+#if defined(HOST_VM_INFO)
+ kern_return_t status;
+ vm_statistics_data_t vm_data;
+ mach_msg_type_number_t vm_data_len;
+
+ long long wired;
+ long long active;
+ long long inactive;
+ long long free;
+
+ if (!port_host || !pagesize)
+ return;
+
+ vm_data_len = sizeof (vm_data) / sizeof (natural_t);
+ if ((status = host_statistics (port_host, HOST_VM_INFO,
+ (host_info_t) &vm_data,
+ &vm_data_len)) != KERN_SUCCESS)
+ {
+ syslog (LOG_ERR, "memory-plugin: host_statistics failed and returned the value %i", (int) status);
+ return;
+ }
+
+ /*
+ * From <http://docs.info.apple.com/article.html?artnum=107918>:
+ *
+ * Wired memory
+ * This information can't be cached to disk, so it must stay in RAM.
+ * The amount depends on what applications you are using.
+ *
+ * Active memory
+ * This information is currently in RAM and actively being used.
+ *
+ * Inactive memory
+ * This information is no longer being used and has been cached to
+ * disk, but it will remain in RAM until another application needs
+ * the space. Leaving this information in RAM is to your advantage if
+ * you (or a client of your computer) come back to it later.
+ *
+ * Free memory
+ * This memory is not being used.
+ */
+
+ wired = vm_data.wire_count * pagesize;
+ active = vm_data.active_count * pagesize;
+ inactive = vm_data.inactive_count * pagesize;
+ free = vm_data.free_count * pagesize;
+
+ memory_submit (wired + active, -1, inactive, free);
+/* #endif HOST_VM_INFO */
+
+#elif HAVE_SYSCTLBYNAME
+ /*
+ * vm.stats.vm.v_page_size: 4096
+ * vm.stats.vm.v_page_count: 246178
+ * vm.stats.vm.v_free_count: 28760
+ * vm.stats.vm.v_wire_count: 37526
+ * vm.stats.vm.v_active_count: 55239
+ * vm.stats.vm.v_inactive_count: 113730
+ * vm.stats.vm.v_cache_count: 10809
+ */
+ char *sysctl_keys[8] =
+ {
+ "vm.stats.vm.v_page_size",
+ "vm.stats.vm.v_page_count",
+ "vm.stats.vm.v_free_count",
+ "vm.stats.vm.v_wire_count",
+ "vm.stats.vm.v_active_count",
+ "vm.stats.vm.v_inactive_count",
+ "vm.stats.vm.v_cache_count",
+ NULL
+ };
+ int sysctl_vals[8] = { -1, -1, -1, -1, -1, -1, -1, -1 };
+
+ size_t len;
+ int i;
+ int status;
+
+ for (i = 0; sysctl_keys[i] != NULL; i++)
+ {
+ len = sizeof (int);
+ if ((status = sysctlbyname (sysctl_keys[i],
+ (void *) &sysctl_vals[i], &len,
+ NULL, 0)) < 0)
+ {
+ syslog (LOG_ERR, "memory plugin: sysctlbyname (%s): %s",
+ sysctl_keys[i], strerror (errno));
+ return;
+ }
+ DBG ("%26s: %6i", sysctl_keys[i], sysctl_vals[i]);
+ } /* for i */
+
+ /* multiply all all page counts with the pagesize */
+ for (i = 1; sysctl_keys[i] != NULL; i++)
+ sysctl_vals[i] = sysctl_vals[i] * sysctl_vals[0];
+
+ memory_submit (sysctl_vals[3] + sysctl_vals[4], /* wired + active */
+ sysctl_vals[6], /* cache */
+ sysctl_vals[5], /* inactive */
+ sysctl_vals[2]); /* free */
+/* #endif HAVE_SYSCTLBYNAME */
+
+#elif defined(KERNEL_LINUX)