Viewing file:  sys_devices_system_node.c (6.12 KB) -rw-r--r--
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// 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 || netdata_zero_metrics_enabled == CONFIG_BOOLEAN_YES))) {
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;
}
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