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 if (kvm_obj != NULL)
164 {
165 kvm_close (kvm_obj);
166 kvm_obj = NULL;
167 }
169 kvm_pagesize = getpagesize ();
171 if ((kvm_obj = kvm_open (NULL, /* execfile */
172 NULL, /* corefile */
173 NULL, /* swapfile */
174 O_RDONLY, /* flags */
175 NULL)) /* errstr */
176 == NULL)
177 {
178 ERROR ("swap plugin: kvm_open failed.");
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 (const char *plugin_instance, /* {{{ */
195 const char *type, const char *type_instance,
196 value_t value)
197 {
198 value_list_t vl = VALUE_LIST_INIT;
200 assert (type != NULL);
202 vl.values = &value;
203 vl.values_len = 1;
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, sizeof (vl.plugin_instance));
208 sstrncpy (vl.type, type, sizeof (vl.type));
209 if (type_instance != NULL)
210 sstrncpy (vl.type_instance, type_instance, sizeof (vl.type_instance));
212 plugin_dispatch_values (&vl);
213 } /* }}} void swap_submit_inst */
215 static void swap_submit_gauge (const char *plugin_instance, /* {{{ */
216 const char *type_instance, gauge_t value)
217 {
218 value_t v;
220 v.gauge = value;
221 swap_submit (plugin_instance, "swap", type_instance, v);
222 } /* }}} void swap_submit_gauge */
224 #if KERNEL_LINUX
225 static void swap_submit_derive (const char *plugin_instance, /* {{{ */
226 const char *type_instance, derive_t value)
227 {
228 value_t v;
230 v.derive = value;
231 swap_submit (plugin_instance, "swap_io", type_instance, v);
232 } /* }}} void swap_submit_derive */
234 static int swap_read_separate (void) /* {{{ */
235 {
236 FILE *fh;
237 char buffer[1024];
239 fh = fopen ("/proc/swaps", "r");
240 if (fh == NULL)
241 {
242 char errbuf[1024];
243 WARNING ("swap plugin: fopen (/proc/swaps) failed: %s",
244 sstrerror (errno, errbuf, sizeof (errbuf)));
245 return (-1);
246 }
248 while (fgets (buffer, sizeof (buffer), fh) != NULL)
249 {
250 char *fields[8];
251 int numfields;
252 char *endptr;
254 char path[PATH_MAX];
255 gauge_t size;
256 gauge_t used;
257 gauge_t free;
259 numfields = strsplit (buffer, fields, STATIC_ARRAY_SIZE (fields));
260 if (numfields != 5)
261 continue;
263 sstrncpy (path, fields[0], sizeof (path));
264 escape_slashes (path, sizeof (path));
266 errno = 0;
267 endptr = NULL;
268 size = strtod (fields[2], &endptr);
269 if ((endptr == fields[2]) || (errno != 0))
270 continue;
272 errno = 0;
273 endptr = NULL;
274 used = strtod (fields[3], &endptr);
275 if ((endptr == fields[3]) || (errno != 0))
276 continue;
278 if (size < used)
279 continue;
281 free = size - used;
283 swap_submit_gauge (path, "used", used);
284 swap_submit_gauge (path, "free", free);
285 }
287 fclose (fh);
289 return (0);
290 } /* }}} int swap_read_separate */
292 static int swap_read_combined (void) /* {{{ */
293 {
294 FILE *fh;
295 char buffer[1024];
297 uint8_t have_data = 0;
298 gauge_t swap_used = 0.0;
299 gauge_t swap_cached = 0.0;
300 gauge_t swap_free = 0.0;
301 gauge_t swap_total = 0.0;
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 {
323 swap_total = strtod (fields[1], /* endptr = */ NULL);
324 have_data |= 0x01;
325 }
326 else if (strcasecmp (fields[0], "SwapFree:") == 0)
327 {
328 swap_free = strtod (fields[1], /* endptr = */ NULL);
329 have_data |= 0x02;
330 }
331 else if (strcasecmp (fields[0], "SwapCached:") == 0)
332 {
333 swap_cached = strtod (fields[1], /* endptr = */ NULL);
334 have_data |= 0x04;
335 }
336 }
338 fclose (fh);
340 if (have_data != 0x07)
341 return (ENOENT);
343 if (isnan (swap_total)
344 || (swap_total <= 0.0)
345 || ((swap_free + swap_cached) > swap_total))
346 return (EINVAL);
348 swap_used = swap_total - (swap_free + swap_cached);
350 swap_submit_gauge (NULL, "used", 1024.0 * swap_used);
351 swap_submit_gauge (NULL, "free", 1024.0 * swap_free);
352 swap_submit_gauge (NULL, "cached", 1024.0 * swap_cached);
354 return (0);
355 } /* }}} int swap_read_combined */
357 static int swap_read_io (void) /* {{{ */
358 {
359 FILE *fh;
360 char buffer[1024];
362 _Bool old_kernel = 0;
364 uint8_t have_data = 0;
365 derive_t swap_in = 0;
366 derive_t swap_out = 0;
368 fh = fopen ("/proc/vmstat", "r");
369 if (fh == NULL)
370 {
371 /* /proc/vmstat does not exist in kernels <2.6 */
372 fh = fopen ("/proc/stat", "r");
373 if (fh == NULL)
374 {
375 char errbuf[1024];
376 WARNING ("swap: fopen: %s",
377 sstrerror (errno, errbuf, sizeof (errbuf)));
378 return (-1);
379 }
380 else
381 old_kernel = 1;
382 }
384 while (fgets (buffer, sizeof (buffer), fh) != NULL)
385 {
386 char *fields[8];
387 int numfields;
389 numfields = strsplit (buffer, fields, STATIC_ARRAY_SIZE (fields));
391 if (!old_kernel)
392 {
393 if (numfields != 2)
394 continue;
396 if (strcasecmp ("pswpin", fields[0]) == 0)
397 {
398 strtoderive (fields[1], &swap_in);
399 have_data |= 0x01;
400 }
401 else if (strcasecmp ("pswpout", fields[0]) == 0)
402 {
403 strtoderive (fields[1], &swap_out);
404 have_data |= 0x02;
405 }
406 }
407 else /* if (old_kernel) */
408 {
409 if (numfields != 3)
410 continue;
412 if (strcasecmp ("page", fields[0]) == 0)
413 {
414 strtoderive (fields[1], &swap_in);
415 strtoderive (fields[2], &swap_out);
416 }
417 }
418 } /* while (fgets) */
420 fclose (fh);
422 if (have_data != 0x03)
423 return (ENOENT);
425 if (report_bytes)
426 {
427 swap_in = swap_in * pagesize;
428 swap_out = swap_out * pagesize;
429 }
431 swap_submit_derive (NULL, "in", swap_in);
432 swap_submit_derive (NULL, "out", swap_out);
434 return (0);
435 } /* }}} int swap_read_io */
437 static int swap_read (void) /* {{{ */
438 {
439 if (report_by_device)
440 swap_read_separate ();
441 else
442 swap_read_combined ();
444 swap_read_io ();
446 return (0);
447 } /* }}} int swap_read */
448 /* #endif KERNEL_LINUX */
450 /*
451 * Under Solaris, two mechanisms can be used to read swap statistics, swapctl
452 * and kstat. The former reads physical space used on a device, the latter
453 * reports the view from the virtual memory system. It was decided that the
454 * kstat-based information should be moved to the "vmem" plugin, but nobody
455 * with enough Solaris experience was available at that time to do this. The
456 * code below is still there for your reference but it won't be activated in
457 * *this* plugin again. --octo
458 */
459 #elif 0 && HAVE_LIBKSTAT
460 /* kstat-based read function */
461 static int swap_read_kstat (void) /* {{{ */
462 {
463 derive_t swap_alloc;
464 derive_t swap_resv;
465 derive_t swap_avail;
467 struct anoninfo ai;
469 if (swapctl (SC_AINFO, &ai) == -1)
470 {
471 char errbuf[1024];
472 ERROR ("swap plugin: swapctl failed: %s",
473 sstrerror (errno, errbuf, sizeof (errbuf)));
474 return (-1);
475 }
477 /*
478 * Calculations from:
479 * http://cvs.opensolaris.org/source/xref/on/usr/src/cmd/swap/swap.c
480 * Also see:
481 * http://www.itworld.com/Comp/2377/UIR980701perf/ (outdated?)
482 * /usr/include/vm/anon.h
483 *
484 * In short, swap -s shows: allocated + reserved = used, available
485 *
486 * However, Solaris does not allow to allocated/reserved more than the
487 * available swap (physical memory + disk swap), so the pedant may
488 * prefer: allocated + unallocated = reserved, available
489 *
490 * We map the above to: used + resv = n/a, free
491 *
492 * Does your brain hurt yet? - Christophe Kalt
493 *
494 * Oh, and in case you wonder,
495 * swap_alloc = pagesize * ( ai.ani_max - ai.ani_free );
496 * can suffer from a 32bit overflow.
497 */
498 swap_alloc = (derive_t) ((ai.ani_max - ai.ani_free) * pagesize);
499 swap_resv = (derive_t) ((ai.ani_resv + ai.ani_free - ai.ani_max)
500 * pagesize);
501 swap_avail = (derive_t) ((ai.ani_max - ai.ani_resv) * pagesize);
503 swap_submit_gauge (NULL, "used", swap_alloc);
504 swap_submit_gauge (NULL, "free", swap_avail);
505 swap_submit_gauge (NULL, "reserved", swap_resv);
507 return (0);
508 } /* }}} int swap_read_kstat */
509 /* #endif 0 && HAVE_LIBKSTAT */
511 #elif HAVE_SWAPCTL && HAVE_SWAPCTL_TWO_ARGS
512 /* swapctl-based read function */
513 static int swap_read (void) /* {{{ */
514 {
515 swaptbl_t *s;
516 char *s_paths;
517 int swap_num;
518 int status;
519 int i;
521 derive_t avail = 0;
522 derive_t total = 0;
524 swap_num = swapctl (SC_GETNSWP, NULL);
525 if (swap_num < 0)
526 {
527 ERROR ("swap plugin: swapctl (SC_GETNSWP) failed with status %i.",
528 swap_num);
529 return (-1);
530 }
531 else if (swap_num == 0)
532 return (0);
534 /* Allocate and initialize the swaptbl_t structure */
535 s = (swaptbl_t *) smalloc (swap_num * sizeof (swapent_t) + sizeof (struct swaptable));
536 if (s == NULL)
537 {
538 ERROR ("swap plugin: smalloc failed.");
539 return (-1);
540 }
542 /* Memory to store the path names. We only use these paths when the
543 * separate option has been configured, but it's easier to just
544 * allocate enough memory in any case. */
545 s_paths = calloc (swap_num, PATH_MAX);
546 if (s_paths == NULL)
547 {
548 ERROR ("swap plugin: malloc failed.");
549 sfree (s);
550 return (-1);
551 }
552 for (i = 0; i < swap_num; i++)
553 s->swt_ent[i].ste_path = s_paths + (i * PATH_MAX);
554 s->swt_n = swap_num;
556 status = swapctl (SC_LIST, s);
557 if (status < 0)
558 {
559 char errbuf[1024];
560 ERROR ("swap plugin: swapctl (SC_LIST) failed: %s",
561 sstrerror (errno, errbuf, sizeof (errbuf)));
562 sfree (s_paths);
563 sfree (s);
564 return (-1);
565 }
566 else if (swap_num < status)
567 {
568 /* more elements returned than requested */
569 ERROR ("swap plugin: I allocated memory for %i structure%s, "
570 "but swapctl(2) claims to have returned %i. "
571 "I'm confused and will give up.",
572 swap_num, (swap_num == 1) ? "" : "s",
573 status);
574 sfree (s_paths);
575 sfree (s);
576 return (-1);
577 }
578 else if (swap_num > status)
579 /* less elements returned than requested */
580 swap_num = status;
582 for (i = 0; i < swap_num; i++)
583 {
584 char path[PATH_MAX];
585 derive_t this_total;
586 derive_t this_avail;
588 if ((s->swt_ent[i].ste_flags & ST_INDEL) != 0)
589 continue;
591 this_total = ((derive_t) s->swt_ent[i].ste_pages) * pagesize;
592 this_avail = ((derive_t) s->swt_ent[i].ste_free) * pagesize;
594 /* Shortcut for the "combined" setting (default) */
595 if (!report_by_device)
596 {
597 avail += this_avail;
598 total += this_total;
599 continue;
600 }
602 sstrncpy (path, s->swt_ent[i].ste_path, sizeof (path));
603 escape_slashes (path, sizeof (path));
605 swap_submit_gauge (path, "used", (gauge_t) (this_total - this_avail));
606 swap_submit_gauge (path, "free", (gauge_t) this_avail);
607 } /* for (swap_num) */
609 if (total < avail)
610 {
611 ERROR ("swap plugin: Total swap space (%"PRIi64") "
612 "is less than free swap space (%"PRIi64").",
613 total, avail);
614 sfree (s_paths);
615 sfree (s);
616 return (-1);
617 }
619 /* If the "separate" option was specified (report_by_device == 2), all
620 * values have already been dispatched from within the loop. */
621 if (!report_by_device)
622 {
623 swap_submit_gauge (NULL, "used", (gauge_t) (total - avail));
624 swap_submit_gauge (NULL, "free", (gauge_t) avail);
625 }
627 sfree (s_paths);
628 sfree (s);
629 return (0);
630 } /* }}} int swap_read */
631 /* #endif HAVE_SWAPCTL && HAVE_SWAPCTL_TWO_ARGS */
633 #elif HAVE_SWAPCTL && HAVE_SWAPCTL_THREE_ARGS
634 static int swap_read (void) /* {{{ */
635 {
636 struct swapent *swap_entries;
637 int swap_num;
638 int status;
639 int i;
641 derive_t used = 0;
642 derive_t total = 0;
644 swap_num = swapctl (SWAP_NSWAP, NULL, 0);
645 if (swap_num < 0)
646 {
647 ERROR ("swap plugin: swapctl (SWAP_NSWAP) failed with status %i.",
648 swap_num);
649 return (-1);
650 }
651 else if (swap_num == 0)
652 return (0);
654 swap_entries = calloc (swap_num, sizeof (*swap_entries));
655 if (swap_entries == NULL)
656 {
657 ERROR ("swap plugin: calloc failed.");
658 return (-1);
659 }
661 status = swapctl (SWAP_STATS, swap_entries, swap_num);
662 if (status != swap_num)
663 {
664 ERROR ("swap plugin: swapctl (SWAP_STATS) failed with status %i.",
665 status);
666 sfree (swap_entries);
667 return (-1);
668 }
670 #if defined(DEV_BSIZE) && (DEV_BSIZE > 0)
671 # define C_SWAP_BLOCK_SIZE ((derive_t) DEV_BSIZE)
672 #else
673 # define C_SWAP_BLOCK_SIZE ((derive_t) 512)
674 #endif
676 for (i = 0; i < swap_num; i++)
677 {
678 if ((swap_entries[i].se_flags & SWF_ENABLE) == 0)
679 continue;
681 used += ((derive_t) swap_entries[i].se_inuse)
682 * C_SWAP_BLOCK_SIZE;
683 total += ((derive_t) swap_entries[i].se_nblks)
684 * C_SWAP_BLOCK_SIZE;
685 }
687 if (total < used)
688 {
689 ERROR ("swap plugin: Total swap space (%"PRIu64") "
690 "is less than used swap space (%"PRIu64").",
691 total, used);
692 return (-1);
693 }
695 swap_submit_gauge (NULL, "used", (gauge_t) used);
696 swap_submit_gauge (NULL, "free", (gauge_t) (total - used));
698 sfree (swap_entries);
700 return (0);
701 } /* }}} int swap_read */
702 /* #endif HAVE_SWAPCTL && HAVE_SWAPCTL_THREE_ARGS */
704 #elif defined(VM_SWAPUSAGE)
705 static int swap_read (void) /* {{{ */
706 {
707 int mib[3];
708 size_t mib_len;
709 struct xsw_usage sw_usage;
710 size_t sw_usage_len;
712 mib_len = 2;
713 mib[0] = CTL_VM;
714 mib[1] = VM_SWAPUSAGE;
716 sw_usage_len = sizeof (struct xsw_usage);
718 if (sysctl (mib, mib_len, &sw_usage, &sw_usage_len, NULL, 0) != 0)
719 return (-1);
721 /* The returned values are bytes. */
722 swap_submit_gauge (NULL, "used", (gauge_t) sw_usage.xsu_used);
723 swap_submit_gauge (NULL, "free", (gauge_t) sw_usage.xsu_avail);
725 return (0);
726 } /* }}} int swap_read */
727 /* #endif VM_SWAPUSAGE */
729 #elif HAVE_LIBKVM_GETSWAPINFO
730 static int swap_read (void) /* {{{ */
731 {
732 struct kvm_swap data_s;
733 int status;
735 derive_t used;
736 derive_t free;
737 derive_t total;
739 if (kvm_obj == NULL)
740 return (-1);
742 /* only one structure => only get the grand total, no details */
743 status = kvm_getswapinfo (kvm_obj, &data_s, 1, 0);
744 if (status == -1)
745 return (-1);
747 total = (derive_t) data_s.ksw_total;
748 used = (derive_t) data_s.ksw_used;
750 total *= (derive_t) kvm_pagesize;
751 used *= (derive_t) kvm_pagesize;
753 free = total - used;
755 swap_submit_gauge (NULL, "used", (gauge_t) used);
756 swap_submit_gauge (NULL, "free", (gauge_t) free);
758 return (0);
759 } /* }}} int swap_read */
760 /* #endif HAVE_LIBKVM_GETSWAPINFO */
762 #elif HAVE_LIBSTATGRAB
763 static int swap_read (void) /* {{{ */
764 {
765 sg_swap_stats *swap;
767 swap = sg_get_swap_stats ();
769 if (swap == NULL)
770 return (-1);
772 swap_submit_gauge (NULL, "used", (gauge_t) swap->used);
773 swap_submit_gauge (NULL, "free", (gauge_t) swap->free);
775 return (0);
776 } /* }}} int swap_read */
777 /* #endif HAVE_LIBSTATGRAB */
779 #elif HAVE_PERFSTAT
780 static int swap_read (void) /* {{{ */
781 {
782 if(perfstat_memory_total(NULL, &pmemory, sizeof(perfstat_memory_total_t), 1) < 0)
783 {
784 char errbuf[1024];
785 WARNING ("memory plugin: perfstat_memory_total failed: %s",
786 sstrerror (errno, errbuf, sizeof (errbuf)));
787 return (-1);
788 }
789 swap_submit_gauge (NULL, "used", (gauge_t) (pmemory.pgsp_total - pmemory.pgsp_free) * pagesize);
790 swap_submit_gauge (NULL, "free", (gauge_t) pmemory.pgsp_free * pagesize );
792 return (0);
793 } /* }}} int swap_read */
794 #endif /* HAVE_PERFSTAT */
796 void module_register (void)
797 {
798 plugin_register_config ("swap", swap_config,
799 config_keys, config_keys_num);
800 plugin_register_init ("swap", swap_init);
801 plugin_register_read ("swap", swap_read);
802 } /* void module_register */
804 /* vim: set fdm=marker : */