SIZE(vmstat_text)) return NULL; stat_items_size = NR_VM_ZONE_STAT_ITEMS * sizeof(unsigned long) + - NR_VM_NUMA_STAT_ITEMS * sizeof(unsigned long) + NR_VM_NODE_STAT_ITEMS * sizeof(unsigned long) + NR_VM_WRITEBACK_STAT_ITEMS * sizeof(unsigned long); @@ -1704,12 +1582,6 @@ static void *vmstat_start(struct seq_file *m, loff_t *pos) v[i] = global_zone_page_state(i); v += NR_VM_ZONE_STAT_ITEMS; -#ifdef CONFIG_NUMA - for (i = 0; i < NR_VM_NUMA_STAT_ITEMS; i++) - v[i] = global_numa_state(i); - v += NR_VM_NUMA_STAT_ITEMS; -#endif - for (i = 0; i < NR_VM_NODE_STAT_ITEMS; i++) v[i] = global_node_page_state(i); v += NR_VM_NODE_STAT_ITEMS; @@ -1811,16 +1683,6 @@ int vmstat_refresh(struct ctl_table *table, int write, err = -EINVAL; } } -#ifdef CONFIG_NUMA - for (i = 0; i < NR_VM_NUMA_STAT_ITEMS; i++) { - val = atomic_long_read(&vm_numa_stat[i]); - if (val < 0) { - pr_warn("%s: %s %ld\n", - __func__, vmstat_text[i + NR_VM_ZONE_STAT_ITEMS], val); - err = -EINVAL; - } - } -#endif if (err) return err; if (write) @@ -1862,9 +1724,6 @@ static bool need_update(int cpu) struct per_cpu_pageset *p = per_cpu_ptr(zone->pageset, cpu); BUILD_BUG_ON(sizeof(p->vm_stat_diff[0]) != 1); -#ifdef CONFIG_NUMA - BUILD_BUG_ON(sizeof(p->vm_numa_stat_diff[0]) != 2); -#endif /* * The fast way of checking if there are any vmstat diffs. @@ -1872,10 +1731,6 @@ static bool need_update(int cpu) */ if (memchr_inv(p->vm_stat_diff, 0, NR_VM_ZONE_STAT_ITEMS)) return true; -#ifdef CONFIG_NUMA - if (memchr_inv(p->vm_numa_stat_diff, 0, NR_VM_NUMA_STAT_ITEMS)) - return true; -#endif } return false; } -- 2.7.4