2 * collectd - src/cpusleep.c
3 * Copyright (C) 2016 rinigus
5 * The MIT License (MIT)
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8 * of this software and associated documentation files (the "Software"), to deal
9 * in the Software without restriction, including without limitation the rights
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11 * copies of the Software, and to permit persons to whom the Software is
12 * furnished to do so, subject to the following conditions:
14 * The above copyright notice and this permission notice shall be included in
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26 * rinigus <http://github.com/rinigus>
28 * CPU sleep is reported in milliseconds of sleep per second of wall
29 * time. For that, the time difference between BOOT and MONOTONIC clocks
30 * is reported using derive type.
39 static void cpusleep_submit(derive_t cpu_sleep) {
40 value_list_t vl = VALUE_LIST_INIT;
42 vl.values = &(value_t) { .derive = cpu_sleep };
44 sstrncpy(vl.host, hostname_g, sizeof(vl.host));
45 sstrncpy(vl.plugin, "cpusleep", sizeof(vl.plugin));
46 sstrncpy(vl.type, "total_time_in_ms", sizeof(vl.type));
48 plugin_dispatch_values(&vl);
51 static int cpusleep_read(void) {
53 if (clock_gettime(CLOCK_BOOTTIME, &b) < 0) {
54 ERROR("cpusleep plugin: clock_boottime failed");
58 if (clock_gettime(CLOCK_MONOTONIC, &m) < 0) {
59 ERROR("cpusleep plugin: clock_monotonic failed");
63 // to avoid false positives in counter overflow due to reboot,
64 // derive is used. Sleep is calculated in milliseconds
65 derive_t diffsec = b.tv_sec - m.tv_sec;
66 derive_t diffnsec = b.tv_nsec - m.tv_nsec;
67 derive_t sleep = diffsec * 1000 + diffnsec / 1000000;
69 cpusleep_submit(sleep);
74 void module_register(void) {
75 plugin_register_read("cpusleep", cpusleep_read);
76 } /* void module_register */