1 /**
2 * collectd - src/swap.c
3 * Copyright (C) 2005-2014 Florian octo Forster
4 * Copyright (C) 2009 Stefan Völkel
5 * Copyright (C) 2009 Manuel Sanmartin
6 * Copyright (C) 2010 Aurélien Reynaud
7 *
8 * This program is free software; you can redistribute it and/or modify it
9 * under the terms of the GNU General Public License as published by the
10 * Free Software Foundation; only version 2 of the License is applicable.
11 *
12 * This program is distributed in the hope that it will be useful, but
13 * WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License along
18 * with this program; if not, write to the Free Software Foundation, Inc.,
19 * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
20 *
21 * Authors:
22 * Florian octo Forster <octo at collectd.org>
23 * Manuel Sanmartin
24 * Aurélien Reynaud <collectd at wattapower.net>
25 **/
27 #if HAVE_CONFIG_H
28 # include "config.h"
29 # undef HAVE_CONFIG_H
30 #endif
31 /* avoid swap.h error "Cannot use swapctl in the large files compilation environment" */
32 #if HAVE_SYS_SWAP_H && !defined(_LP64) && _FILE_OFFSET_BITS == 64
33 # undef _FILE_OFFSET_BITS
34 # undef _LARGEFILE64_SOURCE
35 #endif
37 #include "collectd.h"
39 #include "common.h"
40 #include "plugin.h"
42 #if HAVE_SYS_SWAP_H
43 # include <sys/swap.h>
44 #endif
45 #if HAVE_VM_ANON_H
46 # include <vm/anon.h>
47 #endif
48 #if HAVE_SYS_PARAM_H
49 # include <sys/param.h>
50 #endif
51 #if HAVE_SYS_SYSCTL_H
52 # include <sys/sysctl.h>
53 #endif
54 #if HAVE_SYS_DKSTAT_H
55 # include <sys/dkstat.h>
56 #endif
57 #if HAVE_KVM_H
58 # include <kvm.h>
59 #endif
61 #if HAVE_STATGRAB_H
62 # include <statgrab.h>
63 #endif
65 #if HAVE_PERFSTAT
66 # include <sys/protosw.h>
67 # include <libperfstat.h>
68 #endif
70 #undef MAX
71 #define MAX(x,y) ((x) > (y) ? (x) : (y))
73 #if KERNEL_LINUX
74 # define SWAP_HAVE_REPORT_BY_DEVICE 1
75 static derive_t pagesize;
76 static _Bool report_bytes = 0;
77 static _Bool report_by_device = 0;
78 /* #endif KERNEL_LINUX */
80 #elif HAVE_SWAPCTL && HAVE_SWAPCTL_TWO_ARGS
81 # define SWAP_HAVE_REPORT_BY_DEVICE 1
82 static derive_t pagesize;
83 static _Bool report_by_device = 0;
84 /* #endif HAVE_SWAPCTL && HAVE_SWAPCTL_TWO_ARGS */
86 #elif HAVE_SWAPCTL && HAVE_SWAPCTL_THREE_ARGS
87 /* No global variables */
88 /* #endif HAVE_SWAPCTL && HAVE_SWAPCTL_THREE_ARGS */
90 #elif defined(VM_SWAPUSAGE)
91 /* No global variables */
92 /* #endif defined(VM_SWAPUSAGE) */
94 #elif HAVE_LIBKVM_GETSWAPINFO
95 static kvm_t *kvm_obj = NULL;
96 int kvm_pagesize;
97 /* #endif HAVE_LIBKVM_GETSWAPINFO */
99 #elif HAVE_LIBSTATGRAB
100 /* No global variables */
101 /* #endif HAVE_LIBSTATGRAB */
103 #elif HAVE_PERFSTAT
104 static int pagesize;
105 /*# endif HAVE_PERFSTAT */
107 #else
108 # error "No applicable input method."
109 #endif /* HAVE_LIBSTATGRAB */
111 static _Bool values_absolute = 1;
112 static _Bool values_percentage = 0;
114 static int swap_config (oconfig_item_t *ci) /* {{{ */
115 {
116 int i;
118 for (i = 0; i < ci->children_num; i++)
119 {
120 oconfig_item_t *child = ci->children + i;
121 if (strcasecmp ("ReportBytes", child->key) == 0)
122 #if KERNEL_LINUX
123 cf_util_get_boolean (child, &report_bytes);
124 #else
125 WARNING ("swap plugin: The \"ReportBytes\" option "
126 "is only valid under Linux. "
127 "The option is going to be ignored.");
128 #endif
129 else if (strcasecmp ("ReportByDevice", child->key) == 0)
130 #if SWAP_HAVE_REPORT_BY_DEVICE
131 cf_util_get_boolean (child, &report_by_device);
132 #else
133 WARNING ("swap plugin: The \"ReportByDevice\" option "
134 "is not supported on this platform. "
135 "The option is going to be ignored.");
136 #endif /* SWAP_HAVE_REPORT_BY_DEVICE */
137 else if (strcasecmp ("ValuesAbsolute", child->key) == 0)
138 cf_util_get_boolean (child, &values_absolute);
139 else if (strcasecmp ("ValuesPercentage", child->key) == 0)
140 cf_util_get_boolean (child, &values_percentage);
141 else
142 WARNING ("swap plugin: Unknown config option: \"%s\"",
143 child->key);
144 }
146 return (0);
147 } /* }}} int swap_config */
149 static int swap_init (void) /* {{{ */
150 {
151 #if KERNEL_LINUX
152 pagesize = (derive_t) sysconf (_SC_PAGESIZE);
153 /* #endif KERNEL_LINUX */
155 #elif HAVE_SWAPCTL && HAVE_SWAPCTL_TWO_ARGS
156 /* getpagesize(3C) tells me this does not fail.. */
157 pagesize = (derive_t) getpagesize ();
158 /* #endif HAVE_SWAPCTL */
160 #elif defined(VM_SWAPUSAGE)
161 /* No init stuff */
162 /* #endif defined(VM_SWAPUSAGE) */
164 #elif HAVE_LIBKVM_GETSWAPINFO
165 char errbuf[_POSIX2_LINE_MAX];
167 if (kvm_obj != NULL)
168 {
169 kvm_close (kvm_obj);
170 kvm_obj = NULL;
171 }
173 kvm_pagesize = getpagesize ();
175 kvm_obj = kvm_openfiles (NULL, "/dev/null", NULL, O_RDONLY, errbuf);
177 if (kvm_obj == NULL)
178 {
179 ERROR ("swap plugin: kvm_openfiles failed, %s", errbuf);
180 return (-1);
181 }
182 /* #endif HAVE_LIBKVM_GETSWAPINFO */
184 #elif HAVE_LIBSTATGRAB
185 /* No init stuff */
186 /* #endif HAVE_LIBSTATGRAB */
188 #elif HAVE_PERFSTAT
189 pagesize = getpagesize();
190 #endif /* HAVE_PERFSTAT */
192 return (0);
193 } /* }}} int swap_init */
195 static void swap_submit_usage (char const *plugin_instance, /* {{{ */
196 gauge_t used, gauge_t free,
197 char const *other_name, gauge_t other_value)
198 {
199 value_t v[1];
200 value_list_t vl = VALUE_LIST_INIT;
202 vl.values = v;
203 vl.values_len = STATIC_ARRAY_SIZE (v);
204 sstrncpy (vl.host, hostname_g, sizeof (vl.host));
205 sstrncpy (vl.plugin, "swap", sizeof (vl.plugin));
206 if (plugin_instance != NULL)
207 sstrncpy (vl.plugin_instance, plugin_instance,
208 sizeof (vl.plugin_instance));
209 sstrncpy (vl.type, "swap", sizeof (vl.type));
211 if (values_absolute)
212 plugin_dispatch_multivalue (&vl, 0, DS_TYPE_GAUGE,
213 "used", used, "free", free,
214 other_name, other_value, NULL);
215 if (values_percentage)
216 plugin_dispatch_multivalue (&vl, 1, DS_TYPE_GAUGE,
217 "used", used, "free", free,
218 other_name, other_value, NULL);
219 } /* }}} void swap_submit_usage */
221 #if KERNEL_LINUX || HAVE_PERFSTAT
222 __attribute__((nonnull(1)))
223 static void swap_submit_derive (char const *type_instance, /* {{{ */
224 derive_t value)
225 {
226 value_list_t vl = VALUE_LIST_INIT;
227 value_t v[1];
229 v[0].derive = value;
231 vl.values = v;
232 vl.values_len = STATIC_ARRAY_SIZE (v);
233 sstrncpy (vl.host, hostname_g, sizeof (vl.host));
234 sstrncpy (vl.plugin, "swap", sizeof (vl.plugin));
235 sstrncpy (vl.type, "swap_io", sizeof (vl.type));
236 sstrncpy (vl.type_instance, type_instance, sizeof (vl.type_instance));
238 plugin_dispatch_values (&vl);
239 } /* }}} void swap_submit_derive */
240 #endif
242 #if KERNEL_LINUX
243 static int swap_read_separate (void) /* {{{ */
244 {
245 FILE *fh;
246 char buffer[1024];
248 fh = fopen ("/proc/swaps", "r");
249 if (fh == NULL)
250 {
251 char errbuf[1024];
252 WARNING ("swap plugin: fopen (/proc/swaps) failed: %s",
253 sstrerror (errno, errbuf, sizeof (errbuf)));
254 return (-1);
255 }
257 while (fgets (buffer, sizeof (buffer), fh) != NULL)
258 {
259 char *fields[8];
260 int numfields;
261 char *endptr;
263 char path[PATH_MAX];
264 gauge_t total;
265 gauge_t used;
267 numfields = strsplit (buffer, fields, STATIC_ARRAY_SIZE (fields));
268 if (numfields != 5)
269 continue;
271 sstrncpy (path, fields[0], sizeof (path));
272 escape_slashes (path, sizeof (path));
274 errno = 0;
275 endptr = NULL;
276 total = strtod (fields[2], &endptr);
277 if ((endptr == fields[2]) || (errno != 0))
278 continue;
280 errno = 0;
281 endptr = NULL;
282 used = strtod (fields[3], &endptr);
283 if ((endptr == fields[3]) || (errno != 0))
284 continue;
286 if (total < used)
287 continue;
289 swap_submit_usage (path, used * 1024.0, (total - used) * 1024.0,
290 NULL, NAN);
291 }
293 fclose (fh);
295 return (0);
296 } /* }}} int swap_read_separate */
298 static int swap_read_combined (void) /* {{{ */
299 {
300 FILE *fh;
301 char buffer[1024];
303 gauge_t swap_used = NAN;
304 gauge_t swap_cached = NAN;
305 gauge_t swap_free = NAN;
306 gauge_t swap_total = NAN;
308 fh = fopen ("/proc/meminfo", "r");
309 if (fh == NULL)
310 {
311 char errbuf[1024];
312 WARNING ("swap plugin: fopen (/proc/meminfo) failed: %s",
313 sstrerror (errno, errbuf, sizeof (errbuf)));
314 return (-1);
315 }
317 while (fgets (buffer, sizeof (buffer), fh) != NULL)
318 {
319 char *fields[8];
320 int numfields;
322 numfields = strsplit (buffer, fields, STATIC_ARRAY_SIZE (fields));
323 if (numfields < 2)
324 continue;
326 if (strcasecmp (fields[0], "SwapTotal:") == 0)
327 strtogauge (fields[1], &swap_total);
328 else if (strcasecmp (fields[0], "SwapFree:") == 0)
329 strtogauge (fields[1], &swap_free);
330 else if (strcasecmp (fields[0], "SwapCached:") == 0)
331 strtogauge (fields[1], &swap_cached);
332 }
334 fclose (fh);
336 if (isnan (swap_total) || isnan (swap_free))
337 return (ENOENT);
339 /* Some systems, OpenVZ for example, don't provide SwapCached. */
340 if (isnan (swap_cached))
341 swap_used = swap_total - swap_free;
342 else
343 swap_used = swap_total - (swap_free + swap_cached);
344 assert (!isnan (swap_used));
346 if (swap_used < 0.0)
347 return (EINVAL);
349 swap_submit_usage (NULL, swap_used * 1024.0, swap_free * 1024.0,
350 isnan (swap_cached) ? NULL : "cached",
351 isnan (swap_cached) ? NAN : swap_cached * 1024.0);
352 return (0);
353 } /* }}} int swap_read_combined */
355 static int swap_read_io (void) /* {{{ */
356 {
357 FILE *fh;
358 char buffer[1024];
360 _Bool old_kernel = 0;
362 uint8_t have_data = 0;
363 derive_t swap_in = 0;
364 derive_t swap_out = 0;
366 fh = fopen ("/proc/vmstat", "r");
367 if (fh == NULL)
368 {
369 /* /proc/vmstat does not exist in kernels <2.6 */
370 fh = fopen ("/proc/stat", "r");
371 if (fh == NULL)
372 {
373 char errbuf[1024];
374 WARNING ("swap: fopen: %s",
375 sstrerror (errno, errbuf, sizeof (errbuf)));
376 return (-1);
377 }
378 else
379 old_kernel = 1;
380 }
382 while (fgets (buffer, sizeof (buffer), fh) != NULL)
383 {
384 char *fields[8];
385 int numfields;
387 numfields = strsplit (buffer, fields, STATIC_ARRAY_SIZE (fields));
389 if (!old_kernel)
390 {
391 if (numfields != 2)
392 continue;
394 if (strcasecmp ("pswpin", fields[0]) == 0)
395 {
396 strtoderive (fields[1], &swap_in);
397 have_data |= 0x01;
398 }
399 else if (strcasecmp ("pswpout", fields[0]) == 0)
400 {
401 strtoderive (fields[1], &swap_out);
402 have_data |= 0x02;
403 }
404 }
405 else /* if (old_kernel) */
406 {
407 if (numfields != 3)
408 continue;
410 if (strcasecmp ("page", fields[0]) == 0)
411 {
412 strtoderive (fields[1], &swap_in);
413 strtoderive (fields[2], &swap_out);
414 }
415 }
416 } /* while (fgets) */
418 fclose (fh);
420 if (have_data != 0x03)
421 return (ENOENT);
423 if (report_bytes)
424 {
425 swap_in = swap_in * pagesize;
426 swap_out = swap_out * pagesize;
427 }
429 swap_submit_derive ("in", swap_in);
430 swap_submit_derive ("out", swap_out);
432 return (0);
433 } /* }}} int swap_read_io */
435 static int swap_read (void) /* {{{ */
436 {
437 if (report_by_device)
438 swap_read_separate ();
439 else
440 swap_read_combined ();
442 swap_read_io ();
444 return (0);
445 } /* }}} int swap_read */
446 /* #endif KERNEL_LINUX */
448 /*
449 * Under Solaris, two mechanisms can be used to read swap statistics, swapctl
450 * and kstat. The former reads physical space used on a device, the latter
451 * reports the view from the virtual memory system. It was decided that the
452 * kstat-based information should be moved to the "vmem" plugin, but nobody
453 * with enough Solaris experience was available at that time to do this. The
454 * code below is still there for your reference but it won't be activated in
455 * *this* plugin again. --octo
456 */
457 #elif 0 && HAVE_LIBKSTAT
458 /* kstat-based read function */
459 static int swap_read_kstat (void) /* {{{ */
460 {
461 gauge_t swap_alloc;
462 gauge_t swap_resv;
463 gauge_t swap_avail;
465 struct anoninfo ai;
467 if (swapctl (SC_AINFO, &ai) == -1)
468 {
469 char errbuf[1024];
470 ERROR ("swap plugin: swapctl failed: %s",
471 sstrerror (errno, errbuf, sizeof (errbuf)));
472 return (-1);
473 }
475 /*
476 * Calculations from:
477 * http://cvs.opensolaris.org/source/xref/on/usr/src/cmd/swap/swap.c
478 * Also see:
479 * http://www.itworld.com/Comp/2377/UIR980701perf/ (outdated?)
480 * /usr/include/vm/anon.h
481 *
482 * In short, swap -s shows: allocated + reserved = used, available
483 *
484 * However, Solaris does not allow to allocated/reserved more than the
485 * available swap (physical memory + disk swap), so the pedant may
486 * prefer: allocated + unallocated = reserved, available
487 *
488 * We map the above to: used + resv = n/a, free
489 *
490 * Does your brain hurt yet? - Christophe Kalt
491 *
492 * Oh, and in case you wonder,
493 * swap_alloc = pagesize * ( ai.ani_max - ai.ani_free );
494 * can suffer from a 32bit overflow.
495 */
496 swap_alloc = (gauge_t) ((ai.ani_max - ai.ani_free) * pagesize);
497 swap_resv = (gauge_t) ((ai.ani_resv + ai.ani_free - ai.ani_max) * pagesize);
498 swap_avail = (gauge_t) ((ai.ani_max - ai.ani_resv) * pagesize);
500 swap_submit_usage (NULL, swap_alloc, swap_avail, "reserved", swap_resv);
501 return (0);
502 } /* }}} int swap_read_kstat */
503 /* #endif 0 && HAVE_LIBKSTAT */
505 #elif HAVE_SWAPCTL && HAVE_SWAPCTL_TWO_ARGS
506 /* swapctl-based read function */
507 static int swap_read (void) /* {{{ */
508 {
509 swaptbl_t *s;
510 char *s_paths;
511 int swap_num;
512 int status;
513 int i;
515 gauge_t avail = 0;
516 gauge_t total = 0;
518 swap_num = swapctl (SC_GETNSWP, NULL);
519 if (swap_num < 0)
520 {
521 ERROR ("swap plugin: swapctl (SC_GETNSWP) failed with status %i.",
522 swap_num);
523 return (-1);
524 }
525 else if (swap_num == 0)
526 return (0);
528 /* Allocate and initialize the swaptbl_t structure */
529 s = malloc (swap_num * sizeof (swapent_t) + sizeof (struct swaptable));
530 if (s == NULL)
531 {
532 ERROR ("swap plugin: malloc failed.");
533 return (-1);
534 }
536 /* Memory to store the path names. We only use these paths when the
537 * separate option has been configured, but it's easier to just
538 * allocate enough memory in any case. */
539 s_paths = calloc (swap_num, PATH_MAX);
540 if (s_paths == NULL)
541 {
542 ERROR ("swap plugin: calloc failed.");
543 sfree (s);
544 return (-1);
545 }
546 for (i = 0; i < swap_num; i++)
547 s->swt_ent[i].ste_path = s_paths + (i * PATH_MAX);
548 s->swt_n = swap_num;
550 status = swapctl (SC_LIST, s);
551 if (status < 0)
552 {
553 char errbuf[1024];
554 ERROR ("swap plugin: swapctl (SC_LIST) failed: %s",
555 sstrerror (errno, errbuf, sizeof (errbuf)));
556 sfree (s_paths);
557 sfree (s);
558 return (-1);
559 }
560 else if (swap_num < status)
561 {
562 /* more elements returned than requested */
563 ERROR ("swap plugin: I allocated memory for %i structure%s, "
564 "but swapctl(2) claims to have returned %i. "
565 "I'm confused and will give up.",
566 swap_num, (swap_num == 1) ? "" : "s",
567 status);
568 sfree (s_paths);
569 sfree (s);
570 return (-1);
571 }
572 else if (swap_num > status)
573 /* less elements returned than requested */
574 swap_num = status;
576 for (i = 0; i < swap_num; i++)
577 {
578 char path[PATH_MAX];
579 gauge_t this_total;
580 gauge_t this_avail;
582 if ((s->swt_ent[i].ste_flags & ST_INDEL) != 0)
583 continue;
585 this_total = (gauge_t) (s->swt_ent[i].ste_pages * pagesize);
586 this_avail = (gauge_t) (s->swt_ent[i].ste_free * pagesize);
588 /* Shortcut for the "combined" setting (default) */
589 if (!report_by_device)
590 {
591 avail += this_avail;
592 total += this_total;
593 continue;
594 }
596 sstrncpy (path, s->swt_ent[i].ste_path, sizeof (path));
597 escape_slashes (path, sizeof (path));
599 swap_submit_usage (path, this_total - this_avail, this_avail,
600 NULL, NAN);
601 } /* for (swap_num) */
603 if (total < avail)
604 {
605 ERROR ("swap plugin: Total swap space (%g) is less than free swap space (%g).",
606 total, avail);
607 sfree (s_paths);
608 sfree (s);
609 return (-1);
610 }
612 /* If the "separate" option was specified (report_by_device == 1), all
613 * values have already been dispatched from within the loop. */
614 if (!report_by_device)
615 swap_submit_usage (NULL, total - avail, avail, NULL, NAN);
617 sfree (s_paths);
618 sfree (s);
619 return (0);
620 } /* }}} int swap_read */
621 /* #endif HAVE_SWAPCTL && HAVE_SWAPCTL_TWO_ARGS */
623 #elif HAVE_SWAPCTL && HAVE_SWAPCTL_THREE_ARGS
624 static int swap_read (void) /* {{{ */
625 {
626 struct swapent *swap_entries;
627 int swap_num;
628 int status;
629 int i;
631 gauge_t used = 0;
632 gauge_t total = 0;
634 swap_num = swapctl (SWAP_NSWAP, NULL, 0);
635 if (swap_num < 0)
636 {
637 ERROR ("swap plugin: swapctl (SWAP_NSWAP) failed with status %i.",
638 swap_num);
639 return (-1);
640 }
641 else if (swap_num == 0)
642 return (0);
644 swap_entries = calloc (swap_num, sizeof (*swap_entries));
645 if (swap_entries == NULL)
646 {
647 ERROR ("swap plugin: calloc failed.");
648 return (-1);
649 }
651 status = swapctl (SWAP_STATS, swap_entries, swap_num);
652 if (status != swap_num)
653 {
654 ERROR ("swap plugin: swapctl (SWAP_STATS) failed with status %i.",
655 status);
656 sfree (swap_entries);
657 return (-1);
658 }
660 #if defined(DEV_BSIZE) && (DEV_BSIZE > 0)
661 # define C_SWAP_BLOCK_SIZE ((gauge_t) DEV_BSIZE)
662 #else
663 # define C_SWAP_BLOCK_SIZE 512.0
664 #endif
666 /* TODO: Report per-device stats. The path name is available from
667 * swap_entries[i].se_path */
668 for (i = 0; i < swap_num; i++)
669 {
670 if ((swap_entries[i].se_flags & SWF_ENABLE) == 0)
671 continue;
673 used += ((gauge_t) swap_entries[i].se_inuse) * C_SWAP_BLOCK_SIZE;
674 total += ((gauge_t) swap_entries[i].se_nblks) * C_SWAP_BLOCK_SIZE;
675 }
677 if (total < used)
678 {
679 ERROR ("swap plugin: Total swap space (%g) is less than used swap space (%g).",
680 total, used);
681 return (-1);
682 }
684 swap_submit_usage (NULL, used, total - used, NULL, NAN);
686 sfree (swap_entries);
687 return (0);
688 } /* }}} int swap_read */
689 /* #endif HAVE_SWAPCTL && HAVE_SWAPCTL_THREE_ARGS */
691 #elif defined(VM_SWAPUSAGE)
692 static int swap_read (void) /* {{{ */
693 {
694 int mib[3];
695 size_t mib_len;
696 struct xsw_usage sw_usage;
697 size_t sw_usage_len;
699 mib_len = 2;
700 mib[0] = CTL_VM;
701 mib[1] = VM_SWAPUSAGE;
703 sw_usage_len = sizeof (struct xsw_usage);
705 if (sysctl (mib, mib_len, &sw_usage, &sw_usage_len, NULL, 0) != 0)
706 return (-1);
708 /* The returned values are bytes. */
709 swap_submit_usage (NULL,
710 (gauge_t) sw_usage.xsu_used, (gauge_t) sw_usage.xsu_avail,
711 NULL, NAN);
713 return (0);
714 } /* }}} int swap_read */
715 /* #endif VM_SWAPUSAGE */
717 #elif HAVE_LIBKVM_GETSWAPINFO
718 static int swap_read (void) /* {{{ */
719 {
720 struct kvm_swap data_s;
721 int status;
723 gauge_t used;
724 gauge_t total;
726 if (kvm_obj == NULL)
727 return (-1);
729 /* only one structure => only get the grand total, no details */
730 status = kvm_getswapinfo (kvm_obj, &data_s, 1, 0);
731 if (status == -1)
732 return (-1);
734 total = (gauge_t) data_s.ksw_total;
735 used = (gauge_t) data_s.ksw_used;
737 total *= (gauge_t) kvm_pagesize;
738 used *= (gauge_t) kvm_pagesize;
740 swap_submit_usage (NULL, used, total - used, NULL, NAN);
742 return (0);
743 } /* }}} int swap_read */
744 /* #endif HAVE_LIBKVM_GETSWAPINFO */
746 #elif HAVE_LIBSTATGRAB
747 static int swap_read (void) /* {{{ */
748 {
749 sg_swap_stats *swap;
751 swap = sg_get_swap_stats ();
752 if (swap == NULL)
753 return (-1);
755 swap_submit_usage (NULL, (gauge_t) swap->used, (gauge_t) swap->free,
756 NULL, NAN);
758 return (0);
759 } /* }}} int swap_read */
760 /* #endif HAVE_LIBSTATGRAB */
762 #elif HAVE_PERFSTAT
763 static int swap_read (void) /* {{{ */
764 {
765 perfstat_memory_total_t pmemory = { 0 };
766 int status;
768 gauge_t total;
769 gauge_t free;
770 gauge_t reserved;
772 status = perfstat_memory_total (NULL, &pmemory, sizeof(perfstat_memory_total_t), 1);
773 if (status < 0)
774 {
775 char errbuf[1024];
776 WARNING ("swap plugin: perfstat_memory_total failed: %s",
777 sstrerror (errno, errbuf, sizeof (errbuf)));
778 return (-1);
779 }
781 total = (gauge_t) (pmemory.pgsp_total * pagesize);
782 free = (gauge_t) (pmemory.pgsp_free * pagesize);
783 reserved = (gauge_t) (pmemory.pgsp_rsvd * pagesize);
785 swap_submit_usage (NULL, total - free, free, "reserved", reserved);
786 swap_submit_derive ("in", (derive_t) pmemory.pgspins * pagesize);
787 swap_submit_derive ("out", (derive_t) pmemory.pgspouts * pagesize);
789 return (0);
790 } /* }}} int swap_read */
791 #endif /* HAVE_PERFSTAT */
793 void module_register (void)
794 {
795 plugin_register_complex_config ("swap", swap_config);
796 plugin_register_init ("swap", swap_init);
797 plugin_register_read ("swap", swap_read);
798 } /* void module_register */
800 /* vim: set fdm=marker : */