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"
38 #include "common.h"
39 #include "plugin.h"
41 #if HAVE_SYS_SWAP_H
42 # include <sys/swap.h>
43 #endif
44 #if HAVE_VM_ANON_H
45 # include <vm/anon.h>
46 #endif
47 #if HAVE_SYS_PARAM_H
48 # include <sys/param.h>
49 #endif
50 #if HAVE_SYS_SYSCTL_H
51 # include <sys/sysctl.h>
52 #endif
53 #if HAVE_SYS_DKSTAT_H
54 # include <sys/dkstat.h>
55 #endif
56 #if HAVE_KVM_H
57 # include <kvm.h>
58 #endif
60 #if HAVE_STATGRAB_H
61 # include <statgrab.h>
62 #endif
64 #if HAVE_PERFSTAT
65 # include <sys/protosw.h>
66 # include <libperfstat.h>
67 #endif
69 #undef MAX
70 #define MAX(x,y) ((x) > (y) ? (x) : (y))
72 #if KERNEL_LINUX
73 # define SWAP_HAVE_REPORT_BY_DEVICE 1
74 static derive_t pagesize;
75 static _Bool report_bytes = 0;
76 static _Bool report_by_device = 0;
77 /* #endif KERNEL_LINUX */
79 #elif HAVE_SWAPCTL && HAVE_SWAPCTL_TWO_ARGS
80 # define SWAP_HAVE_REPORT_BY_DEVICE 1
81 static derive_t pagesize;
82 static _Bool report_by_device = 0;
83 /* #endif HAVE_SWAPCTL && HAVE_SWAPCTL_TWO_ARGS */
85 #elif HAVE_SWAPCTL && HAVE_SWAPCTL_THREE_ARGS
86 /* No global variables */
87 /* #endif HAVE_SWAPCTL && HAVE_SWAPCTL_THREE_ARGS */
89 #elif defined(VM_SWAPUSAGE)
90 /* No global variables */
91 /* #endif defined(VM_SWAPUSAGE) */
93 #elif HAVE_LIBKVM_GETSWAPINFO
94 static kvm_t *kvm_obj = NULL;
95 int kvm_pagesize;
96 /* #endif HAVE_LIBKVM_GETSWAPINFO */
98 #elif HAVE_LIBSTATGRAB
99 /* No global variables */
100 /* #endif HAVE_LIBSTATGRAB */
102 #elif HAVE_PERFSTAT
103 static int pagesize;
104 /*# endif HAVE_PERFSTAT */
106 #else
107 # error "No applicable input method."
108 #endif /* HAVE_LIBSTATGRAB */
110 static _Bool values_absolute = 1;
111 static _Bool values_percentage = 0;
113 static int swap_config (oconfig_item_t *ci) /* {{{ */
114 {
115 int i;
117 for (i = 0; i < ci->children_num; i++)
118 {
119 oconfig_item_t *child = ci->children + i;
120 if (strcasecmp ("ReportBytes", child->key) == 0)
121 #if KERNEL_LINUX
122 cf_util_get_boolean (child, &report_bytes);
123 #else
124 WARNING ("swap plugin: The \"ReportBytes\" option "
125 "is only valid under Linux. "
126 "The option is going to be ignored.");
127 #endif
128 else if (strcasecmp ("ReportByDevice", child->key) == 0)
129 #if SWAP_HAVE_REPORT_BY_DEVICE
130 cf_util_get_boolean (child, &report_by_device);
131 #else
132 WARNING ("swap plugin: The \"ReportByDevice\" option "
133 "is not supported on this platform. "
134 "The option is going to be ignored.");
135 #endif /* SWAP_HAVE_REPORT_BY_DEVICE */
136 else if (strcasecmp ("ValuesAbsolute", child->key) == 0)
137 cf_util_get_boolean (child, &values_absolute);
138 else if (strcasecmp ("ValuesPercentage", child->key) == 0)
139 cf_util_get_boolean (child, &values_percentage);
140 else
141 WARNING ("swap plugin: Unknown config option: \"%s\"",
142 child->key);
143 }
145 return (0);
146 } /* }}} int swap_config */
148 static int swap_init (void) /* {{{ */
149 {
150 #if KERNEL_LINUX
151 pagesize = (derive_t) sysconf (_SC_PAGESIZE);
152 /* #endif KERNEL_LINUX */
154 #elif HAVE_SWAPCTL && HAVE_SWAPCTL_TWO_ARGS
155 /* getpagesize(3C) tells me this does not fail.. */
156 pagesize = (derive_t) getpagesize ();
157 /* #endif HAVE_SWAPCTL */
159 #elif defined(VM_SWAPUSAGE)
160 /* No init stuff */
161 /* #endif defined(VM_SWAPUSAGE) */
163 #elif HAVE_LIBKVM_GETSWAPINFO
164 char errbuf[_POSIX2_LINE_MAX];
166 if (kvm_obj != NULL)
167 {
168 kvm_close (kvm_obj);
169 kvm_obj = NULL;
170 }
172 kvm_pagesize = getpagesize ();
174 kvm_obj = kvm_openfiles (NULL, "/dev/null", NULL, O_RDONLY, errbuf);
176 if (kvm_obj == NULL)
177 {
178 ERROR ("swap plugin: kvm_openfiles failed, %s", errbuf);
179 return (-1);
180 }
181 /* #endif HAVE_LIBKVM_GETSWAPINFO */
183 #elif HAVE_LIBSTATGRAB
184 /* No init stuff */
185 /* #endif HAVE_LIBSTATGRAB */
187 #elif HAVE_PERFSTAT
188 pagesize = getpagesize();
189 #endif /* HAVE_PERFSTAT */
191 return (0);
192 } /* }}} int swap_init */
194 static void swap_submit_usage (char const *plugin_instance, /* {{{ */
195 gauge_t used, gauge_t free,
196 char const *other_name, gauge_t other_value)
197 {
198 value_t v[1];
199 value_list_t vl = VALUE_LIST_INIT;
201 vl.values = v;
202 vl.values_len = STATIC_ARRAY_SIZE (v);
203 sstrncpy (vl.host, hostname_g, sizeof (vl.host));
204 sstrncpy (vl.plugin, "swap", sizeof (vl.plugin));
205 if (plugin_instance != NULL)
206 sstrncpy (vl.plugin_instance, plugin_instance,
207 sizeof (vl.plugin_instance));
208 sstrncpy (vl.type, "swap", sizeof (vl.type));
210 if (values_absolute)
211 plugin_dispatch_multivalue (&vl, 0, DS_TYPE_GAUGE,
212 "used", used, "free", free,
213 other_name, other_value, NULL);
214 if (values_percentage)
215 plugin_dispatch_multivalue (&vl, 1, DS_TYPE_GAUGE,
216 "used", used, "free", free,
217 other_name, other_value, NULL);
218 } /* }}} void swap_submit_usage */
220 #if KERNEL_LINUX || HAVE_PERFSTAT
221 __attribute__((nonnull(1)))
222 static void swap_submit_derive (char const *type_instance, /* {{{ */
223 derive_t value)
224 {
225 value_list_t vl = VALUE_LIST_INIT;
226 value_t v[1];
228 v[0].derive = value;
230 vl.values = v;
231 vl.values_len = STATIC_ARRAY_SIZE (v);
232 sstrncpy (vl.host, hostname_g, sizeof (vl.host));
233 sstrncpy (vl.plugin, "swap", sizeof (vl.plugin));
234 sstrncpy (vl.type, "swap_io", sizeof (vl.type));
235 sstrncpy (vl.type_instance, type_instance, sizeof (vl.type_instance));
237 plugin_dispatch_values (&vl);
238 } /* }}} void swap_submit_derive */
239 #endif
241 #if KERNEL_LINUX
242 static int swap_read_separate (void) /* {{{ */
243 {
244 FILE *fh;
245 char buffer[1024];
247 fh = fopen ("/proc/swaps", "r");
248 if (fh == NULL)
249 {
250 char errbuf[1024];
251 WARNING ("swap plugin: fopen (/proc/swaps) failed: %s",
252 sstrerror (errno, errbuf, sizeof (errbuf)));
253 return (-1);
254 }
256 while (fgets (buffer, sizeof (buffer), fh) != NULL)
257 {
258 char *fields[8];
259 int numfields;
260 char *endptr;
262 char path[PATH_MAX];
263 gauge_t total;
264 gauge_t used;
266 numfields = strsplit (buffer, fields, STATIC_ARRAY_SIZE (fields));
267 if (numfields != 5)
268 continue;
270 sstrncpy (path, fields[0], sizeof (path));
271 escape_slashes (path, sizeof (path));
273 errno = 0;
274 endptr = NULL;
275 total = strtod (fields[2], &endptr);
276 if ((endptr == fields[2]) || (errno != 0))
277 continue;
279 errno = 0;
280 endptr = NULL;
281 used = strtod (fields[3], &endptr);
282 if ((endptr == fields[3]) || (errno != 0))
283 continue;
285 if (total < used)
286 continue;
288 swap_submit_usage (path, used * 1024.0, (total - used) * 1024.0,
289 NULL, NAN);
290 }
292 fclose (fh);
294 return (0);
295 } /* }}} int swap_read_separate */
297 static int swap_read_combined (void) /* {{{ */
298 {
299 FILE *fh;
300 char buffer[1024];
302 gauge_t swap_used = NAN;
303 gauge_t swap_cached = NAN;
304 gauge_t swap_free = NAN;
305 gauge_t swap_total = NAN;
307 fh = fopen ("/proc/meminfo", "r");
308 if (fh == NULL)
309 {
310 char errbuf[1024];
311 WARNING ("swap plugin: fopen (/proc/meminfo) failed: %s",
312 sstrerror (errno, errbuf, sizeof (errbuf)));
313 return (-1);
314 }
316 while (fgets (buffer, sizeof (buffer), fh) != NULL)
317 {
318 char *fields[8];
319 int numfields;
321 numfields = strsplit (buffer, fields, STATIC_ARRAY_SIZE (fields));
322 if (numfields < 2)
323 continue;
325 if (strcasecmp (fields[0], "SwapTotal:") == 0)
326 strtogauge (fields[1], &swap_total);
327 else if (strcasecmp (fields[0], "SwapFree:") == 0)
328 strtogauge (fields[1], &swap_free);
329 else if (strcasecmp (fields[0], "SwapCached:") == 0)
330 strtogauge (fields[1], &swap_cached);
331 }
333 fclose (fh);
335 if (isnan (swap_total) || isnan (swap_free))
336 return (ENOENT);
338 /* Some systems, OpenVZ for example, don't provide SwapCached. */
339 if (isnan (swap_cached))
340 swap_used = swap_total - swap_free;
341 else
342 swap_used = swap_total - (swap_free + swap_cached);
343 assert (!isnan (swap_used));
345 if (swap_used < 0.0)
346 return (EINVAL);
348 swap_submit_usage (NULL, swap_used * 1024.0, swap_free * 1024.0,
349 isnan (swap_cached) ? NULL : "cached",
350 isnan (swap_cached) ? NAN : swap_cached * 1024.0);
351 return (0);
352 } /* }}} int swap_read_combined */
354 static int swap_read_io (void) /* {{{ */
355 {
356 FILE *fh;
357 char buffer[1024];
359 _Bool old_kernel = 0;
361 uint8_t have_data = 0;
362 derive_t swap_in = 0;
363 derive_t swap_out = 0;
365 fh = fopen ("/proc/vmstat", "r");
366 if (fh == NULL)
367 {
368 /* /proc/vmstat does not exist in kernels <2.6 */
369 fh = fopen ("/proc/stat", "r");
370 if (fh == NULL)
371 {
372 char errbuf[1024];
373 WARNING ("swap: fopen: %s",
374 sstrerror (errno, errbuf, sizeof (errbuf)));
375 return (-1);
376 }
377 else
378 old_kernel = 1;
379 }
381 while (fgets (buffer, sizeof (buffer), fh) != NULL)
382 {
383 char *fields[8];
384 int numfields;
386 numfields = strsplit (buffer, fields, STATIC_ARRAY_SIZE (fields));
388 if (!old_kernel)
389 {
390 if (numfields != 2)
391 continue;
393 if (strcasecmp ("pswpin", fields[0]) == 0)
394 {
395 strtoderive (fields[1], &swap_in);
396 have_data |= 0x01;
397 }
398 else if (strcasecmp ("pswpout", fields[0]) == 0)
399 {
400 strtoderive (fields[1], &swap_out);
401 have_data |= 0x02;
402 }
403 }
404 else /* if (old_kernel) */
405 {
406 if (numfields != 3)
407 continue;
409 if (strcasecmp ("page", fields[0]) == 0)
410 {
411 strtoderive (fields[1], &swap_in);
412 strtoderive (fields[2], &swap_out);
413 }
414 }
415 } /* while (fgets) */
417 fclose (fh);
419 if (have_data != 0x03)
420 return (ENOENT);
422 if (report_bytes)
423 {
424 swap_in = swap_in * pagesize;
425 swap_out = swap_out * pagesize;
426 }
428 swap_submit_derive ("in", swap_in);
429 swap_submit_derive ("out", swap_out);
431 return (0);
432 } /* }}} int swap_read_io */
434 static int swap_read (void) /* {{{ */
435 {
436 if (report_by_device)
437 swap_read_separate ();
438 else
439 swap_read_combined ();
441 swap_read_io ();
443 return (0);
444 } /* }}} int swap_read */
445 /* #endif KERNEL_LINUX */
447 /*
448 * Under Solaris, two mechanisms can be used to read swap statistics, swapctl
449 * and kstat. The former reads physical space used on a device, the latter
450 * reports the view from the virtual memory system. It was decided that the
451 * kstat-based information should be moved to the "vmem" plugin, but nobody
452 * with enough Solaris experience was available at that time to do this. The
453 * code below is still there for your reference but it won't be activated in
454 * *this* plugin again. --octo
455 */
456 #elif 0 && HAVE_LIBKSTAT
457 /* kstat-based read function */
458 static int swap_read_kstat (void) /* {{{ */
459 {
460 gauge_t swap_alloc;
461 gauge_t swap_resv;
462 gauge_t swap_avail;
464 struct anoninfo ai;
466 if (swapctl (SC_AINFO, &ai) == -1)
467 {
468 char errbuf[1024];
469 ERROR ("swap plugin: swapctl failed: %s",
470 sstrerror (errno, errbuf, sizeof (errbuf)));
471 return (-1);
472 }
474 /*
475 * Calculations from:
476 * http://cvs.opensolaris.org/source/xref/on/usr/src/cmd/swap/swap.c
477 * Also see:
478 * http://www.itworld.com/Comp/2377/UIR980701perf/ (outdated?)
479 * /usr/include/vm/anon.h
480 *
481 * In short, swap -s shows: allocated + reserved = used, available
482 *
483 * However, Solaris does not allow to allocated/reserved more than the
484 * available swap (physical memory + disk swap), so the pedant may
485 * prefer: allocated + unallocated = reserved, available
486 *
487 * We map the above to: used + resv = n/a, free
488 *
489 * Does your brain hurt yet? - Christophe Kalt
490 *
491 * Oh, and in case you wonder,
492 * swap_alloc = pagesize * ( ai.ani_max - ai.ani_free );
493 * can suffer from a 32bit overflow.
494 */
495 swap_alloc = (gauge_t) ((ai.ani_max - ai.ani_free) * pagesize);
496 swap_resv = (gauge_t) ((ai.ani_resv + ai.ani_free - ai.ani_max) * pagesize);
497 swap_avail = (gauge_t) ((ai.ani_max - ai.ani_resv) * pagesize);
499 swap_submit_usage (NULL, swap_alloc, swap_avail, "reserved", swap_resv);
500 return (0);
501 } /* }}} int swap_read_kstat */
502 /* #endif 0 && HAVE_LIBKSTAT */
504 #elif HAVE_SWAPCTL && HAVE_SWAPCTL_TWO_ARGS
505 /* swapctl-based read function */
506 static int swap_read (void) /* {{{ */
507 {
508 swaptbl_t *s;
509 char *s_paths;
510 int swap_num;
511 int status;
512 int i;
514 gauge_t avail = 0;
515 gauge_t total = 0;
517 swap_num = swapctl (SC_GETNSWP, NULL);
518 if (swap_num < 0)
519 {
520 ERROR ("swap plugin: swapctl (SC_GETNSWP) failed with status %i.",
521 swap_num);
522 return (-1);
523 }
524 else if (swap_num == 0)
525 return (0);
527 /* Allocate and initialize the swaptbl_t structure */
528 s = malloc (swap_num * sizeof (swapent_t) + sizeof (struct swaptable));
529 if (s == NULL)
530 {
531 ERROR ("swap plugin: malloc failed.");
532 return (-1);
533 }
535 /* Memory to store the path names. We only use these paths when the
536 * separate option has been configured, but it's easier to just
537 * allocate enough memory in any case. */
538 s_paths = calloc (swap_num, PATH_MAX);
539 if (s_paths == NULL)
540 {
541 ERROR ("swap plugin: calloc failed.");
542 sfree (s);
543 return (-1);
544 }
545 for (i = 0; i < swap_num; i++)
546 s->swt_ent[i].ste_path = s_paths + (i * PATH_MAX);
547 s->swt_n = swap_num;
549 status = swapctl (SC_LIST, s);
550 if (status < 0)
551 {
552 char errbuf[1024];
553 ERROR ("swap plugin: swapctl (SC_LIST) failed: %s",
554 sstrerror (errno, errbuf, sizeof (errbuf)));
555 sfree (s_paths);
556 sfree (s);
557 return (-1);
558 }
559 else if (swap_num < status)
560 {
561 /* more elements returned than requested */
562 ERROR ("swap plugin: I allocated memory for %i structure%s, "
563 "but swapctl(2) claims to have returned %i. "
564 "I'm confused and will give up.",
565 swap_num, (swap_num == 1) ? "" : "s",
566 status);
567 sfree (s_paths);
568 sfree (s);
569 return (-1);
570 }
571 else if (swap_num > status)
572 /* less elements returned than requested */
573 swap_num = status;
575 for (i = 0; i < swap_num; i++)
576 {
577 char path[PATH_MAX];
578 gauge_t this_total;
579 gauge_t this_avail;
581 if ((s->swt_ent[i].ste_flags & ST_INDEL) != 0)
582 continue;
584 this_total = (gauge_t) (s->swt_ent[i].ste_pages * pagesize);
585 this_avail = (gauge_t) (s->swt_ent[i].ste_free * pagesize);
587 /* Shortcut for the "combined" setting (default) */
588 if (!report_by_device)
589 {
590 avail += this_avail;
591 total += this_total;
592 continue;
593 }
595 sstrncpy (path, s->swt_ent[i].ste_path, sizeof (path));
596 escape_slashes (path, sizeof (path));
598 swap_submit_usage (path, this_total - this_avail, this_avail,
599 NULL, NAN);
600 } /* for (swap_num) */
602 if (total < avail)
603 {
604 ERROR ("swap plugin: Total swap space (%g) is less than free swap space (%g).",
605 total, avail);
606 sfree (s_paths);
607 sfree (s);
608 return (-1);
609 }
611 /* If the "separate" option was specified (report_by_device == 1), all
612 * values have already been dispatched from within the loop. */
613 if (!report_by_device)
614 swap_submit_usage (NULL, total - avail, avail, NULL, NAN);
616 sfree (s_paths);
617 sfree (s);
618 return (0);
619 } /* }}} int swap_read */
620 /* #endif HAVE_SWAPCTL && HAVE_SWAPCTL_TWO_ARGS */
622 #elif HAVE_SWAPCTL && HAVE_SWAPCTL_THREE_ARGS
623 static int swap_read (void) /* {{{ */
624 {
625 struct swapent *swap_entries;
626 int swap_num;
627 int status;
628 int i;
630 gauge_t used = 0;
631 gauge_t total = 0;
633 swap_num = swapctl (SWAP_NSWAP, NULL, 0);
634 if (swap_num < 0)
635 {
636 ERROR ("swap plugin: swapctl (SWAP_NSWAP) failed with status %i.",
637 swap_num);
638 return (-1);
639 }
640 else if (swap_num == 0)
641 return (0);
643 swap_entries = calloc (swap_num, sizeof (*swap_entries));
644 if (swap_entries == NULL)
645 {
646 ERROR ("swap plugin: calloc failed.");
647 return (-1);
648 }
650 status = swapctl (SWAP_STATS, swap_entries, swap_num);
651 if (status != swap_num)
652 {
653 ERROR ("swap plugin: swapctl (SWAP_STATS) failed with status %i.",
654 status);
655 sfree (swap_entries);
656 return (-1);
657 }
659 #if defined(DEV_BSIZE) && (DEV_BSIZE > 0)
660 # define C_SWAP_BLOCK_SIZE ((gauge_t) DEV_BSIZE)
661 #else
662 # define C_SWAP_BLOCK_SIZE 512.0
663 #endif
665 /* TODO: Report per-device stats. The path name is available from
666 * swap_entries[i].se_path */
667 for (i = 0; i < swap_num; i++)
668 {
669 if ((swap_entries[i].se_flags & SWF_ENABLE) == 0)
670 continue;
672 used += ((gauge_t) swap_entries[i].se_inuse) * C_SWAP_BLOCK_SIZE;
673 total += ((gauge_t) swap_entries[i].se_nblks) * C_SWAP_BLOCK_SIZE;
674 }
676 if (total < used)
677 {
678 ERROR ("swap plugin: Total swap space (%g) is less than used swap space (%g).",
679 total, used);
680 return (-1);
681 }
683 swap_submit_usage (NULL, used, total - used, NULL, NAN);
685 sfree (swap_entries);
686 return (0);
687 } /* }}} int swap_read */
688 /* #endif HAVE_SWAPCTL && HAVE_SWAPCTL_THREE_ARGS */
690 #elif defined(VM_SWAPUSAGE)
691 static int swap_read (void) /* {{{ */
692 {
693 int mib[3];
694 size_t mib_len;
695 struct xsw_usage sw_usage;
696 size_t sw_usage_len;
698 mib_len = 2;
699 mib[0] = CTL_VM;
700 mib[1] = VM_SWAPUSAGE;
702 sw_usage_len = sizeof (struct xsw_usage);
704 if (sysctl (mib, mib_len, &sw_usage, &sw_usage_len, NULL, 0) != 0)
705 return (-1);
707 /* The returned values are bytes. */
708 swap_submit_usage (NULL,
709 (gauge_t) sw_usage.xsu_used, (gauge_t) sw_usage.xsu_avail,
710 NULL, NAN);
712 return (0);
713 } /* }}} int swap_read */
714 /* #endif VM_SWAPUSAGE */
716 #elif HAVE_LIBKVM_GETSWAPINFO
717 static int swap_read (void) /* {{{ */
718 {
719 struct kvm_swap data_s;
720 int status;
722 gauge_t used;
723 gauge_t total;
725 if (kvm_obj == NULL)
726 return (-1);
728 /* only one structure => only get the grand total, no details */
729 status = kvm_getswapinfo (kvm_obj, &data_s, 1, 0);
730 if (status == -1)
731 return (-1);
733 total = (gauge_t) data_s.ksw_total;
734 used = (gauge_t) data_s.ksw_used;
736 total *= (gauge_t) kvm_pagesize;
737 used *= (gauge_t) kvm_pagesize;
739 swap_submit_usage (NULL, used, total - used, NULL, NAN);
741 return (0);
742 } /* }}} int swap_read */
743 /* #endif HAVE_LIBKVM_GETSWAPINFO */
745 #elif HAVE_LIBSTATGRAB
746 static int swap_read (void) /* {{{ */
747 {
748 sg_swap_stats *swap;
750 swap = sg_get_swap_stats ();
751 if (swap == NULL)
752 return (-1);
754 swap_submit_usage (NULL, (gauge_t) swap->used, (gauge_t) swap->free,
755 NULL, NAN);
757 return (0);
758 } /* }}} int swap_read */
759 /* #endif HAVE_LIBSTATGRAB */
761 #elif HAVE_PERFSTAT
762 static int swap_read (void) /* {{{ */
763 {
764 perfstat_memory_total_t pmemory;
765 int status;
767 gauge_t total;
768 gauge_t free;
769 gauge_t reserved;
771 memset (&pmemory, 0, sizeof (pmemory));
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 : */