summaryrefslogtreecommitdiffstats
path: root/collectors/proc.plugin/sys_devices_system_node.c
blob: 6e6d0acca3b9bf8b68f26c750d2317dde1dc864d (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
// SPDX-License-Identifier: GPL-3.0-or-later

#include "plugin_proc.h"

struct node {
    char *name;
    char *numastat_filename;
    procfile *numastat_ff;
    RRDSET *numastat_st;
    struct node *next;
};
static struct node *numa_root = NULL;

static int find_all_nodes() {
    int numa_node_count = 0;
    char name[FILENAME_MAX + 1];
    snprintfz(name, FILENAME_MAX, "%s%s", netdata_configured_host_prefix, "/sys/devices/system/node");
    char *dirname = config_get("plugin:proc:/sys/devices/system/node", "directory to monitor", name);

    DIR *dir = opendir(dirname);
    if(!dir) {
        error("Cannot read NUMA node directory '%s'", dirname);
        return 0;
    }

    struct dirent *de = NULL;
    while((de = readdir(dir))) {
        if(de->d_type != DT_DIR)
            continue;

        if(strncmp(de->d_name, "node", 4) != 0)
            continue;

        if(!isdigit(de->d_name[4]))
            continue;

        numa_node_count++;

        struct node *m = callocz(1, sizeof(struct node));
        m->name = strdupz(de->d_name);

        struct stat st;

        snprintfz(name, FILENAME_MAX, "%s/%s/numastat", dirname, de->d_name);
        if(stat(name, &st) == -1) {
            freez(m->name);
            freez(m);
            continue;
        }

        m->numastat_filename = strdupz(name);

        m->next = numa_root;
        numa_root = m;
    }

    closedir(dir);

    return numa_node_count;
}

int do_proc_sys_devices_system_node(int update_every, usec_t dt) {
    (void)dt;

    static uint32_t hash_local_node = 0, hash_numa_foreign = 0, hash_interleave_hit = 0, hash_other_node = 0, hash_numa_hit = 0, hash_numa_miss = 0;
    static int do_numastat = -1, numa_node_count = 0;
    struct node *m;

    if(unlikely(numa_root == NULL)) {
        numa_node_count = find_all_nodes();
        if(unlikely(numa_root == NULL))
            return 1;
    }

    if(unlikely(do_numastat == -1)) {
        do_numastat = config_get_boolean_ondemand("plugin:proc:/sys/devices/system/node", "enable per-node numa metrics", CONFIG_BOOLEAN_AUTO);

        hash_local_node     = simple_hash("local_node");
        hash_numa_foreign   = simple_hash("numa_foreign");
        hash_interleave_hit = simple_hash("interleave_hit");
        hash_other_node     = simple_hash("other_node");
        hash_numa_hit       = simple_hash("numa_hit");
        hash_numa_miss      = simple_hash("numa_miss");
    }

    if(do_numastat == CONFIG_BOOLEAN_YES || (do_numastat == CONFIG_BOOLEAN_AUTO && numa_node_count >= 2)) {
        for(m = numa_root; m; m = m->next) {
            if(m->numastat_filename) {

                if(unlikely(!m->numastat_ff)) {
                    m->numastat_ff = procfile_open(m->numastat_filename, " ", PROCFILE_FLAG_DEFAULT);

                    if(unlikely(!m->numastat_ff))
                        continue;
                }

                m->numastat_ff = procfile_readall(m->numastat_ff);
                if(unlikely(!m->numastat_ff || procfile_lines(m->numastat_ff) < 1 || procfile_linewords(m->numastat_ff, 0) < 1))
                    continue;

                if(unlikely(!m->numastat_st)) {
                    m->numastat_st = rrdset_create_localhost(
                            "mem"
                            , m->name
                            , NULL
                            , "numa"
                            , NULL
                            , "NUMA events"
                            , "events/s"
                            , PLUGIN_PROC_NAME
                            , "/sys/devices/system/node"
                            , NETDATA_CHART_PRIO_MEM_NUMA_NODES
                            , update_every
                            , RRDSET_TYPE_LINE
                    );

                    rrdset_flag_set(m->numastat_st, RRDSET_FLAG_DETAIL);

                    rrddim_add(m->numastat_st, "numa_hit",       "hit",        1, 1, RRD_ALGORITHM_INCREMENTAL);
                    rrddim_add(m->numastat_st, "numa_miss",      "miss",       1, 1, RRD_ALGORITHM_INCREMENTAL);
                    rrddim_add(m->numastat_st, "local_node",     "local",      1, 1, RRD_ALGORITHM_INCREMENTAL);
                    rrddim_add(m->numastat_st, "numa_foreign",   "foreign",    1, 1, RRD_ALGORITHM_INCREMENTAL);
                    rrddim_add(m->numastat_st, "interleave_hit", "interleave", 1, 1, RRD_ALGORITHM_INCREMENTAL);
                    rrddim_add(m->numastat_st, "other_node",     "other",      1, 1, RRD_ALGORITHM_INCREMENTAL);

                }
                else rrdset_next(m->numastat_st);

                size_t lines = procfile_lines(m->numastat_ff), l;
                for(l = 0; l < lines; l++) {
                    size_t words = procfile_linewords(m->numastat_ff, l);

                    if(unlikely(words < 2)) {
                        if(unlikely(words))
                            error("Cannot read %s numastat line %zu. Expected 2 params, read %zu.", m->name, l, words);
                        continue;
                    }

                    char *name  = procfile_lineword(m->numastat_ff, l, 0);
                    char *value = procfile_lineword(m->numastat_ff, l, 1);

                    if (unlikely(!name || !*name || !value || !*value))
                        continue;

                    uint32_t hash = simple_hash(name);
                    if(likely(
                               (hash == hash_numa_hit       && !strcmp(name, "numa_hit"))
                            || (hash == hash_numa_miss      && !strcmp(name, "numa_miss"))
                            || (hash == hash_local_node     && !strcmp(name, "local_node"))
                            || (hash == hash_numa_foreign   && !strcmp(name, "numa_foreign"))
                            || (hash == hash_interleave_hit && !strcmp(name, "interleave_hit"))
                            || (hash == hash_other_node     && !strcmp(name, "other_node"))
                    ))
                        rrddim_set(m->numastat_st, name, (collected_number)str2kernel_uint_t(value));
                }

                rrdset_done(m->numastat_st);
            }
        }
    }

    return 0;
}