8d8f7525d1d3ced55c6ff1b8539043ab29223f72
1 /**
2 * collectd - src/swap.c
3 * Copyright (C) 2005-2012 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 static perfstat_memory_total_t pmemory;
101 /*# endif HAVE_PERFSTAT */
103 #else
104 # error "No applicable input method."
105 #endif /* HAVE_LIBSTATGRAB */
107 static const char *config_keys[] =
108 {
109 "ReportBytes",
110 "ReportByDevice"
111 };
112 static int config_keys_num = STATIC_ARRAY_SIZE (config_keys);
114 static int swap_config (const char *key, const char *value) /* {{{ */
115 {
116 if (strcasecmp ("ReportBytes", key) == 0)
117 {
118 #if KERNEL_LINUX
119 report_bytes = IS_TRUE (value) ? 1 : 0;
120 #else
121 WARNING ("swap plugin: The \"ReportBytes\" option is only "
122 "valid under Linux. "
123 "The option is going to be ignored.");
124 #endif
125 }
126 else if (strcasecmp ("ReportByDevice", key) == 0)
127 {
128 #if SWAP_HAVE_REPORT_BY_DEVICE
129 if (IS_TRUE (value))
130 report_by_device = 1;
131 else
132 report_by_device = 0;
133 #else
134 WARNING ("swap plugin: The \"ReportByDevice\" option is not "
135 "supported on this platform. "
136 "The option is going to be ignored.");
137 #endif /* SWAP_HAVE_REPORT_BY_DEVICE */
138 }
139 else
140 {
141 return (-1);
142 }
144 return (0);
145 } /* }}} int swap_config */
147 static int swap_init (void) /* {{{ */
148 {
149 #if KERNEL_LINUX
150 pagesize = (derive_t) sysconf (_SC_PAGESIZE);
151 /* #endif KERNEL_LINUX */
153 #elif HAVE_SWAPCTL && HAVE_SWAPCTL_TWO_ARGS
154 /* getpagesize(3C) tells me this does not fail.. */
155 pagesize = (derive_t) getpagesize ();
156 /* #endif HAVE_SWAPCTL */
158 #elif defined(VM_SWAPUSAGE)
159 /* No init stuff */
160 /* #endif defined(VM_SWAPUSAGE) */
162 #elif HAVE_LIBKVM_GETSWAPINFO
163 char errbuf[_POSIX2_LINE_MAX];
165 if (kvm_obj != NULL)
166 {
167 kvm_close (kvm_obj);
168 kvm_obj = NULL;
169 }
171 kvm_pagesize = getpagesize ();
173 kvm_obj = kvm_openfiles (NULL, "/dev/null", NULL, O_RDONLY, errbuf);
175 if (kvm_obj == NULL)
176 {
177 ERROR ("swap plugin: kvm_openfiles failed, %s", errbuf);
178 return (-1);
179 }
180 /* #endif HAVE_LIBKVM_GETSWAPINFO */
182 #elif HAVE_LIBSTATGRAB
183 /* No init stuff */
184 /* #endif HAVE_LIBSTATGRAB */
186 #elif HAVE_PERFSTAT
187 pagesize = getpagesize();
188 #endif /* HAVE_PERFSTAT */
190 return (0);
191 } /* }}} int swap_init */
193 static void swap_submit (const char *plugin_instance, /* {{{ */
194 const char *type, const char *type_instance,
195 value_t value)
196 {
197 value_list_t vl = VALUE_LIST_INIT;
199 assert (type != NULL);
201 vl.values = &value;
202 vl.values_len = 1;
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, sizeof (vl.plugin_instance));
207 sstrncpy (vl.type, type, sizeof (vl.type));
208 if (type_instance != NULL)
209 sstrncpy (vl.type_instance, type_instance, sizeof (vl.type_instance));
211 plugin_dispatch_values (&vl);
212 } /* }}} void swap_submit_inst */
214 static void swap_submit_gauge (const char *plugin_instance, /* {{{ */
215 const char *type_instance, gauge_t value)
216 {
217 value_t v;
219 v.gauge = value;
220 swap_submit (plugin_instance, "swap", type_instance, v);
221 } /* }}} void swap_submit_gauge */
223 #if KERNEL_LINUX || HAVE_PERFSTAT
224 static void swap_submit_derive (const char *plugin_instance, /* {{{ */
225 const char *type_instance, derive_t value)
226 {
227 value_t v;
229 v.derive = value;
230 swap_submit (plugin_instance, "swap_io", type_instance, v);
231 } /* }}} void swap_submit_derive */
232 #endif
234 #if KERNEL_LINUX
235 static int swap_read_separate (void) /* {{{ */
236 {
237 FILE *fh;
238 char buffer[1024];
240 fh = fopen ("/proc/swaps", "r");
241 if (fh == NULL)
242 {
243 char errbuf[1024];
244 WARNING ("swap plugin: fopen (/proc/swaps) failed: %s",
245 sstrerror (errno, errbuf, sizeof (errbuf)));
246 return (-1);
247 }
249 while (fgets (buffer, sizeof (buffer), fh) != NULL)
250 {
251 char *fields[8];
252 int numfields;
253 char *endptr;
255 char path[PATH_MAX];
256 gauge_t size;
257 gauge_t used;
258 gauge_t free;
260 numfields = strsplit (buffer, fields, STATIC_ARRAY_SIZE (fields));
261 if (numfields != 5)
262 continue;
264 sstrncpy (path, fields[0], sizeof (path));
265 escape_slashes (path, sizeof (path));
267 errno = 0;
268 endptr = NULL;
269 size = strtod (fields[2], &endptr);
270 if ((endptr == fields[2]) || (errno != 0))
271 continue;
273 errno = 0;
274 endptr = NULL;
275 used = strtod (fields[3], &endptr);
276 if ((endptr == fields[3]) || (errno != 0))
277 continue;
279 if (size < used)
280 continue;
282 free = size - used;
284 swap_submit_gauge (path, "used", used);
285 swap_submit_gauge (path, "free", free);
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 uint8_t have_data = 0;
299 gauge_t swap_used = 0.0;
300 gauge_t swap_cached = 0.0;
301 gauge_t swap_free = 0.0;
302 gauge_t swap_total = 0.0;
304 fh = fopen ("/proc/meminfo", "r");
305 if (fh == NULL)
306 {
307 char errbuf[1024];
308 WARNING ("swap plugin: fopen (/proc/meminfo) failed: %s",
309 sstrerror (errno, errbuf, sizeof (errbuf)));
310 return (-1);
311 }
313 while (fgets (buffer, sizeof (buffer), fh) != NULL)
314 {
315 char *fields[8];
316 int numfields;
318 numfields = strsplit (buffer, fields, STATIC_ARRAY_SIZE (fields));
319 if (numfields < 2)
320 continue;
322 if (strcasecmp (fields[0], "SwapTotal:") == 0)
323 {
324 swap_total = strtod (fields[1], /* endptr = */ NULL);
325 have_data |= 0x01;
326 }
327 else if (strcasecmp (fields[0], "SwapFree:") == 0)
328 {
329 swap_free = strtod (fields[1], /* endptr = */ NULL);
330 have_data |= 0x02;
331 }
332 else if (strcasecmp (fields[0], "SwapCached:") == 0)
333 {
334 swap_cached = strtod (fields[1], /* endptr = */ NULL);
335 have_data |= 0x04;
336 }
337 }
339 fclose (fh);
341 if ((have_data & 0x03) != 0x03)
342 return (ENOENT);
344 if (isnan (swap_total)
345 || (swap_total <= 0.0)
346 || ((swap_free + swap_cached) > swap_total))
347 return (EINVAL);
349 swap_used = swap_total - (swap_free + swap_cached);
351 swap_submit_gauge (NULL, "used", 1024.0 * swap_used);
352 swap_submit_gauge (NULL, "free", 1024.0 * swap_free);
353 if (have_data & 0x04)
354 swap_submit_gauge (NULL, "cached", 1024.0 * swap_cached);
356 return (0);
357 } /* }}} int swap_read_combined */
359 static int swap_read_io (void) /* {{{ */
360 {
361 FILE *fh;
362 char buffer[1024];
364 _Bool old_kernel = 0;
366 uint8_t have_data = 0;
367 derive_t swap_in = 0;
368 derive_t swap_out = 0;
370 fh = fopen ("/proc/vmstat", "r");
371 if (fh == NULL)
372 {
373 /* /proc/vmstat does not exist in kernels <2.6 */
374 fh = fopen ("/proc/stat", "r");
375 if (fh == NULL)
376 {
377 char errbuf[1024];
378 WARNING ("swap: fopen: %s",
379 sstrerror (errno, errbuf, sizeof (errbuf)));
380 return (-1);
381 }
382 else
383 old_kernel = 1;
384 }
386 while (fgets (buffer, sizeof (buffer), fh) != NULL)
387 {
388 char *fields[8];
389 int numfields;
391 numfields = strsplit (buffer, fields, STATIC_ARRAY_SIZE (fields));
393 if (!old_kernel)
394 {
395 if (numfields != 2)
396 continue;
398 if (strcasecmp ("pswpin", fields[0]) == 0)
399 {
400 strtoderive (fields[1], &swap_in);
401 have_data |= 0x01;
402 }
403 else if (strcasecmp ("pswpout", fields[0]) == 0)
404 {
405 strtoderive (fields[1], &swap_out);
406 have_data |= 0x02;
407 }
408 }
409 else /* if (old_kernel) */
410 {
411 if (numfields != 3)
412 continue;
414 if (strcasecmp ("page", fields[0]) == 0)
415 {
416 strtoderive (fields[1], &swap_in);
417 strtoderive (fields[2], &swap_out);
418 }
419 }
420 } /* while (fgets) */
422 fclose (fh);
424 if (have_data != 0x03)
425 return (ENOENT);
427 if (report_bytes)
428 {
429 swap_in = swap_in * pagesize;
430 swap_out = swap_out * pagesize;
431 }
433 swap_submit_derive (NULL, "in", swap_in);
434 swap_submit_derive (NULL, "out", swap_out);
436 return (0);
437 } /* }}} int swap_read_io */
439 static int swap_read (void) /* {{{ */
440 {
441 if (report_by_device)
442 swap_read_separate ();
443 else
444 swap_read_combined ();
446 swap_read_io ();
448 return (0);
449 } /* }}} int swap_read */
450 /* #endif KERNEL_LINUX */
452 /*
453 * Under Solaris, two mechanisms can be used to read swap statistics, swapctl
454 * and kstat. The former reads physical space used on a device, the latter
455 * reports the view from the virtual memory system. It was decided that the
456 * kstat-based information should be moved to the "vmem" plugin, but nobody
457 * with enough Solaris experience was available at that time to do this. The
458 * code below is still there for your reference but it won't be activated in
459 * *this* plugin again. --octo
460 */
461 #elif 0 && HAVE_LIBKSTAT
462 /* kstat-based read function */
463 static int swap_read_kstat (void) /* {{{ */
464 {
465 derive_t swap_alloc;
466 derive_t swap_resv;
467 derive_t swap_avail;
469 struct anoninfo ai;
471 if (swapctl (SC_AINFO, &ai) == -1)
472 {
473 char errbuf[1024];
474 ERROR ("swap plugin: swapctl failed: %s",
475 sstrerror (errno, errbuf, sizeof (errbuf)));
476 return (-1);
477 }
479 /*
480 * Calculations from:
481 * http://cvs.opensolaris.org/source/xref/on/usr/src/cmd/swap/swap.c
482 * Also see:
483 * http://www.itworld.com/Comp/2377/UIR980701perf/ (outdated?)
484 * /usr/include/vm/anon.h
485 *
486 * In short, swap -s shows: allocated + reserved = used, available
487 *
488 * However, Solaris does not allow to allocated/reserved more than the
489 * available swap (physical memory + disk swap), so the pedant may
490 * prefer: allocated + unallocated = reserved, available
491 *
492 * We map the above to: used + resv = n/a, free
493 *
494 * Does your brain hurt yet? - Christophe Kalt
495 *
496 * Oh, and in case you wonder,
497 * swap_alloc = pagesize * ( ai.ani_max - ai.ani_free );
498 * can suffer from a 32bit overflow.
499 */
500 swap_alloc = (derive_t) ((ai.ani_max - ai.ani_free) * pagesize);
501 swap_resv = (derive_t) ((ai.ani_resv + ai.ani_free - ai.ani_max)
502 * pagesize);
503 swap_avail = (derive_t) ((ai.ani_max - ai.ani_resv) * pagesize);
505 swap_submit_gauge (NULL, "used", swap_alloc);
506 swap_submit_gauge (NULL, "free", swap_avail);
507 swap_submit_gauge (NULL, "reserved", swap_resv);
509 return (0);
510 } /* }}} int swap_read_kstat */
511 /* #endif 0 && HAVE_LIBKSTAT */
513 #elif HAVE_SWAPCTL && HAVE_SWAPCTL_TWO_ARGS
514 /* swapctl-based read function */
515 static int swap_read (void) /* {{{ */
516 {
517 swaptbl_t *s;
518 char *s_paths;
519 int swap_num;
520 int status;
521 int i;
523 derive_t avail = 0;
524 derive_t total = 0;
526 swap_num = swapctl (SC_GETNSWP, NULL);
527 if (swap_num < 0)
528 {
529 ERROR ("swap plugin: swapctl (SC_GETNSWP) failed with status %i.",
530 swap_num);
531 return (-1);
532 }
533 else if (swap_num == 0)
534 return (0);
536 /* Allocate and initialize the swaptbl_t structure */
537 s = malloc (swap_num * sizeof (swapent_t) + sizeof (struct swaptable));
538 if (s == NULL)
539 {
540 ERROR ("swap plugin: malloc failed.");
541 return (-1);
542 }
544 /* Memory to store the path names. We only use these paths when the
545 * separate option has been configured, but it's easier to just
546 * allocate enough memory in any case. */
547 s_paths = calloc (swap_num, PATH_MAX);
548 if (s_paths == NULL)
549 {
550 ERROR ("swap plugin: calloc failed.");
551 sfree (s);
552 return (-1);
553 }
554 for (i = 0; i < swap_num; i++)
555 s->swt_ent[i].ste_path = s_paths + (i * PATH_MAX);
556 s->swt_n = swap_num;
558 status = swapctl (SC_LIST, s);
559 if (status < 0)
560 {
561 char errbuf[1024];
562 ERROR ("swap plugin: swapctl (SC_LIST) failed: %s",
563 sstrerror (errno, errbuf, sizeof (errbuf)));
564 sfree (s_paths);
565 sfree (s);
566 return (-1);
567 }
568 else if (swap_num < status)
569 {
570 /* more elements returned than requested */
571 ERROR ("swap plugin: I allocated memory for %i structure%s, "
572 "but swapctl(2) claims to have returned %i. "
573 "I'm confused and will give up.",
574 swap_num, (swap_num == 1) ? "" : "s",
575 status);
576 sfree (s_paths);
577 sfree (s);
578 return (-1);
579 }
580 else if (swap_num > status)
581 /* less elements returned than requested */
582 swap_num = status;
584 for (i = 0; i < swap_num; i++)
585 {
586 char path[PATH_MAX];
587 derive_t this_total;
588 derive_t this_avail;
590 if ((s->swt_ent[i].ste_flags & ST_INDEL) != 0)
591 continue;
593 this_total = ((derive_t) s->swt_ent[i].ste_pages) * pagesize;
594 this_avail = ((derive_t) s->swt_ent[i].ste_free) * pagesize;
596 /* Shortcut for the "combined" setting (default) */
597 if (!report_by_device)
598 {
599 avail += this_avail;
600 total += this_total;
601 continue;
602 }
604 sstrncpy (path, s->swt_ent[i].ste_path, sizeof (path));
605 escape_slashes (path, sizeof (path));
607 swap_submit_gauge (path, "used", (gauge_t) (this_total - this_avail));
608 swap_submit_gauge (path, "free", (gauge_t) this_avail);
609 } /* for (swap_num) */
611 if (total < avail)
612 {
613 ERROR ("swap plugin: Total swap space (%"PRIi64") "
614 "is less than free swap space (%"PRIi64").",
615 total, avail);
616 sfree (s_paths);
617 sfree (s);
618 return (-1);
619 }
621 /* If the "separate" option was specified (report_by_device == 2), all
622 * values have already been dispatched from within the loop. */
623 if (!report_by_device)
624 {
625 swap_submit_gauge (NULL, "used", (gauge_t) (total - avail));
626 swap_submit_gauge (NULL, "free", (gauge_t) avail);
627 }
629 sfree (s_paths);
630 sfree (s);
631 return (0);
632 } /* }}} int swap_read */
633 /* #endif HAVE_SWAPCTL && HAVE_SWAPCTL_TWO_ARGS */
635 #elif HAVE_SWAPCTL && HAVE_SWAPCTL_THREE_ARGS
636 static int swap_read (void) /* {{{ */
637 {
638 struct swapent *swap_entries;
639 int swap_num;
640 int status;
641 int i;
643 derive_t used = 0;
644 derive_t total = 0;
646 swap_num = swapctl (SWAP_NSWAP, NULL, 0);
647 if (swap_num < 0)
648 {
649 ERROR ("swap plugin: swapctl (SWAP_NSWAP) failed with status %i.",
650 swap_num);
651 return (-1);
652 }
653 else if (swap_num == 0)
654 return (0);
656 swap_entries = calloc (swap_num, sizeof (*swap_entries));
657 if (swap_entries == NULL)
658 {
659 ERROR ("swap plugin: calloc failed.");
660 return (-1);
661 }
663 status = swapctl (SWAP_STATS, swap_entries, swap_num);
664 if (status != swap_num)
665 {
666 ERROR ("swap plugin: swapctl (SWAP_STATS) failed with status %i.",
667 status);
668 sfree (swap_entries);
669 return (-1);
670 }
672 #if defined(DEV_BSIZE) && (DEV_BSIZE > 0)
673 # define C_SWAP_BLOCK_SIZE ((derive_t) DEV_BSIZE)
674 #else
675 # define C_SWAP_BLOCK_SIZE ((derive_t) 512)
676 #endif
678 for (i = 0; i < swap_num; i++)
679 {
680 if ((swap_entries[i].se_flags & SWF_ENABLE) == 0)
681 continue;
683 used += ((derive_t) swap_entries[i].se_inuse)
684 * C_SWAP_BLOCK_SIZE;
685 total += ((derive_t) swap_entries[i].se_nblks)
686 * C_SWAP_BLOCK_SIZE;
687 }
689 if (total < used)
690 {
691 ERROR ("swap plugin: Total swap space (%"PRIu64") "
692 "is less than used swap space (%"PRIu64").",
693 total, used);
694 return (-1);
695 }
697 swap_submit_gauge (NULL, "used", (gauge_t) used);
698 swap_submit_gauge (NULL, "free", (gauge_t) (total - used));
700 sfree (swap_entries);
702 return (0);
703 } /* }}} int swap_read */
704 /* #endif HAVE_SWAPCTL && HAVE_SWAPCTL_THREE_ARGS */
706 #elif defined(VM_SWAPUSAGE)
707 static int swap_read (void) /* {{{ */
708 {
709 int mib[3];
710 size_t mib_len;
711 struct xsw_usage sw_usage;
712 size_t sw_usage_len;
714 mib_len = 2;
715 mib[0] = CTL_VM;
716 mib[1] = VM_SWAPUSAGE;
718 sw_usage_len = sizeof (struct xsw_usage);
720 if (sysctl (mib, mib_len, &sw_usage, &sw_usage_len, NULL, 0) != 0)
721 return (-1);
723 /* The returned values are bytes. */
724 swap_submit_gauge (NULL, "used", (gauge_t) sw_usage.xsu_used);
725 swap_submit_gauge (NULL, "free", (gauge_t) sw_usage.xsu_avail);
727 return (0);
728 } /* }}} int swap_read */
729 /* #endif VM_SWAPUSAGE */
731 #elif HAVE_LIBKVM_GETSWAPINFO
732 static int swap_read (void) /* {{{ */
733 {
734 struct kvm_swap data_s;
735 int status;
737 derive_t used;
738 derive_t free;
739 derive_t total;
741 if (kvm_obj == NULL)
742 return (-1);
744 /* only one structure => only get the grand total, no details */
745 status = kvm_getswapinfo (kvm_obj, &data_s, 1, 0);
746 if (status == -1)
747 return (-1);
749 total = (derive_t) data_s.ksw_total;
750 used = (derive_t) data_s.ksw_used;
752 total *= (derive_t) kvm_pagesize;
753 used *= (derive_t) kvm_pagesize;
755 free = total - used;
757 swap_submit_gauge (NULL, "used", (gauge_t) used);
758 swap_submit_gauge (NULL, "free", (gauge_t) free);
760 return (0);
761 } /* }}} int swap_read */
762 /* #endif HAVE_LIBKVM_GETSWAPINFO */
764 #elif HAVE_LIBSTATGRAB
765 static int swap_read (void) /* {{{ */
766 {
767 sg_swap_stats *swap;
769 swap = sg_get_swap_stats ();
771 if (swap == NULL)
772 return (-1);
774 swap_submit_gauge (NULL, "used", (gauge_t) swap->used);
775 swap_submit_gauge (NULL, "free", (gauge_t) swap->free);
777 return (0);
778 } /* }}} int swap_read */
779 /* #endif HAVE_LIBSTATGRAB */
781 #elif HAVE_PERFSTAT
782 static int swap_read (void) /* {{{ */
783 {
784 if(perfstat_memory_total(NULL, &pmemory, sizeof(perfstat_memory_total_t), 1) < 0)
785 {
786 char errbuf[1024];
787 WARNING ("memory plugin: perfstat_memory_total failed: %s",
788 sstrerror (errno, errbuf, sizeof (errbuf)));
789 return (-1);
790 }
792 swap_submit_gauge (NULL, "used", (gauge_t) (pmemory.pgsp_total - pmemory.pgsp_free) * pagesize);
793 swap_submit_gauge (NULL, "free", (gauge_t) pmemory.pgsp_free * pagesize );
794 swap_submit_gauge (NULL, "reserved", (gauge_t) pmemory.pgsp_rsvd * pagesize);
795 swap_submit_derive (NULL, "in", (derive_t) pmemory.pgspins * pagesize);
796 swap_submit_derive (NULL, "out", (derive_t) pmemory.pgspouts * pagesize);
798 return (0);
799 } /* }}} int swap_read */
800 #endif /* HAVE_PERFSTAT */
802 void module_register (void)
803 {
804 plugin_register_config ("swap", swap_config,
805 config_keys, config_keys_num);
806 plugin_register_init ("swap", swap_init);
807 plugin_register_read ("swap", swap_read);
808 } /* void module_register */
810 /* vim: set fdm=marker : */