/**
* collectd - src/swap.c
- * Copyright (C) 2005 Florian octo Forster
+ * Copyright (C) 2005-2009 Florian octo Forster
+ * Copyright (C) 2009 Stefan Völkel
+ * Copyright (C) 2009 Manuel Sanmartin
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
- * Free Software Foundation; either version 2 of the License, or (at your
- * option) any later version.
+ * Free Software Foundation; only version 2 of the License is applicable.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
*
* Authors:
* Florian octo Forster <octo at verplant.org>
+ * Manuel Sanmartin
**/
-#include "swap.h"
-
-#if COLLECT_SWAP
-#define MODULE_NAME "swap"
-
-#ifdef KERNEL_SOLARIS
-#include <sys/swap.h>
-#endif /* KERNEL_SOLARIS */
-
-#include "plugin.h"
+#if HAVE_CONFIG_H
+# include "config.h"
+# undef HAVE_CONFIG_H
+#endif
+/* avoid swap.h error "Cannot use swapctl in the large files compilation environment" */
+#if HAVE_SYS_SWAP_H && !defined(_LP64) && _FILE_OFFSET_BITS == 64
+# undef _FILE_OFFSET_BITS
+# undef _LARGEFILE64_SOURCE
+#endif
+
+#include "collectd.h"
#include "common.h"
+#include "plugin.h"
+
+#if HAVE_SYS_SWAP_H
+# include <sys/swap.h>
+#endif
+#if HAVE_VM_ANON_H
+# include <vm/anon.h>
+#endif
+#if HAVE_SYS_PARAM_H
+# include <sys/param.h>
+#endif
+#if HAVE_SYS_SYSCTL_H
+# include <sys/sysctl.h>
+#endif
+#if HAVE_SYS_DKSTAT_H
+# include <sys/dkstat.h>
+#endif
+#if HAVE_KVM_H
+# include <kvm.h>
+#endif
+
+#if HAVE_STATGRAB_H
+# include <statgrab.h>
+#endif
+
+#if HAVE_PERFSTAT
+# include <sys/protosw.h>
+# include <libperfstat.h>
+#endif
#undef MAX
#define MAX(x,y) ((x) > (y) ? (x) : (y))
-static char *swap_file = "swap.rrd";
+#if KERNEL_LINUX
+/* No global variables */
+/* #endif KERNEL_LINUX */
-/* 1099511627776 == 1TB ought to be enough for anyone ;) */
-static char *ds_def[] =
-{
- "DS:used:GAUGE:25:0:1099511627776",
- "DS:free:GAUGE:25:0:1099511627776",
- "DS:cached:GAUGE:25:0:1099511627776",
- "DS:resv:GAUGE:25:0:1099511627776",
- NULL
-};
-static int ds_num = 4;
-
-#ifdef KERNEL_SOLARIS
-static int pagesize;
+#elif HAVE_LIBKSTAT
+static derive_t pagesize;
static kstat_t *ksp;
-#endif /* KERNEL_SOLARIS */
+/* #endif HAVE_LIBKSTAT */
+
+#elif HAVE_SWAPCTL
+/* No global variables */
+/* #endif HAVE_SWAPCTL */
+
+#elif defined(VM_SWAPUSAGE)
+/* No global variables */
+/* #endif defined(VM_SWAPUSAGE) */
+
+#elif HAVE_LIBKVM_GETSWAPINFO
+static kvm_t *kvm_obj = NULL;
+int kvm_pagesize;
+/* #endif HAVE_LIBKVM_GETSWAPINFO */
+
+#elif HAVE_LIBSTATGRAB
+/* No global variables */
+/* #endif HAVE_LIBSTATGRAB */
+
+#elif HAVE_PERFSTAT
+static int pagesize;
+static perfstat_memory_total_t pmemory;
+/*# endif HAVE_PERFSTAT */
+
+#else
+# error "No applicable input method."
+#endif /* HAVE_LIBSTATGRAB */
-void module_init (void)
+static int swap_init (void)
{
-#ifdef KERNEL_SOLARIS
+#if KERNEL_LINUX
+ /* No init stuff */
+/* #endif KERNEL_LINUX */
+
+#elif HAVE_LIBKSTAT
/* getpagesize(3C) tells me this does not fail.. */
- pagesize = getpagesize ();
+ pagesize = (derive_t) getpagesize ();
if (get_kstat (&ksp, "unix", 0, "system_pages"))
ksp = NULL;
-#endif /* KERNEL_SOLARIS */
+/* #endif HAVE_LIBKSTAT */
- return;
-}
+#elif HAVE_SWAPCTL
+ /* No init stuff */
+/* #endif HAVE_SWAPCTL */
-void module_write (char *host, char *inst, char *val)
-{
- rrd_update_file (host, swap_file, val, ds_def, ds_num);
+#elif defined(VM_SWAPUSAGE)
+ /* No init stuff */
+/* #endif defined(VM_SWAPUSAGE) */
+
+#elif HAVE_LIBKVM_GETSWAPINFO
+ if (kvm_obj != NULL)
+ {
+ kvm_close (kvm_obj);
+ kvm_obj = NULL;
+ }
+
+ kvm_pagesize = getpagesize ();
+
+ if ((kvm_obj = kvm_open (NULL, /* execfile */
+ NULL, /* corefile */
+ NULL, /* swapfile */
+ O_RDONLY, /* flags */
+ NULL)) /* errstr */
+ == NULL)
+ {
+ ERROR ("swap plugin: kvm_open failed.");
+ return (-1);
+ }
+/* #endif HAVE_LIBKVM_GETSWAPINFO */
+
+#elif HAVE_LIBSTATGRAB
+ /* No init stuff */
+/* #endif HAVE_LIBSTATGRAB */
+
+#elif HAVE_PERFSTAT
+ pagesize = getpagesize();
+#endif /* HAVE_PERFSTAT */
+
+ return (0);
}
-void module_submit (unsigned long long swap_used,
- unsigned long long swap_free,
- unsigned long long swap_cached,
- unsigned long long swap_resv)
+static void swap_submit (const char *type_instance, derive_t value, unsigned type)
{
- char buffer[512];
+ value_t values[1];
+ value_list_t vl = VALUE_LIST_INIT;
- if (snprintf (buffer, 512, "N:%llu:%llu:%llu:%llu", swap_used,
- swap_free, swap_cached, swap_resv) >= 512)
- return;
+ switch (type)
+ {
+ case DS_TYPE_GAUGE:
+ values[0].gauge = (gauge_t) value;
+ sstrncpy (vl.type, "swap", sizeof (vl.type));
+ break;
+ case DS_TYPE_DERIVE:
+ values[0].derive = value;
+ sstrncpy (vl.type, "swap_io", sizeof (vl.type));
+ break;
+ default:
+ ERROR ("swap plugin: swap_submit called with wrong"
+ " type");
+ }
- plugin_submit (MODULE_NAME, "-", buffer);
-}
+ vl.values = values;
+ vl.values_len = 1;
+ sstrncpy (vl.host, hostname_g, sizeof (vl.host));
+ sstrncpy (vl.plugin, "swap", sizeof (vl.plugin));
+ sstrncpy (vl.type_instance, type_instance, sizeof (vl.type_instance));
+
+ plugin_dispatch_values (&vl);
+} /* void swap_submit */
-void module_read (void)
+static int swap_read (void)
{
-#ifdef KERNEL_LINUX
+#if KERNEL_LINUX
FILE *fh;
char buffer[1024];
-
+
char *fields[8];
int numfields;
- unsigned long long swap_used = 0LL;
- unsigned long long swap_cached = 0LL;
- unsigned long long swap_free = 0LL;
- unsigned long long swap_total = 0LL;
+ derive_t swap_used = 0;
+ derive_t swap_cached = 0;
+ derive_t swap_free = 0;
+ derive_t swap_total = 0;
+ derive_t swap_in = 0;
+ derive_t swap_out = 0;
if ((fh = fopen ("/proc/meminfo", "r")) == NULL)
{
- syslog (LOG_WARNING, "memory: fopen: %s", strerror (errno));
- return;
+ char errbuf[1024];
+ WARNING ("memory: fopen: %s",
+ sstrerror (errno, errbuf, sizeof (errbuf)));
+ return (-1);
}
while (fgets (buffer, 1024, fh) != NULL)
{
- unsigned long long *val = NULL;
+ derive_t *val = NULL;
if (strncasecmp (buffer, "SwapTotal:", 10) == 0)
val = &swap_total;
if (numfields < 2)
continue;
- *val = atoll (fields[1]) * 1024LL;
+ *val = (derive_t) atoll (fields[1]) * 1024LL;
}
if (fclose (fh))
- syslog (LOG_WARNING, "memory: fclose: %s", strerror (errno));
+ {
+ char errbuf[1024];
+ WARNING ("memory: fclose: %s",
+ sstrerror (errno, errbuf, sizeof (errbuf)));
+ }
if ((swap_total == 0LL) || ((swap_free + swap_cached) > swap_total))
- return;
+ return (-1);
swap_used = swap_total - (swap_free + swap_cached);
- module_submit (swap_used, swap_free, swap_cached, -1LL);
-/* #endif defined(KERNEL_LINUX) */
+ if ((fh = fopen ("/proc/vmstat", "r")) == NULL)
+ {
+ char errbuf[1024];
+ WARNING ("swap: fopen: %s",
+ sstrerror (errno, errbuf, sizeof (errbuf)));
+ return (-1);
+ }
+
+ while (fgets (buffer, 1024, fh) != NULL)
+ {
+ derive_t *val = NULL;
-#elif defined(KERNEL_SOLARIS)
- unsigned long long swap_alloc;
- unsigned long long swap_resv;
- unsigned long long swap_avail;
- /* unsigned long long swap_free; */
+ if (strncasecmp (buffer, "pswpin", 6) == 0)
+ val = &swap_in;
+ else if (strncasecmp (buffer, "pswpout", 7) == 0)
+ val = &swap_out;
+ else
+ continue;
- long long availrmem;
- long long swapfs_minfree;
+ numfields = strsplit (buffer, fields, 8);
- struct anoninfo ai;
+ if (numfields < 2)
+ continue;
- if (swapctl (SC_AINFO, &ai) == -1)
- return;
+ *val = (derive_t) atoll (fields[1]);
+ }
+
+ if (fclose (fh))
+ {
+ char errbuf[1024];
+ WARNING ("swap: fclose: %s",
+ sstrerror (errno, errbuf, sizeof (errbuf)));
+ }
+
+ swap_submit ("used", swap_used, DS_TYPE_GAUGE);
+ swap_submit ("free", swap_free, DS_TYPE_GAUGE);
+ swap_submit ("cached", swap_cached, DS_TYPE_GAUGE);
+ swap_submit ("in", swap_in, DS_TYPE_DERIVE);
+ swap_submit ("out", swap_out, DS_TYPE_DERIVE);
- availrmem = get_kstat_value (ksp, "availrmem");
- swapfs_minfree = get_kstat_value (ksp, "minfree");
+/* #endif KERNEL_LINUX */
- if ((availrmem < 0LL) || (swapfs_minfree < 0LL))
- return;
+#elif HAVE_LIBKSTAT
+ derive_t swap_alloc;
+ derive_t swap_resv;
+ derive_t swap_avail;
+
+ struct anoninfo ai;
- /*
- * Calculations learned by reading
- * http://www.itworld.com/Comp/2377/UIR980701perf/
+ if (swapctl (SC_AINFO, &ai) == -1)
+ {
+ char errbuf[1024];
+ ERROR ("swap plugin: swapctl failed: %s",
+ sstrerror (errno, errbuf, sizeof (errbuf)));
+ return (-1);
+ }
+
+ /*
+ * Calculations from:
+ * http://cvs.opensolaris.org/source/xref/on/usr/src/cmd/swap/swap.c
+ * Also see:
+ * http://www.itworld.com/Comp/2377/UIR980701perf/ (outdated?)
+ * /usr/include/vm/anon.h
+ *
+ * In short, swap -s shows: allocated + reserved = used, available
+ *
+ * However, Solaris does not allow to allocated/reserved more than the
+ * available swap (physical memory + disk swap), so the pedant may
+ * prefer: allocated + unallocated = reserved, available
+ *
+ * We map the above to: used + resv = n/a, free
+ *
+ * Does your brain hurt yet? - Christophe Kalt
+ *
+ * Oh, and in case you wonder,
+ * swap_alloc = pagesize * ( ai.ani_max - ai.ani_free );
+ * can suffer from a 32bit overflow.
+ */
+ swap_alloc = (derive_t) ((ai.ani_max - ai.ani_free) * pagesize);
+ swap_resv = (derive_t) ((ai.ani_resv + ai.ani_free - ai.ani_max)
+ * pagesize);
+ swap_avail = (derive_t) ((ai.ani_max - ai.ani_resv) * pagesize);
+
+ swap_submit ("used", swap_alloc, DS_TYPE_GAUGE);
+ swap_submit ("free", swap_avail, DS_TYPE_GAUGE);
+ swap_submit ("reserved", swap_resv, DS_TYPE_GAUGE);
+/* #endif HAVE_LIBKSTAT */
+
+#elif HAVE_SWAPCTL
+ struct swapent *swap_entries;
+ int swap_num;
+ int status;
+ int i;
+
+ derive_t used = 0;
+ derive_t total = 0;
+
+ /*
+ * XXX: This is the syntax for the *BSD `swapctl', which has the
+ * following prototype:
+ * swapctl (int cmd, void *arg, int misc);
*
- * swap_resv += ani_resv
- * swap_alloc += MAX(ani_resv, ani_max) - ani_free
- * swap_avail += MAX(ani_max - ani_resv, 0) + (availrmem - swapfs_minfree)
- * swap_free += ani_free + (availrmem - swapfs_minfree)
+ * HP-UX and Solaris (and possibly other UNIXes) provide `swapctl',
+ * too, but with the following prototype:
+ * swapctl (int cmd, void *arg);
*
- * To clear up the terminology a bit:
- * resv = reserved (but not neccessarily used)
- * alloc = used (neccessarily reserved)
- * avail = not reserved (neccessarily free)
- * free = not allocates (possibly reserved)
+ * Solaris is usually handled in the KSTAT case above. For other UNIXes
+ * a separate case for the other version of `swapctl' may be necessary.
*/
- swap_resv = pagesize * ai.ani_resv;
- swap_alloc = pagesize * (MAX(ai.ani_resv, ai.ani_max) - ai.ani_free);
- swap_avail = pagesize * (MAX(ai.ani_max - ai.ani_resv, 0) + (availrmem - swapfs_minfree));
- /* swap_free = pagesize * (ai.ani_free + (availrmem - swapfs_minfree)); */
+ swap_num = swapctl (SWAP_NSWAP, NULL, 0);
+ if (swap_num < 0)
+ {
+ ERROR ("swap plugin: swapctl (SWAP_NSWAP) failed with status %i.",
+ swap_num);
+ return (-1);
+ }
+ else if (swap_num == 0)
+ return (0);
+
+ swap_entries = calloc (swap_num, sizeof (*swap_entries));
+ if (swap_entries == NULL)
+ {
+ ERROR ("swap plugin: calloc failed.");
+ return (-1);
+ }
+
+ status = swapctl (SWAP_STATS, swap_entries, swap_num);
+ if (status != swap_num)
+ {
+ ERROR ("swap plugin: swapctl (SWAP_STATS) failed with status %i.",
+ status);
+ sfree (swap_entries);
+ return (-1);
+ }
+
+#if defined(DEV_BSIZE) && (DEV_BSIZE > 0)
+# define C_SWAP_BLOCK_SIZE ((derive_t) DEV_BSIZE)
+#else
+# define C_SWAP_BLOCK_SIZE ((derive_t) 512)
+#endif
+
+ for (i = 0; i < swap_num; i++)
+ {
+ if ((swap_entries[i].se_flags & SWF_ENABLE) == 0)
+ continue;
+
+ used += ((derive_t) swap_entries[i].se_inuse)
+ * C_SWAP_BLOCK_SIZE;
+ total += ((derive_t) swap_entries[i].se_nblks)
+ * C_SWAP_BLOCK_SIZE;
+ }
+
+ if (total < used)
+ {
+ ERROR ("swap plugin: Total swap space (%"PRIu64") "
+ "is less than used swap space (%"PRIu64").",
+ total, used);
+ return (-1);
+ }
+
+ swap_submit ("used", used, DS_TYPE_GAUGE);
+ swap_submit ("free", total - used, DS_TYPE_GAUGE);
+
+ sfree (swap_entries);
+/* #endif HAVE_SWAPCTL */
+
+#elif defined(VM_SWAPUSAGE)
+ int mib[3];
+ size_t mib_len;
+ struct xsw_usage sw_usage;
+ size_t sw_usage_len;
+
+ mib_len = 2;
+ mib[0] = CTL_VM;
+ mib[1] = VM_SWAPUSAGE;
+
+ sw_usage_len = sizeof (struct xsw_usage);
+
+ if (sysctl (mib, mib_len, &sw_usage, &sw_usage_len, NULL, 0) != 0)
+ return (-1);
+
+ /* The returned values are bytes. */
+ swap_submit ("used", (derive_t) sw_usage.xsu_used, DS_TYPE_GAUGE);
+ swap_submit ("free", (derive_t) sw_usage.xsu_avail, DS_TYPE_GAUGE);
+/* #endif VM_SWAPUSAGE */
+
+#elif HAVE_LIBKVM_GETSWAPINFO
+ struct kvm_swap data_s;
+ int status;
+
+ derive_t used;
+ derive_t free;
+ derive_t total;
- module_submit (swap_alloc, swap_avail, -1LL, swap_resv - swap_alloc);
-/* #endif defined(KERNEL_SOLARIS) */
+ if (kvm_obj == NULL)
+ return (-1);
-#elif defined(HAVE_LIBSTATGRAB)
+ /* only one structure => only get the grand total, no details */
+ status = kvm_getswapinfo (kvm_obj, &data_s, 1, 0);
+ if (status == -1)
+ return (-1);
+
+ total = (derive_t) data_s.ksw_total;
+ used = (derive_t) data_s.ksw_used;
+
+ total *= (derive_t) kvm_pagesize;
+ used *= (derive_t) kvm_pagesize;
+
+ free = total - used;
+
+ swap_submit ("used", used, DS_TYPE_GAUGE);
+ swap_submit ("free", free, DS_TYPE_GAUGE);
+/* #endif HAVE_LIBKVM_GETSWAPINFO */
+
+#elif HAVE_LIBSTATGRAB
sg_swap_stats *swap;
- if ((swap = sg_get_swap_stats ()) != NULL)
- module_submit (swap->used, swap->free, -1LL, -1LL);
-#endif /* HAVE_LIBSTATGRAB */
-}
+ swap = sg_get_swap_stats ();
+
+ if (swap == NULL)
+ return (-1);
+
+ swap_submit ("used", (derive_t) swap->used, DS_TYPE_GAUGE);
+ swap_submit ("free", (derive_t) swap->free, DS_TYPE_GAUGE);
+/* #endif HAVE_LIBSTATGRAB */
+
+#elif HAVE_PERFSTAT
+ if(perfstat_memory_total(NULL, &pmemory, sizeof(perfstat_memory_total_t), 1) < 0)
+ {
+ char errbuf[1024];
+ WARNING ("memory plugin: perfstat_memory_total failed: %s",
+ sstrerror (errno, errbuf, sizeof (errbuf)));
+ return (-1);
+ }
+ swap_submit ("used", (derive_t) (pmemory.pgsp_total - pmemory.pgsp_free) * pagesize, DS_TYPE_GAUGE);
+ swap_submit ("free", (derive_t) pmemory.pgsp_free * pagesize , DS_TYPE_GAUGE);
+#endif /* HAVE_PERFSTAT */
+
+ return (0);
+} /* int swap_read */
void module_register (void)
{
- plugin_register (MODULE_NAME, module_init, module_read, module_write);
-}
-
-#undef MODULE_NAME
-#endif /* COLLECT_SWAP */
+ plugin_register_init ("swap", swap_init);
+ plugin_register_read ("swap", swap_read);
+} /* void module_register */
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