ae1865e7168bcb12e7f81d375c213345cf3dd199
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 const char *config_keys[] =
110 {
111 "ReportBytes",
112 "ReportByDevice",
113 "ValuesAbsolute",
114 "ValuesPercentage"
115 };
116 static int config_keys_num = STATIC_ARRAY_SIZE (config_keys);
118 static int swap_config (const char *key, const char *value) /* {{{ */
119 {
120 if (strcasecmp ("ReportBytes", key) == 0)
121 {
122 #if KERNEL_LINUX
123 report_bytes = IS_TRUE (value) ? 1 : 0;
124 #else
125 WARNING ("swap plugin: The \"ReportBytes\" option is only "
126 "valid under Linux. "
127 "The option is going to be ignored.");
128 #endif
129 }
130 else if (strcasecmp ("ReportByDevice", key) == 0)
131 {
132 #if SWAP_HAVE_REPORT_BY_DEVICE
133 if (IS_TRUE (value))
134 report_by_device = 1;
135 else
136 report_by_device = 0;
137 #else
138 WARNING ("swap plugin: The \"ReportByDevice\" option is not "
139 "supported on this platform. "
140 "The option is going to be ignored.");
141 #endif /* SWAP_HAVE_REPORT_BY_DEVICE */
142 }
143 else if (strcasecmp (key, "ValuesAbsolute") == 0)
144 {
145 if (IS_TRUE (value))
146 values_absolute = 1;
147 else
148 values_absolute = 0;
150 return (0);
151 }
152 else if (strcasecmp (key, "ValuesPercentage") == 0)
153 {
154 if (IS_TRUE (value))
155 values_percentage = 1;
156 else
157 values_percentage = 0;
159 return (0);
160 }
161 else
162 {
163 return (-1);
164 }
166 return (0);
167 } /* }}} int swap_config */
169 static int swap_init (void) /* {{{ */
170 {
171 #if KERNEL_LINUX
172 pagesize = (derive_t) sysconf (_SC_PAGESIZE);
173 /* #endif KERNEL_LINUX */
175 #elif HAVE_SWAPCTL && HAVE_SWAPCTL_TWO_ARGS
176 /* getpagesize(3C) tells me this does not fail.. */
177 pagesize = (derive_t) getpagesize ();
178 /* #endif HAVE_SWAPCTL */
180 #elif defined(VM_SWAPUSAGE)
181 /* No init stuff */
182 /* #endif defined(VM_SWAPUSAGE) */
184 #elif HAVE_LIBKVM_GETSWAPINFO
185 if (kvm_obj != NULL)
186 {
187 kvm_close (kvm_obj);
188 kvm_obj = NULL;
189 }
191 kvm_pagesize = getpagesize ();
193 if ((kvm_obj = kvm_open (NULL, /* execfile */
194 NULL, /* corefile */
195 NULL, /* swapfile */
196 O_RDONLY, /* flags */
197 NULL)) /* errstr */
198 == NULL)
199 {
200 ERROR ("swap plugin: kvm_open failed.");
201 return (-1);
202 }
203 /* #endif HAVE_LIBKVM_GETSWAPINFO */
205 #elif HAVE_LIBSTATGRAB
206 /* No init stuff */
207 /* #endif HAVE_LIBSTATGRAB */
209 #elif HAVE_PERFSTAT
210 pagesize = getpagesize();
211 #endif /* HAVE_PERFSTAT */
213 return (0);
214 } /* }}} int swap_init */
216 static void swap_submit (const char *plugin_instance, /* {{{ */
217 const char *type, const char *type_instance,
218 value_t value)
219 {
220 value_list_t vl = VALUE_LIST_INIT;
222 assert (type != NULL);
224 vl.values = &value;
225 vl.values_len = 1;
226 sstrncpy (vl.host, hostname_g, sizeof (vl.host));
227 sstrncpy (vl.plugin, "swap", sizeof (vl.plugin));
228 if (plugin_instance != NULL)
229 sstrncpy (vl.plugin_instance, plugin_instance, sizeof (vl.plugin_instance));
230 sstrncpy (vl.type, type, sizeof (vl.type));
231 if (type_instance != NULL)
232 sstrncpy (vl.type_instance, type_instance, sizeof (vl.type_instance));
234 plugin_dispatch_values (&vl);
235 } /* }}} void swap_submit_inst */
237 static void swap_submit_usage (char const *plugin_instance, /* {{{ */
238 gauge_t used, gauge_t free,
239 char const *other_name, gauge_t other_value)
240 {
241 value_t v[1];
242 value_list_t vl = VALUE_LIST_INIT;
244 vl.values = v;
245 vl.values_len = STATIC_ARRAY_SIZE (v);
246 sstrncpy (vl.host, hostname_g, sizeof (vl.host));
247 sstrncpy (vl.plugin, "swap", sizeof (vl.plugin));
248 if (plugin_instance != NULL)
249 sstrncpy (vl.plugin_instance, plugin_instance,
250 sizeof (vl.plugin_instance));
251 sstrncpy (vl.type, "swap", sizeof (vl.type));
253 if (values_absolute)
254 plugin_dispatch_multivalue (&vl, 0,
255 "used", used, "free", free,
256 other_name, other_value, NULL);
257 if (values_percentage)
258 plugin_dispatch_multivalue (&vl, 1,
259 "used", used, "free", free,
260 other_name, other_value, NULL);
261 } /* }}} void swap_submit_usage */
263 #if KERNEL_LINUX || HAVE_PERFSTAT
264 static void swap_submit_derive (const char *plugin_instance, /* {{{ */
265 const char *type_instance, derive_t value)
266 {
267 value_t v;
269 v.derive = value;
270 swap_submit (plugin_instance, "swap_io", type_instance, v);
271 } /* }}} void swap_submit_derive */
272 #endif
274 #if KERNEL_LINUX
275 static int swap_read_separate (void) /* {{{ */
276 {
277 FILE *fh;
278 char buffer[1024];
280 fh = fopen ("/proc/swaps", "r");
281 if (fh == NULL)
282 {
283 char errbuf[1024];
284 WARNING ("swap plugin: fopen (/proc/swaps) failed: %s",
285 sstrerror (errno, errbuf, sizeof (errbuf)));
286 return (-1);
287 }
289 while (fgets (buffer, sizeof (buffer), fh) != NULL)
290 {
291 char *fields[8];
292 int numfields;
293 char *endptr;
295 char path[PATH_MAX];
296 gauge_t total;
297 gauge_t used;
299 numfields = strsplit (buffer, fields, STATIC_ARRAY_SIZE (fields));
300 if (numfields != 5)
301 continue;
303 sstrncpy (path, fields[0], sizeof (path));
304 escape_slashes (path, sizeof (path));
306 errno = 0;
307 endptr = NULL;
308 total = strtod (fields[2], &endptr);
309 if ((endptr == fields[2]) || (errno != 0))
310 continue;
312 errno = 0;
313 endptr = NULL;
314 used = strtod (fields[3], &endptr);
315 if ((endptr == fields[3]) || (errno != 0))
316 continue;
318 if (total < used)
319 continue;
321 swap_submit_usage (path, used, total - used, NULL, NAN);
322 }
324 fclose (fh);
326 return (0);
327 } /* }}} int swap_read_separate */
329 static int swap_read_combined (void) /* {{{ */
330 {
331 FILE *fh;
332 char buffer[1024];
334 uint8_t have_data = 0;
335 gauge_t swap_used = 0.0;
336 gauge_t swap_cached = 0.0;
337 gauge_t swap_free = 0.0;
338 gauge_t swap_total = 0.0;
340 fh = fopen ("/proc/meminfo", "r");
341 if (fh == NULL)
342 {
343 char errbuf[1024];
344 WARNING ("swap plugin: fopen (/proc/meminfo) failed: %s",
345 sstrerror (errno, errbuf, sizeof (errbuf)));
346 return (-1);
347 }
349 while (fgets (buffer, sizeof (buffer), fh) != NULL)
350 {
351 char *fields[8];
352 int numfields;
354 numfields = strsplit (buffer, fields, STATIC_ARRAY_SIZE (fields));
355 if (numfields < 2)
356 continue;
358 if (strcasecmp (fields[0], "SwapTotal:") == 0)
359 {
360 swap_total = strtod (fields[1], /* endptr = */ NULL);
361 have_data |= 0x01;
362 }
363 else if (strcasecmp (fields[0], "SwapFree:") == 0)
364 {
365 swap_free = strtod (fields[1], /* endptr = */ NULL);
366 have_data |= 0x02;
367 }
368 else if (strcasecmp (fields[0], "SwapCached:") == 0)
369 {
370 swap_cached = strtod (fields[1], /* endptr = */ NULL);
371 have_data |= 0x04;
372 }
373 }
375 fclose (fh);
377 if (have_data != 0x07)
378 return (ENOENT);
380 if (isnan (swap_total)
381 || (swap_total <= 0.0)
382 || ((swap_free + swap_cached) > swap_total))
383 return (EINVAL);
385 swap_used = swap_total - (swap_free + swap_cached);
387 swap_submit_usage (NULL, swap_used, swap_free, "cached", swap_cached);
388 return (0);
389 } /* }}} int swap_read_combined */
391 static int swap_read_io (void) /* {{{ */
392 {
393 FILE *fh;
394 char buffer[1024];
396 _Bool old_kernel = 0;
398 uint8_t have_data = 0;
399 derive_t swap_in = 0;
400 derive_t swap_out = 0;
402 fh = fopen ("/proc/vmstat", "r");
403 if (fh == NULL)
404 {
405 /* /proc/vmstat does not exist in kernels <2.6 */
406 fh = fopen ("/proc/stat", "r");
407 if (fh == NULL)
408 {
409 char errbuf[1024];
410 WARNING ("swap: fopen: %s",
411 sstrerror (errno, errbuf, sizeof (errbuf)));
412 return (-1);
413 }
414 else
415 old_kernel = 1;
416 }
418 while (fgets (buffer, sizeof (buffer), fh) != NULL)
419 {
420 char *fields[8];
421 int numfields;
423 numfields = strsplit (buffer, fields, STATIC_ARRAY_SIZE (fields));
425 if (!old_kernel)
426 {
427 if (numfields != 2)
428 continue;
430 if (strcasecmp ("pswpin", fields[0]) == 0)
431 {
432 strtoderive (fields[1], &swap_in);
433 have_data |= 0x01;
434 }
435 else if (strcasecmp ("pswpout", fields[0]) == 0)
436 {
437 strtoderive (fields[1], &swap_out);
438 have_data |= 0x02;
439 }
440 }
441 else /* if (old_kernel) */
442 {
443 if (numfields != 3)
444 continue;
446 if (strcasecmp ("page", fields[0]) == 0)
447 {
448 strtoderive (fields[1], &swap_in);
449 strtoderive (fields[2], &swap_out);
450 }
451 }
452 } /* while (fgets) */
454 fclose (fh);
456 if (have_data != 0x03)
457 return (ENOENT);
459 if (report_bytes)
460 {
461 swap_in = swap_in * pagesize;
462 swap_out = swap_out * pagesize;
463 }
465 swap_submit_derive (NULL, "in", swap_in);
466 swap_submit_derive (NULL, "out", swap_out);
468 return (0);
469 } /* }}} int swap_read_io */
471 static int swap_read (void) /* {{{ */
472 {
473 if (report_by_device)
474 swap_read_separate ();
475 else
476 swap_read_combined ();
478 swap_read_io ();
480 return (0);
481 } /* }}} int swap_read */
482 /* #endif KERNEL_LINUX */
484 /*
485 * Under Solaris, two mechanisms can be used to read swap statistics, swapctl
486 * and kstat. The former reads physical space used on a device, the latter
487 * reports the view from the virtual memory system. It was decided that the
488 * kstat-based information should be moved to the "vmem" plugin, but nobody
489 * with enough Solaris experience was available at that time to do this. The
490 * code below is still there for your reference but it won't be activated in
491 * *this* plugin again. --octo
492 */
493 #elif 0 && HAVE_LIBKSTAT
494 /* kstat-based read function */
495 static int swap_read_kstat (void) /* {{{ */
496 {
497 gauge_t swap_alloc;
498 gauge_t swap_resv;
499 gauge_t swap_avail;
501 struct anoninfo ai;
503 if (swapctl (SC_AINFO, &ai) == -1)
504 {
505 char errbuf[1024];
506 ERROR ("swap plugin: swapctl failed: %s",
507 sstrerror (errno, errbuf, sizeof (errbuf)));
508 return (-1);
509 }
511 /*
512 * Calculations from:
513 * http://cvs.opensolaris.org/source/xref/on/usr/src/cmd/swap/swap.c
514 * Also see:
515 * http://www.itworld.com/Comp/2377/UIR980701perf/ (outdated?)
516 * /usr/include/vm/anon.h
517 *
518 * In short, swap -s shows: allocated + reserved = used, available
519 *
520 * However, Solaris does not allow to allocated/reserved more than the
521 * available swap (physical memory + disk swap), so the pedant may
522 * prefer: allocated + unallocated = reserved, available
523 *
524 * We map the above to: used + resv = n/a, free
525 *
526 * Does your brain hurt yet? - Christophe Kalt
527 *
528 * Oh, and in case you wonder,
529 * swap_alloc = pagesize * ( ai.ani_max - ai.ani_free );
530 * can suffer from a 32bit overflow.
531 */
532 swap_alloc = (gauge_t) ((ai.ani_max - ai.ani_free) * pagesize);
533 swap_resv = (gauge_t) ((ai.ani_resv + ai.ani_free - ai.ani_max) * pagesize);
534 swap_avail = (gauge_t) ((ai.ani_max - ai.ani_resv) * pagesize);
536 swap_submit_usage (NULL, swap_alloc, swap_avail, "reserved", swap_resv);
537 return (0);
538 } /* }}} int swap_read_kstat */
539 /* #endif 0 && HAVE_LIBKSTAT */
541 #elif HAVE_SWAPCTL && HAVE_SWAPCTL_TWO_ARGS
542 /* swapctl-based read function */
543 static int swap_read (void) /* {{{ */
544 {
545 swaptbl_t *s;
546 char *s_paths;
547 int swap_num;
548 int status;
549 int i;
551 gauge_t avail = 0;
552 gauge_t total = 0;
554 swap_num = swapctl (SC_GETNSWP, NULL);
555 if (swap_num < 0)
556 {
557 ERROR ("swap plugin: swapctl (SC_GETNSWP) failed with status %i.",
558 swap_num);
559 return (-1);
560 }
561 else if (swap_num == 0)
562 return (0);
564 /* Allocate and initialize the swaptbl_t structure */
565 s = (swaptbl_t *) smalloc (swap_num * sizeof (swapent_t) + sizeof (struct swaptable));
566 if (s == NULL)
567 {
568 ERROR ("swap plugin: smalloc failed.");
569 return (-1);
570 }
572 /* Memory to store the path names. We only use these paths when the
573 * separate option has been configured, but it's easier to just
574 * allocate enough memory in any case. */
575 s_paths = calloc (swap_num, PATH_MAX);
576 if (s_paths == NULL)
577 {
578 ERROR ("swap plugin: malloc failed.");
579 sfree (s);
580 return (-1);
581 }
582 for (i = 0; i < swap_num; i++)
583 s->swt_ent[i].ste_path = s_paths + (i * PATH_MAX);
584 s->swt_n = swap_num;
586 status = swapctl (SC_LIST, s);
587 if (status < 0)
588 {
589 char errbuf[1024];
590 ERROR ("swap plugin: swapctl (SC_LIST) failed: %s",
591 sstrerror (errno, errbuf, sizeof (errbuf)));
592 sfree (s_paths);
593 sfree (s);
594 return (-1);
595 }
596 else if (swap_num < status)
597 {
598 /* more elements returned than requested */
599 ERROR ("swap plugin: I allocated memory for %i structure%s, "
600 "but swapctl(2) claims to have returned %i. "
601 "I'm confused and will give up.",
602 swap_num, (swap_num == 1) ? "" : "s",
603 status);
604 sfree (s_paths);
605 sfree (s);
606 return (-1);
607 }
608 else if (swap_num > status)
609 /* less elements returned than requested */
610 swap_num = status;
612 for (i = 0; i < swap_num; i++)
613 {
614 char path[PATH_MAX];
615 gauge_t this_total;
616 gauge_t this_avail;
618 if ((s->swt_ent[i].ste_flags & ST_INDEL) != 0)
619 continue;
621 this_total = (gauge_t) (s->swt_ent[i].ste_pages * pagesize);
622 this_avail = (gauge_t) (s->swt_ent[i].ste_free * pagesize);
624 /* Shortcut for the "combined" setting (default) */
625 if (!report_by_device)
626 {
627 avail += this_avail;
628 total += this_total;
629 continue;
630 }
632 sstrncpy (path, s->swt_ent[i].ste_path, sizeof (path));
633 escape_slashes (path, sizeof (path));
635 swap_submit_usage (path, this_total - this_avail, this_avail,
636 NULL, NAN);
637 } /* for (swap_num) */
639 if (total < avail)
640 {
641 ERROR ("swap plugin: Total swap space (%g) is less than free swap space (%g).",
642 total, avail);
643 sfree (s_paths);
644 sfree (s);
645 return (-1);
646 }
648 /* If the "separate" option was specified (report_by_device == 1), all
649 * values have already been dispatched from within the loop. */
650 if (!report_by_device)
651 swap_submit_usage (NULL, total - avail, avail, NULL, NAN);
653 sfree (s_paths);
654 sfree (s);
655 return (0);
656 } /* }}} int swap_read */
657 /* #endif HAVE_SWAPCTL && HAVE_SWAPCTL_TWO_ARGS */
659 #elif HAVE_SWAPCTL && HAVE_SWAPCTL_THREE_ARGS
660 static int swap_read (void) /* {{{ */
661 {
662 struct swapent *swap_entries;
663 int swap_num;
664 int status;
665 int i;
667 gauge_t used = 0;
668 gauge_t total = 0;
670 swap_num = swapctl (SWAP_NSWAP, NULL, 0);
671 if (swap_num < 0)
672 {
673 ERROR ("swap plugin: swapctl (SWAP_NSWAP) failed with status %i.",
674 swap_num);
675 return (-1);
676 }
677 else if (swap_num == 0)
678 return (0);
680 swap_entries = calloc (swap_num, sizeof (*swap_entries));
681 if (swap_entries == NULL)
682 {
683 ERROR ("swap plugin: calloc failed.");
684 return (-1);
685 }
687 status = swapctl (SWAP_STATS, swap_entries, swap_num);
688 if (status != swap_num)
689 {
690 ERROR ("swap plugin: swapctl (SWAP_STATS) failed with status %i.",
691 status);
692 sfree (swap_entries);
693 return (-1);
694 }
696 #if defined(DEV_BSIZE) && (DEV_BSIZE > 0)
697 # define C_SWAP_BLOCK_SIZE ((gauge_t) DEV_BSIZE)
698 #else
699 # define C_SWAP_BLOCK_SIZE 512.0
700 #endif
702 /* TODO: Report per-device stats. The path name is available from
703 * swap_entries[i].se_path */
704 for (i = 0; i < swap_num; i++)
705 {
706 if ((swap_entries[i].se_flags & SWF_ENABLE) == 0)
707 continue;
709 used += ((gauge_t) swap_entries[i].se_inuse) * C_SWAP_BLOCK_SIZE;
710 total += ((gauge_t) swap_entries[i].se_nblks) * C_SWAP_BLOCK_SIZE;
711 }
713 if (total < used)
714 {
715 ERROR ("swap plugin: Total swap space (%g) is less than used swap space (%g).",
716 total, used);
717 return (-1);
718 }
720 swap_submit_usage (NULL, used, total - used, NULL, NAN);
722 sfree (swap_entries);
723 return (0);
724 } /* }}} int swap_read */
725 /* #endif HAVE_SWAPCTL && HAVE_SWAPCTL_THREE_ARGS */
727 #elif defined(VM_SWAPUSAGE)
728 static int swap_read (void) /* {{{ */
729 {
730 int mib[3];
731 size_t mib_len;
732 struct xsw_usage sw_usage;
733 size_t sw_usage_len;
735 mib_len = 2;
736 mib[0] = CTL_VM;
737 mib[1] = VM_SWAPUSAGE;
739 sw_usage_len = sizeof (struct xsw_usage);
741 if (sysctl (mib, mib_len, &sw_usage, &sw_usage_len, NULL, 0) != 0)
742 return (-1);
744 /* The returned values are bytes. */
745 swap_submit_usage (NULL,
746 (gauge_t) sw_usage.xsu_used, (gauge_t) sw_usage.xsu_avail,
747 NULL, NAN);
749 return (0);
750 } /* }}} int swap_read */
751 /* #endif VM_SWAPUSAGE */
753 #elif HAVE_LIBKVM_GETSWAPINFO
754 static int swap_read (void) /* {{{ */
755 {
756 struct kvm_swap data_s;
757 int status;
759 gauge_t used;
760 gauge_t total;
762 if (kvm_obj == NULL)
763 return (-1);
765 /* only one structure => only get the grand total, no details */
766 status = kvm_getswapinfo (kvm_obj, &data_s, 1, 0);
767 if (status == -1)
768 return (-1);
770 total = (gauge_t) data_s.ksw_total;
771 used = (gauge_t) data_s.ksw_used;
773 total *= (gauge_t) kvm_pagesize;
774 used *= (gauge_t) kvm_pagesize;
776 swap_submit_usage (NULL, used, total - used, NULL, NAN);
778 return (0);
779 } /* }}} int swap_read */
780 /* #endif HAVE_LIBKVM_GETSWAPINFO */
782 #elif HAVE_LIBSTATGRAB
783 static int swap_read (void) /* {{{ */
784 {
785 sg_swap_stats *swap;
787 swap = sg_get_swap_stats ();
788 if (swap == NULL)
789 return (-1);
791 swap_submit_usage (NULL, (gauge_t) swap->used, (gauge_t) swap->free,
792 NULL, NAN);
794 return (0);
795 } /* }}} int swap_read */
796 /* #endif HAVE_LIBSTATGRAB */
798 #elif HAVE_PERFSTAT
799 static int swap_read (void) /* {{{ */
800 {
801 perfstat_memory_total_t pmemory;
802 int status;
804 gauge_t total;
805 gauge_t free;
806 gauge_t reserved;
808 memset (&pmemory, 0, sizeof (pmemory));
809 status = perfstat_memory_total (NULL, &pmemory, sizeof(perfstat_memory_total_t), 1);
810 if (status < 0)
811 {
812 char errbuf[1024];
813 WARNING ("swap plugin: perfstat_memory_total failed: %s",
814 sstrerror (errno, errbuf, sizeof (errbuf)));
815 return (-1);
816 }
818 total = (gauge_t) (pmemory.pgsp_total * pagesize);
819 free = (gauge_t) (pmemory.pgsp_free * pagesize);
820 reserved = (gauge_t) (pmemory.pgsp_rsvd * pagesize);
822 swap_submit_usage (NULL, total - free, free, "reserved", reserved);
823 swap_submit_derive (NULL, "in", (derive_t) pmemory.pgspins * pagesize);
824 swap_submit_derive (NULL, "out", (derive_t) pmemory.pgspouts * pagesize);
826 return (0);
827 } /* }}} int swap_read */
828 #endif /* HAVE_PERFSTAT */
830 void module_register (void)
831 {
832 plugin_register_config ("swap", swap_config,
833 config_keys, config_keys_num);
834 plugin_register_init ("swap", swap_init);
835 plugin_register_read ("swap", swap_read);
836 } /* void module_register */
838 /* vim: set fdm=marker : */