diff options
Diffstat (limited to 'collectors/proc.plugin/sys_devices_system_node.c')
| -rw-r--r-- | collectors/proc.plugin/sys_devices_system_node.c | 163 |
1 files changed, 163 insertions, 0 deletions
diff --git a/collectors/proc.plugin/sys_devices_system_node.c b/collectors/proc.plugin/sys_devices_system_node.c new file mode 100644 index 000000000..6e6d0acca --- /dev/null +++ b/collectors/proc.plugin/sys_devices_system_node.c @@ -0,0 +1,163 @@ +// 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; +} |