Mercurial > archived > louis > perso > liblxcstats

comparison probes/memory.c @ 9:6f2e13f5fcfd

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Add the memory probe
author Louis Opter <louis@dotcloud.com>
date Sun, 02 Jan 2011 01:50:27 +0100
parents
children 3a1977ecccc7
comparison
equal deleted inserted replaced
8:fe254ba0818d 9:6f2e13f5fcfd
1 #include <sys/types.h>
2
3 #include <assert.h>
4 #include <errno.h>
5 #include <limits.h>
6 #include <stdlib.h>
7 #include <string.h>
8
9 #include "lxcstats.h"
10 #include "_lxcstats.h"
11
12 static int
13 read_stat(struct lxcst *c)
14 {
15 char path[PATH_MAX];
16 char *values;
17 char *fields[12];
18 int ret;
19
20 _lxcst_join_path(path, sizeof(path), c->cgroup_dir, "memory.stat");
21 ret = _lxcst_read_file(path, &values);
22 if (ret > 0) {
23 values[ret - 1] = '\0'; /* Replace the last \n by a \0 */
24 if (_lxcst_strsplit(values, fields, ARRAY_SIZE(fields)) == ARRAY_SIZE(fields)) {
25 errno = 0;
26 c->memory.cached = strtoull(fields[1], NULL, 10);
27 c->memory.used = strtoull(fields[3], NULL, 10);
28 c->memory.mapped = strtoull(fields[5], NULL, 10);
29 c->memory.swapped = strtoull(fields[11], NULL, 10);
30 if (!errno) {
31 free(values);
32 return (0);
33 }
34 }
35 free(values);
36 }
37
38 memset(&c->memory, 0, sizeof(c->memory));
39 return (-1);
40 }
41
42 int
43 _lxcst_probe_memory(struct lxcst *c)
44 {
45 assert(c);
46
47 return (read_stat(c));
48 }