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 defined(VM_SWAPUSAGE)
86 /* No global variables */
87 /* #endif defined(VM_SWAPUSAGE) */
89 #elif HAVE_LIBKVM_GETSWAPINFO
90 static kvm_t *kvm_obj = NULL;
91 int kvm_pagesize;
92 /* #endif HAVE_LIBKVM_GETSWAPINFO */
94 #elif HAVE_LIBSTATGRAB
95 /* No global variables */
96 /* #endif HAVE_LIBSTATGRAB */
98 #elif HAVE_PERFSTAT
99 static int pagesize;
100 /*# endif HAVE_PERFSTAT */
102 #else
103 # error "No applicable input method."
104 #endif /* HAVE_LIBSTATGRAB */
106 static _Bool values_absolute = 1;
107 static _Bool values_percentage = 0;
109 static int swap_config (oconfig_item_t *ci) /* {{{ */
110 {
111 int i;
113 for (i = 0; i < ci->children_num; i++)
114 {
115 oconfig_item_t *child = ci->children + i;
116 if (strcasecmp ("ReportBytes", child->key) == 0)
117 #if KERNEL_LINUX
118 cf_util_get_boolean (child, &report_bytes);
119 #else
120 WARNING ("swap plugin: The \"ReportBytes\" option "
121 "is only valid under Linux. "
122 "The option is going to be ignored.");
123 #endif
124 else if (strcasecmp ("ReportByDevice", child->key) == 0)
125 #if SWAP_HAVE_REPORT_BY_DEVICE
126 cf_util_get_boolean (child, &report_by_device);
127 #else
128 WARNING ("swap plugin: The \"ReportByDevice\" option "
129 "is not supported on this platform. "
130 "The option is going to be ignored.");
131 #endif /* SWAP_HAVE_REPORT_BY_DEVICE */
132 else if (strcasecmp ("ValuesAbsolute", child->key) == 0)
133 cf_util_get_boolean (child, &values_absolute);
134 else if (strcasecmp ("ValuesPercentage", child->key) == 0)
135 cf_util_get_boolean (child, &values_percentage);
136 else
137 WARNING ("swap plugin: Unknown config option: \"%s\"",
138 child->key);
139 }
141 return (0);
142 } /* }}} int swap_config */
144 static int swap_init (void) /* {{{ */
145 {
146 #if KERNEL_LINUX
147 pagesize = (derive_t) sysconf (_SC_PAGESIZE);
148 /* #endif KERNEL_LINUX */
150 #elif HAVE_SWAPCTL && HAVE_SWAPCTL_TWO_ARGS
151 /* getpagesize(3C) tells me this does not fail.. */
152 pagesize = (derive_t) getpagesize ();
153 /* #endif HAVE_SWAPCTL */
155 #elif defined(VM_SWAPUSAGE)
156 /* No init stuff */
157 /* #endif defined(VM_SWAPUSAGE) */
159 #elif HAVE_LIBKVM_GETSWAPINFO
160 if (kvm_obj != NULL)
161 {
162 kvm_close (kvm_obj);
163 kvm_obj = NULL;
164 }
166 kvm_pagesize = getpagesize ();
168 if ((kvm_obj = kvm_open (NULL, /* execfile */
169 NULL, /* corefile */
170 NULL, /* swapfile */
171 O_RDONLY, /* flags */
172 NULL)) /* errstr */
173 == NULL)
174 {
175 ERROR ("swap plugin: kvm_open failed.");
176 return (-1);
177 }
178 /* #endif HAVE_LIBKVM_GETSWAPINFO */
180 #elif HAVE_LIBSTATGRAB
181 /* No init stuff */
182 /* #endif HAVE_LIBSTATGRAB */
184 #elif HAVE_PERFSTAT
185 pagesize = getpagesize();
186 #endif /* HAVE_PERFSTAT */
188 return (0);
189 } /* }}} int swap_init */
191 static void swap_submit_usage (char const *plugin_instance, /* {{{ */
192 gauge_t used, gauge_t free,
193 char const *other_name, gauge_t other_value)
194 {
195 value_t v[1];
196 value_list_t vl = VALUE_LIST_INIT;
198 vl.values = v;
199 vl.values_len = STATIC_ARRAY_SIZE (v);
200 sstrncpy (vl.host, hostname_g, sizeof (vl.host));
201 sstrncpy (vl.plugin, "swap", sizeof (vl.plugin));
202 if (plugin_instance != NULL)
203 sstrncpy (vl.plugin_instance, plugin_instance,
204 sizeof (vl.plugin_instance));
205 sstrncpy (vl.type, "swap", sizeof (vl.type));
207 if (values_absolute)
208 plugin_dispatch_multivalue (&vl, 0, DS_TYPE_GAUGE,
209 "used", used, "free", free,
210 other_name, other_value, NULL);
211 if (values_percentage)
212 plugin_dispatch_multivalue (&vl, 1, DS_TYPE_GAUGE,
213 "used", used, "free", free,
214 other_name, other_value, NULL);
215 } /* }}} void swap_submit_usage */
217 #if KERNEL_LINUX || HAVE_PERFSTAT
218 __attribute__((nonnull(1)))
219 static void swap_submit_derive (char const *type_instance, /* {{{ */
220 derive_t value)
221 {
222 value_list_t vl = VALUE_LIST_INIT;
223 value_t v[1];
225 v[0].derive = value;
227 vl.values = v;
228 vl.values_len = STATIC_ARRAY_SIZE (v);
229 sstrncpy (vl.host, hostname_g, sizeof (vl.host));
230 sstrncpy (vl.plugin, "swap", sizeof (vl.plugin));
231 sstrncpy (vl.type, "swap_io", sizeof (vl.type));
232 sstrncpy (vl.type_instance, type_instance, sizeof (vl.type_instance));
234 plugin_dispatch_values (&vl);
235 } /* }}} void swap_submit_derive */
236 #endif
238 #if KERNEL_LINUX
239 static int swap_read_separate (void) /* {{{ */
240 {
241 FILE *fh;
242 char buffer[1024];
244 fh = fopen ("/proc/swaps", "r");
245 if (fh == NULL)
246 {
247 char errbuf[1024];
248 WARNING ("swap plugin: fopen (/proc/swaps) failed: %s",
249 sstrerror (errno, errbuf, sizeof (errbuf)));
250 return (-1);
251 }
253 while (fgets (buffer, sizeof (buffer), fh) != NULL)
254 {
255 char *fields[8];
256 int numfields;
257 char *endptr;
259 char path[PATH_MAX];
260 gauge_t total;
261 gauge_t used;
263 numfields = strsplit (buffer, fields, STATIC_ARRAY_SIZE (fields));
264 if (numfields != 5)
265 continue;
267 sstrncpy (path, fields[0], sizeof (path));
268 escape_slashes (path, sizeof (path));
270 errno = 0;
271 endptr = NULL;
272 total = strtod (fields[2], &endptr);
273 if ((endptr == fields[2]) || (errno != 0))
274 continue;
276 errno = 0;
277 endptr = NULL;
278 used = strtod (fields[3], &endptr);
279 if ((endptr == fields[3]) || (errno != 0))
280 continue;
282 if (total < used)
283 continue;
285 swap_submit_usage (path, used, total - used, NULL, NAN);
286 }
288 fclose (fh);
290 return (0);
291 } /* }}} int swap_read_separate */
293 static int swap_read_combined (void) /* {{{ */
294 {
295 FILE *fh;
296 char buffer[1024];
298 gauge_t swap_used = NAN;
299 gauge_t swap_cached = NAN;
300 gauge_t swap_free = NAN;
301 gauge_t swap_total = NAN;
303 fh = fopen ("/proc/meminfo", "r");
304 if (fh == NULL)
305 {
306 char errbuf[1024];
307 WARNING ("swap plugin: fopen (/proc/meminfo) failed: %s",
308 sstrerror (errno, errbuf, sizeof (errbuf)));
309 return (-1);
310 }
312 while (fgets (buffer, sizeof (buffer), fh) != NULL)
313 {
314 char *fields[8];
315 int numfields;
317 numfields = strsplit (buffer, fields, STATIC_ARRAY_SIZE (fields));
318 if (numfields < 2)
319 continue;
321 if (strcasecmp (fields[0], "SwapTotal:") == 0)
322 strtogauge (fields[1], &swap_total);
323 else if (strcasecmp (fields[0], "SwapFree:") == 0)
324 strtogauge (fields[1], &swap_free);
325 else if (strcasecmp (fields[0], "SwapCached:") == 0)
326 strtogauge (fields[1], &swap_cached);
327 }
329 fclose (fh);
331 if (isnan (swap_total) || isnan (swap_free))
332 return (ENOENT);
334 /* Some systems, OpenVZ for example, don't provide SwapCached. */
335 if (isnan (swap_cached))
336 swap_used = swap_total - swap_free;
337 else
338 swap_used = swap_total - (swap_free + swap_cached);
339 assert (!isnan (swap_used));
341 if (swap_used < 0.0)
342 return (EINVAL);
344 swap_submit_usage (NULL, swap_used, swap_free,
345 isnan (swap_cached) ? NULL : "cached", swap_cached);
346 return (0);
347 } /* }}} int swap_read_combined */
349 static int swap_read_io (void) /* {{{ */
350 {
351 FILE *fh;
352 char buffer[1024];
354 _Bool old_kernel = 0;
356 uint8_t have_data = 0;
357 derive_t swap_in = 0;
358 derive_t swap_out = 0;
360 fh = fopen ("/proc/vmstat", "r");
361 if (fh == NULL)
362 {
363 /* /proc/vmstat does not exist in kernels <2.6 */
364 fh = fopen ("/proc/stat", "r");
365 if (fh == NULL)
366 {
367 char errbuf[1024];
368 WARNING ("swap: fopen: %s",
369 sstrerror (errno, errbuf, sizeof (errbuf)));
370 return (-1);
371 }
372 else
373 old_kernel = 1;
374 }
376 while (fgets (buffer, sizeof (buffer), fh) != NULL)
377 {
378 char *fields[8];
379 int numfields;
381 numfields = strsplit (buffer, fields, STATIC_ARRAY_SIZE (fields));
383 if (!old_kernel)
384 {
385 if (numfields != 2)
386 continue;
388 if (strcasecmp ("pswpin", fields[0]) == 0)
389 {
390 strtoderive (fields[1], &swap_in);
391 have_data |= 0x01;
392 }
393 else if (strcasecmp ("pswpout", fields[0]) == 0)
394 {
395 strtoderive (fields[1], &swap_out);
396 have_data |= 0x02;
397 }
398 }
399 else /* if (old_kernel) */
400 {
401 if (numfields != 3)
402 continue;
404 if (strcasecmp ("page", fields[0]) == 0)
405 {
406 strtoderive (fields[1], &swap_in);
407 strtoderive (fields[2], &swap_out);
408 }
409 }
410 } /* while (fgets) */
412 fclose (fh);
414 if (have_data != 0x03)
415 return (ENOENT);
417 if (report_bytes)
418 {
419 swap_in = swap_in * pagesize;
420 swap_out = swap_out * pagesize;
421 }
423 swap_submit_derive ("in", swap_in);
424 swap_submit_derive ("out", swap_out);
426 return (0);
427 } /* }}} int swap_read_io */
429 static int swap_read (void) /* {{{ */
430 {
431 if (report_by_device)
432 swap_read_separate ();
433 else
434 swap_read_combined ();
436 swap_read_io ();
438 return (0);
439 } /* }}} int swap_read */
440 /* #endif KERNEL_LINUX */
442 /*
443 * Under Solaris, two mechanisms can be used to read swap statistics, swapctl
444 * and kstat. The former reads physical space used on a device, the latter
445 * reports the view from the virtual memory system. It was decided that the
446 * kstat-based information should be moved to the "vmem" plugin, but nobody
447 * with enough Solaris experience was available at that time to do this. The
448 * code below is still there for your reference but it won't be activated in
449 * *this* plugin again. --octo
450 */
451 #elif 0 && HAVE_LIBKSTAT
452 /* kstat-based read function */
453 static int swap_read_kstat (void) /* {{{ */
454 {
455 gauge_t swap_alloc;
456 gauge_t swap_resv;
457 gauge_t swap_avail;
459 struct anoninfo ai;
461 if (swapctl (SC_AINFO, &ai) == -1)
462 {
463 char errbuf[1024];
464 ERROR ("swap plugin: swapctl failed: %s",
465 sstrerror (errno, errbuf, sizeof (errbuf)));
466 return (-1);
467 }
469 /*
470 * Calculations from:
471 * http://cvs.opensolaris.org/source/xref/on/usr/src/cmd/swap/swap.c
472 * Also see:
473 * http://www.itworld.com/Comp/2377/UIR980701perf/ (outdated?)
474 * /usr/include/vm/anon.h
475 *
476 * In short, swap -s shows: allocated + reserved = used, available
477 *
478 * However, Solaris does not allow to allocated/reserved more than the
479 * available swap (physical memory + disk swap), so the pedant may
480 * prefer: allocated + unallocated = reserved, available
481 *
482 * We map the above to: used + resv = n/a, free
483 *
484 * Does your brain hurt yet? - Christophe Kalt
485 *
486 * Oh, and in case you wonder,
487 * swap_alloc = pagesize * ( ai.ani_max - ai.ani_free );
488 * can suffer from a 32bit overflow.
489 */
490 swap_alloc = (gauge_t) ((ai.ani_max - ai.ani_free) * pagesize);
491 swap_resv = (gauge_t) ((ai.ani_resv + ai.ani_free - ai.ani_max) * pagesize);
492 swap_avail = (gauge_t) ((ai.ani_max - ai.ani_resv) * pagesize);
494 swap_submit_usage (NULL, swap_alloc, swap_avail, "reserved", swap_resv);
495 return (0);
496 } /* }}} int swap_read_kstat */
497 /* #endif 0 && HAVE_LIBKSTAT */
499 #elif HAVE_SWAPCTL && HAVE_SWAPCTL_TWO_ARGS
500 /* swapctl-based read function */
501 static int swap_read (void) /* {{{ */
502 {
503 swaptbl_t *s;
504 char *s_paths;
505 int swap_num;
506 int status;
507 int i;
509 gauge_t avail = 0;
510 gauge_t total = 0;
512 swap_num = swapctl (SC_GETNSWP, NULL);
513 if (swap_num < 0)
514 {
515 ERROR ("swap plugin: swapctl (SC_GETNSWP) failed with status %i.",
516 swap_num);
517 return (-1);
518 }
519 else if (swap_num == 0)
520 return (0);
522 /* Allocate and initialize the swaptbl_t structure */
523 s = (swaptbl_t *) smalloc (swap_num * sizeof (swapent_t) + sizeof (struct swaptable));
524 if (s == NULL)
525 {
526 ERROR ("swap plugin: smalloc failed.");
527 return (-1);
528 }
530 /* Memory to store the path names. We only use these paths when the
531 * separate option has been configured, but it's easier to just
532 * allocate enough memory in any case. */
533 s_paths = calloc (swap_num, PATH_MAX);
534 if (s_paths == NULL)
535 {
536 ERROR ("swap plugin: malloc failed.");
537 sfree (s);
538 return (-1);
539 }
540 for (i = 0; i < swap_num; i++)
541 s->swt_ent[i].ste_path = s_paths + (i * PATH_MAX);
542 s->swt_n = swap_num;
544 status = swapctl (SC_LIST, s);
545 if (status < 0)
546 {
547 char errbuf[1024];
548 ERROR ("swap plugin: swapctl (SC_LIST) failed: %s",
549 sstrerror (errno, errbuf, sizeof (errbuf)));
550 sfree (s_paths);
551 sfree (s);
552 return (-1);
553 }
554 else if (swap_num < status)
555 {
556 /* more elements returned than requested */
557 ERROR ("swap plugin: I allocated memory for %i structure%s, "
558 "but swapctl(2) claims to have returned %i. "
559 "I'm confused and will give up.",
560 swap_num, (swap_num == 1) ? "" : "s",
561 status);
562 sfree (s_paths);
563 sfree (s);
564 return (-1);
565 }
566 else if (swap_num > status)
567 /* less elements returned than requested */
568 swap_num = status;
570 for (i = 0; i < swap_num; i++)
571 {
572 char path[PATH_MAX];
573 gauge_t this_total;
574 gauge_t this_avail;
576 if ((s->swt_ent[i].ste_flags & ST_INDEL) != 0)
577 continue;
579 this_total = (gauge_t) (s->swt_ent[i].ste_pages * pagesize);
580 this_avail = (gauge_t) (s->swt_ent[i].ste_free * pagesize);
582 /* Shortcut for the "combined" setting (default) */
583 if (!report_by_device)
584 {
585 avail += this_avail;
586 total += this_total;
587 continue;
588 }
590 sstrncpy (path, s->swt_ent[i].ste_path, sizeof (path));
591 escape_slashes (path, sizeof (path));
593 swap_submit_usage (path, this_total - this_avail, this_avail,
594 NULL, NAN);
595 } /* for (swap_num) */
597 if (total < avail)
598 {
599 ERROR ("swap plugin: Total swap space (%g) is less than free swap space (%g).",
600 total, avail);
601 sfree (s_paths);
602 sfree (s);
603 return (-1);
604 }
606 /* If the "separate" option was specified (report_by_device == 1), all
607 * values have already been dispatched from within the loop. */
608 if (!report_by_device)
609 swap_submit_usage (NULL, total - avail, avail, NULL, NAN);
611 sfree (s_paths);
612 sfree (s);
613 return (0);
614 } /* }}} int swap_read */
615 /* #endif HAVE_SWAPCTL && HAVE_SWAPCTL_TWO_ARGS */
617 #elif HAVE_SWAPCTL && HAVE_SWAPCTL_THREE_ARGS
618 static int swap_read (void) /* {{{ */
619 {
620 struct swapent *swap_entries;
621 int swap_num;
622 int status;
623 int i;
625 gauge_t used = 0;
626 gauge_t total = 0;
628 swap_num = swapctl (SWAP_NSWAP, NULL, 0);
629 if (swap_num < 0)
630 {
631 ERROR ("swap plugin: swapctl (SWAP_NSWAP) failed with status %i.",
632 swap_num);
633 return (-1);
634 }
635 else if (swap_num == 0)
636 return (0);
638 swap_entries = calloc (swap_num, sizeof (*swap_entries));
639 if (swap_entries == NULL)
640 {
641 ERROR ("swap plugin: calloc failed.");
642 return (-1);
643 }
645 status = swapctl (SWAP_STATS, swap_entries, swap_num);
646 if (status != swap_num)
647 {
648 ERROR ("swap plugin: swapctl (SWAP_STATS) failed with status %i.",
649 status);
650 sfree (swap_entries);
651 return (-1);
652 }
654 #if defined(DEV_BSIZE) && (DEV_BSIZE > 0)
655 # define C_SWAP_BLOCK_SIZE ((gauge_t) DEV_BSIZE)
656 #else
657 # define C_SWAP_BLOCK_SIZE 512.0
658 #endif
660 /* TODO: Report per-device stats. The path name is available from
661 * swap_entries[i].se_path */
662 for (i = 0; i < swap_num; i++)
663 {
664 if ((swap_entries[i].se_flags & SWF_ENABLE) == 0)
665 continue;
667 used += ((gauge_t) swap_entries[i].se_inuse) * C_SWAP_BLOCK_SIZE;
668 total += ((gauge_t) swap_entries[i].se_nblks) * C_SWAP_BLOCK_SIZE;
669 }
671 if (total < used)
672 {
673 ERROR ("swap plugin: Total swap space (%g) is less than used swap space (%g).",
674 total, used);
675 return (-1);
676 }
678 swap_submit_usage (NULL, used, total - used, NULL, NAN);
680 sfree (swap_entries);
681 return (0);
682 } /* }}} int swap_read */
683 /* #endif HAVE_SWAPCTL && HAVE_SWAPCTL_THREE_ARGS */
685 #elif defined(VM_SWAPUSAGE)
686 static int swap_read (void) /* {{{ */
687 {
688 int mib[3];
689 size_t mib_len;
690 struct xsw_usage sw_usage;
691 size_t sw_usage_len;
693 mib_len = 2;
694 mib[0] = CTL_VM;
695 mib[1] = VM_SWAPUSAGE;
697 sw_usage_len = sizeof (struct xsw_usage);
699 if (sysctl (mib, mib_len, &sw_usage, &sw_usage_len, NULL, 0) != 0)
700 return (-1);
702 /* The returned values are bytes. */
703 swap_submit_usage (NULL,
704 (gauge_t) sw_usage.xsu_used, (gauge_t) sw_usage.xsu_avail,
705 NULL, NAN);
707 return (0);
708 } /* }}} int swap_read */
709 /* #endif VM_SWAPUSAGE */
711 #elif HAVE_LIBKVM_GETSWAPINFO
712 static int swap_read (void) /* {{{ */
713 {
714 struct kvm_swap data_s;
715 int status;
717 gauge_t used;
718 gauge_t total;
720 if (kvm_obj == NULL)
721 return (-1);
723 /* only one structure => only get the grand total, no details */
724 status = kvm_getswapinfo (kvm_obj, &data_s, 1, 0);
725 if (status == -1)
726 return (-1);
728 total = (gauge_t) data_s.ksw_total;
729 used = (gauge_t) data_s.ksw_used;
731 total *= (gauge_t) kvm_pagesize;
732 used *= (gauge_t) kvm_pagesize;
734 swap_submit_usage (NULL, used, total - used, NULL, NAN);
736 return (0);
737 } /* }}} int swap_read */
738 /* #endif HAVE_LIBKVM_GETSWAPINFO */
740 #elif HAVE_LIBSTATGRAB
741 static int swap_read (void) /* {{{ */
742 {
743 sg_swap_stats *swap;
745 swap = sg_get_swap_stats ();
746 if (swap == NULL)
747 return (-1);
749 swap_submit_usage (NULL, (gauge_t) swap->used, (gauge_t) swap->free,
750 NULL, NAN);
752 return (0);
753 } /* }}} int swap_read */
754 /* #endif HAVE_LIBSTATGRAB */
756 #elif HAVE_PERFSTAT
757 static int swap_read (void) /* {{{ */
758 {
759 perfstat_memory_total_t pmemory;
760 int status;
762 gauge_t total;
763 gauge_t free;
764 gauge_t reserved;
766 memset (&pmemory, 0, sizeof (pmemory));
767 status = perfstat_memory_total (NULL, &pmemory, sizeof(perfstat_memory_total_t), 1);
768 if (status < 0)
769 {
770 char errbuf[1024];
771 WARNING ("swap plugin: perfstat_memory_total failed: %s",
772 sstrerror (errno, errbuf, sizeof (errbuf)));
773 return (-1);
774 }
776 total = (gauge_t) (pmemory.pgsp_total * pagesize);
777 free = (gauge_t) (pmemory.pgsp_free * pagesize);
778 reserved = (gauge_t) (pmemory.pgsp_rsvd * pagesize);
780 swap_submit_usage (NULL, total - free, free, "reserved", reserved);
781 swap_submit_derive ("in", (derive_t) pmemory.pgspins * pagesize);
782 swap_submit_derive ("out", (derive_t) pmemory.pgspouts * pagesize);
784 return (0);
785 } /* }}} int swap_read */
786 #endif /* HAVE_PERFSTAT */
788 void module_register (void)
789 {
790 plugin_register_complex_config ("swap", swap_config);
791 plugin_register_init ("swap", swap_init);
792 plugin_register_read ("swap", swap_read);
793 } /* void module_register */
795 /* vim: set fdm=marker : */