2 * collectd - src/zone.c
3 * Copyright (C) 2011 Mathijs Mohlmann
5 * This program is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License as published by the
7 * Free Software Foundation; only version 2 of the License is applicable.
9 * This program is distributed in the hope that it will be useful, but
10 * WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * General Public License for more details.
14 * You should have received a copy of the GNU General Public License along
15 * with this program; if not, write to the Free Software Foundation, Inc.,
16 * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
28 #include <sys/types.h>
29 #include <sys/vm_usage.h>
33 #include "utils_avltree.h"
35 #define MAX_PROCFS_PATH 40
36 #define FRC2PCT(pp)(((float)(pp))/0x8000*100)
38 typedef struct zone_stats {
46 zone_compare(const zoneid_t *a, const zoneid_t *b)
56 zone_read_procfile(char *pidstr, char *file, void *buf, size_t bufsize)
60 char procfile[MAX_PROCFS_PATH];
61 (void)snprintf(procfile, MAX_PROCFS_PATH, "/proc/%s/%s", pidstr, file);
62 while ((fd = open(procfile, O_RDONLY)) == -1) {
63 if ((errno != EMFILE) || (errno != ENFILE)) {
68 if (pread(fd, buf, bufsize, 0) != bufsize) {
77 zone_submit_value(char *zone, gauge_t value)
79 value_list_t vl = VALUE_LIST_INIT;
82 values[0].gauge = value;
85 vl.values_len = 1; /*STATIC_ARRAY_SIZE (values);*/
86 sstrncpy (vl.host, hostname_g, sizeof (vl.host));
87 sstrncpy (vl.plugin, "zone", sizeof (vl.plugin));
88 sstrncpy (vl.type, "percent", sizeof (vl.type));
89 sstrncpy (vl.type_instance, zone, sizeof (vl.type_instance));
91 return(plugin_dispatch_values (&vl));
95 zone_find_stats(c_avl_tree_t *tree, zoneid_t zoneid)
97 zone_stats_t *ret = NULL;
100 if (c_avl_get(tree, (void **)&zoneid, (void **)&ret)) {
101 if (!(ret = malloc(sizeof(zone_stats_t)))) {
102 WARNING("zone plugin: no memory");
105 if (!(key = malloc(sizeof(zoneid_t)))) {
106 WARNING("zone plugin: no memory");
110 if (c_avl_insert(tree, key, ret)) {
111 WARNING("zone plugin: error inserting into tree");
119 zone_submit_values(c_avl_tree_t *tree)
121 char zonename[ZONENAME_MAX];
122 zoneid_t *zoneid = NULL;
123 zone_stats_t *stats = NULL;
125 while (c_avl_pick (tree, (void **)&zoneid, (void **)&stats) == 0)
127 if (getzonenamebyid(*zoneid, zonename, sizeof( zonename )) == -1) {
128 WARNING("zone plugin: error retreiving zonename");
130 zone_submit_value(zonename, (gauge_t)FRC2PCT(stats->pctcpu));
138 static c_avl_tree_t *
139 zone_scandir(DIR *procdir)
147 /* size_t physmem = sysconf(_SC_PHYS_PAGES) * pagesize;*/
149 if (!(tree=c_avl_create((void *) zone_compare))) {
150 WARNING("zone plugin: Failed to create tree");
154 for (rewinddir(procdir); (direntp = readdir(procdir)); ) {
155 pidstr = direntp->d_name;
156 if (pidstr[0] == '.') /* skip "." and ".." */
159 if (pid == 0 || pid == 2 || pid == 3)
160 continue; /* skip sched, pageout and fsflush */
161 if (zone_read_procfile(pidstr, "psinfo", &psinfo,
162 sizeof(psinfo_t)) != 0)
164 stats = zone_find_stats(tree, psinfo.pr_zoneid);
166 stats->pctcpu += psinfo.pr_pctcpu;
167 stats->pctmem += psinfo.pr_pctmem;
174 static int zone_read (void)
179 pagesize = sysconf(_SC_PAGESIZE);
180 if ((procdir = opendir("/proc")) == NULL) {
181 ERROR("zone plugin: cannot open /proc directory\n");
185 tree=zone_scandir(procdir);
187 zone_submit_values(tree); /* this also frees tree */
191 void module_register (void)
193 plugin_register_read ("zone", zone_read);
194 } /* void module_register */