2 * collectd - src/xencpu.c
3 * Copyright (C) 2016 Pavel Rochnyak
5 * This program is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License as published by the
7 * Free Software Foundation; only version 2 of the License is applicable.
9 * This program is distributed in the hope that it will be useful, but
10 * WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * General Public License for more details.
14 * You should have received a copy of the GNU General Public License along
15 * with this program; if not, write to the Free Software Foundation, Inc.,
16 * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
19 * Pavel Rochnyak <pavel2000 ngs.ru>
28 #ifdef XENCTRL_HAS_XC_INTERFACE
31 #define XC_INTERFACE_INIT_ARGS NULL,NULL,0
32 xc_interface *xc_handle;
34 #else /* XENCTRL_HAS_XC_INTERFACE */
38 #define xc_strerror(xc_interface, errcode) strerror(errcode)
39 #define XC_INTERFACE_INIT_ARGS
40 typedef int xc_interface;
41 xc_interface xc_handle = 0;
43 #endif /* XENCTRL_HAS_XC_INTERFACE */
45 uint32_t num_cpus = 0;
46 xc_cpuinfo_t *cpu_info;
47 static value_to_rate_state_t *cpu_states;
49 static int xencpu_init (void)
51 xc_handle = xc_interface_open(XC_INTERFACE_INIT_ARGS);
54 ERROR ("xencpu: xc_interface_open() failed");
58 xc_physinfo_t *physinfo;
60 physinfo = calloc(1, sizeof(xc_physinfo_t));
63 ERROR ("xencpu plugin: calloc() for physinfo failed.");
64 xc_interface_close(xc_handle);
68 if (xc_physinfo(xc_handle, physinfo) < 0)
70 ERROR ("xencpu plugin: xc_physinfo() failed");
71 xc_interface_close(xc_handle);
76 num_cpus = physinfo->nr_cpus;
79 INFO ("xencpu plugin: Found %"PRIu32" processors.", num_cpus);
81 cpu_info = calloc(num_cpus, sizeof(xc_cpuinfo_t));
84 ERROR ("xencpu plugin: calloc() for num_cpus failed.");
85 xc_interface_close(xc_handle);
89 cpu_states = calloc (num_cpus, sizeof (value_to_rate_state_t));
90 if (cpu_states == NULL)
92 ERROR ("xencpu plugin: calloc() for cpu_states failed.");
93 xc_interface_close(xc_handle);
99 } /* static int xencpu_init */
101 static int xencpu_shutdown (void)
105 xc_interface_close(xc_handle);
108 } /* static int xencpu_shutdown */
110 static void submit_value (int cpu_num, gauge_t percent)
113 value_list_t vl = VALUE_LIST_INIT;
115 values[0].gauge = percent;
120 sstrncpy (vl.host, hostname_g, sizeof (vl.host));
121 sstrncpy (vl.plugin, "xencpu", sizeof (vl.plugin));
122 sstrncpy (vl.type, "percent", sizeof (vl.type));
123 sstrncpy (vl.type_instance, "load", sizeof (vl.type_instance));
126 ssnprintf (vl.plugin_instance, sizeof (vl.plugin_instance),
129 plugin_dispatch_values (&vl);
130 } /* static void submit_value */
132 static int xencpu_read (void)
134 cdtime_t now = cdtime ();
138 rc = xc_getcpuinfo(xc_handle, num_cpus, cpu_info, &nr_cpus);
140 ERROR ("xencpu: xc_getcpuinfo() Failed: %d %s\n", rc, xc_strerror(xc_handle,errno));
145 for (cpu = 0; cpu < nr_cpus; cpu++) {
147 value_t value = {.derive = cpu_info[cpu].idletime};
149 status = value_to_rate (&rate, value, DS_TYPE_DERIVE, now, &cpu_states[cpu]);
151 submit_value(cpu, 100 - rate/10000000);
156 } /* static int xencpu_read */
158 void module_register (void)
160 plugin_register_init ("xencpu", xencpu_init);
161 plugin_register_read ("xencpu", xencpu_read);
162 plugin_register_shutdown ("xencpu", xencpu_shutdown);
163 } /* void module_register */