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mm: memcg: print statistics from live counters
Directly print statistics and event counters instead of going through an intermediate accumulation stage into a separate array, which used to require defining statistic items in more than one place. [akpm@linux-foundation.org: checkpatch fixes] Signed-off-by: Johannes Weiner <hannes@cmpxchg.org> Acked-by: Michal Hocko <mhocko@suse.cz> Acked-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Cc: Ying Han <yinghan@google.com> Cc: Tejun Heo <tj@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Johannes Weiner
Linus Torvalds
parent
fad02c2de0
commit
af7c4b0ec2
168
mm/memcontrol.c
168
mm/memcontrol.c
@ -91,6 +91,13 @@ enum mem_cgroup_stat_index {
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MEM_CGROUP_STAT_NSTATS,
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};
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static const char * const mem_cgroup_stat_names[] = {
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"cache",
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"rss",
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"mapped_file",
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"swap",
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};
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enum mem_cgroup_events_index {
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MEM_CGROUP_EVENTS_PGPGIN, /* # of pages paged in */
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MEM_CGROUP_EVENTS_PGPGOUT, /* # of pages paged out */
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@ -98,6 +105,14 @@ enum mem_cgroup_events_index {
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MEM_CGROUP_EVENTS_PGMAJFAULT, /* # of major page-faults */
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MEM_CGROUP_EVENTS_NSTATS,
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};
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static const char * const mem_cgroup_events_names[] = {
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"pgpgin",
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"pgpgout",
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"pgfault",
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"pgmajfault",
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};
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/*
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* Per memcg event counter is incremented at every pagein/pageout. With THP,
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* it will be incremated by the number of pages. This counter is used for
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@ -4037,92 +4052,6 @@ static int mem_cgroup_move_charge_write(struct cgroup *cgrp,
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}
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#endif
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/* For read statistics */
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enum {
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MCS_CACHE,
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MCS_RSS,
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MCS_FILE_MAPPED,
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MCS_SWAP,
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MCS_PGPGIN,
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MCS_PGPGOUT,
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MCS_PGFAULT,
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MCS_PGMAJFAULT,
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MCS_INACTIVE_ANON,
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MCS_ACTIVE_ANON,
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MCS_INACTIVE_FILE,
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MCS_ACTIVE_FILE,
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MCS_UNEVICTABLE,
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NR_MCS_STAT,
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};
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struct mcs_total_stat {
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s64 stat[NR_MCS_STAT];
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};
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static const char *memcg_stat_strings[NR_MCS_STAT] = {
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"cache",
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"rss",
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"mapped_file",
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"swap",
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"pgpgin",
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"pgpgout",
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"pgfault",
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"pgmajfault",
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"inactive_anon",
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"active_anon",
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"inactive_file",
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"active_file",
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"unevictable",
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};
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static void
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mem_cgroup_get_local_stat(struct mem_cgroup *memcg, struct mcs_total_stat *s)
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{
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s64 val;
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/* per cpu stat */
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val = mem_cgroup_read_stat(memcg, MEM_CGROUP_STAT_CACHE);
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s->stat[MCS_CACHE] += val * PAGE_SIZE;
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val = mem_cgroup_read_stat(memcg, MEM_CGROUP_STAT_RSS);
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s->stat[MCS_RSS] += val * PAGE_SIZE;
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val = mem_cgroup_read_stat(memcg, MEM_CGROUP_STAT_FILE_MAPPED);
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s->stat[MCS_FILE_MAPPED] += val * PAGE_SIZE;
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val = mem_cgroup_read_events(memcg, MEM_CGROUP_EVENTS_PGPGIN);
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s->stat[MCS_PGPGIN] += val;
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val = mem_cgroup_read_events(memcg, MEM_CGROUP_EVENTS_PGPGOUT);
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s->stat[MCS_PGPGOUT] += val;
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if (do_swap_account) {
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val = mem_cgroup_read_stat(memcg, MEM_CGROUP_STAT_SWAPOUT);
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s->stat[MCS_SWAP] += val * PAGE_SIZE;
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}
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val = mem_cgroup_read_events(memcg, MEM_CGROUP_EVENTS_PGFAULT);
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s->stat[MCS_PGFAULT] += val;
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val = mem_cgroup_read_events(memcg, MEM_CGROUP_EVENTS_PGMAJFAULT);
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s->stat[MCS_PGMAJFAULT] += val;
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/* per zone stat */
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val = mem_cgroup_nr_lru_pages(memcg, BIT(LRU_INACTIVE_ANON));
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s->stat[MCS_INACTIVE_ANON] += val * PAGE_SIZE;
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val = mem_cgroup_nr_lru_pages(memcg, BIT(LRU_ACTIVE_ANON));
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s->stat[MCS_ACTIVE_ANON] += val * PAGE_SIZE;
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val = mem_cgroup_nr_lru_pages(memcg, BIT(LRU_INACTIVE_FILE));
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s->stat[MCS_INACTIVE_FILE] += val * PAGE_SIZE;
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val = mem_cgroup_nr_lru_pages(memcg, BIT(LRU_ACTIVE_FILE));
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s->stat[MCS_ACTIVE_FILE] += val * PAGE_SIZE;
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val = mem_cgroup_nr_lru_pages(memcg, BIT(LRU_UNEVICTABLE));
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s->stat[MCS_UNEVICTABLE] += val * PAGE_SIZE;
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}
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static void
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mem_cgroup_get_total_stat(struct mem_cgroup *memcg, struct mcs_total_stat *s)
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{
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struct mem_cgroup *iter;
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for_each_mem_cgroup_tree(iter, memcg)
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mem_cgroup_get_local_stat(iter, s);
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}
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#ifdef CONFIG_NUMA
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static int mem_control_numa_stat_show(struct cgroup *cont, struct cftype *cft,
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struct seq_file *m)
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@ -4170,24 +4099,41 @@ static int mem_control_numa_stat_show(struct cgroup *cont, struct cftype *cft,
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}
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#endif /* CONFIG_NUMA */
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static const char * const mem_cgroup_lru_names[] = {
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"inactive_anon",
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"active_anon",
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"inactive_file",
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"active_file",
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"unevictable",
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};
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static inline void mem_cgroup_lru_names_not_uptodate(void)
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{
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BUILD_BUG_ON(ARRAY_SIZE(mem_cgroup_lru_names) != NR_LRU_LISTS);
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}
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static int mem_control_stat_show(struct cgroup *cont, struct cftype *cft,
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struct seq_file *m)
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{
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struct mem_cgroup *memcg = mem_cgroup_from_cont(cont);
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struct mcs_total_stat mystat;
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int i;
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struct mem_cgroup *mi;
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unsigned int i;
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memset(&mystat, 0, sizeof(mystat));
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mem_cgroup_get_local_stat(memcg, &mystat);
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for (i = 0; i < NR_MCS_STAT; i++) {
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if (i == MCS_SWAP && !do_swap_account)
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for (i = 0; i < MEM_CGROUP_STAT_NSTATS; i++) {
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if (i == MEM_CGROUP_STAT_SWAPOUT && !do_swap_account)
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continue;
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seq_printf(m, "%s %llu\n", memcg_stat_strings[i],
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(unsigned long long)mystat.stat[i]);
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seq_printf(m, "%s %ld\n", mem_cgroup_stat_names[i],
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mem_cgroup_read_stat(memcg, i) * PAGE_SIZE);
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}
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for (i = 0; i < MEM_CGROUP_EVENTS_NSTATS; i++)
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seq_printf(m, "%s %lu\n", mem_cgroup_events_names[i],
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mem_cgroup_read_events(memcg, i));
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for (i = 0; i < NR_LRU_LISTS; i++)
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seq_printf(m, "%s %lu\n", mem_cgroup_lru_names[i],
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mem_cgroup_nr_lru_pages(memcg, BIT(i)) * PAGE_SIZE);
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/* Hierarchical information */
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{
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unsigned long long limit, memsw_limit;
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@ -4198,13 +4144,31 @@ static int mem_control_stat_show(struct cgroup *cont, struct cftype *cft,
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memsw_limit);
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}
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memset(&mystat, 0, sizeof(mystat));
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mem_cgroup_get_total_stat(memcg, &mystat);
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for (i = 0; i < NR_MCS_STAT; i++) {
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if (i == MCS_SWAP && !do_swap_account)
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for (i = 0; i < MEM_CGROUP_STAT_NSTATS; i++) {
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long long val = 0;
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if (i == MEM_CGROUP_STAT_SWAPOUT && !do_swap_account)
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continue;
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seq_printf(m, "total_%s %llu\n", memcg_stat_strings[i],
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(unsigned long long)mystat.stat[i]);
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for_each_mem_cgroup_tree(mi, memcg)
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val += mem_cgroup_read_stat(mi, i) * PAGE_SIZE;
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seq_printf(m, "total_%s %lld\n", mem_cgroup_stat_names[i], val);
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}
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for (i = 0; i < MEM_CGROUP_EVENTS_NSTATS; i++) {
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unsigned long long val = 0;
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for_each_mem_cgroup_tree(mi, memcg)
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val += mem_cgroup_read_events(mi, i);
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seq_printf(m, "total_%s %llu\n",
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mem_cgroup_events_names[i], val);
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}
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for (i = 0; i < NR_LRU_LISTS; i++) {
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unsigned long long val = 0;
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for_each_mem_cgroup_tree(mi, memcg)
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val += mem_cgroup_nr_lru_pages(mi, BIT(i)) * PAGE_SIZE;
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seq_printf(m, "total_%s %llu\n", mem_cgroup_lru_names[i], val);
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}
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#ifdef CONFIG_DEBUG_VM
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