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GCC Code Coverage Report

Directory:	./		Exec	Total	Coverage
File:	usr.sbin/snmpd/timer.c	Lines:	0	43	0.0 %
Date:	2017-11-07	Branches:	0	24	0.0 %


/*	$OpenBSD: timer.c,v 1.7 2016/10/28 08:01:53 rzalamena Exp $	*/

/*
 * Copyright (c) 2008 Reyk Floeter <reyk@openbsd.org>
 *
 * Permission to use, copy, modify, and distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */

#include <sys/queue.h>
#include <sys/types.h>
#include <sys/time.h>
#include <sys/sched.h>
#include <sys/socket.h>
#include <sys/sysctl.h>

#include <net/if.h>
#include <net/if_types.h>
#include <netinet/in.h>
#include <netinet/ip.h>
#include <netinet/ip_var.h>
#include <arpa/inet.h>

#include <stdlib.h>
#include <stdio.h>
#include <errno.h>
#include <event.h>
#include <fcntl.h>
#include <string.h>
#include <unistd.h>
#include <pwd.h>

#include "snmpd.h"
#include "mib.h"

void	 timer_cpu(int, short, void *);
int	 percentages(int, int64_t *, int64_t *, int64_t *, int64_t *);

static int64_t	**cp_time;
static int64_t	**cp_old;
static int64_t	**cp_diff;
struct event	  cpu_ev;

void
timer_cpu(int fd, short event, void *arg)
{
	struct event	*ev = (struct event *)arg;
	struct timeval	 tv = { 60, 0 };	/* every 60 seconds */
	int		 mib[3] = { CTL_KERN, KERN_CPTIME2, 0 }, n;
	size_t		 len;
	int64_t		*cptime2;

	len = CPUSTATES * sizeof(int64_t);
	for (n = 0; n < snmpd_env->sc_ncpu; n++) {
		mib[2] = n;
		cptime2 = snmpd_env->sc_cpustates + (CPUSTATES * n);
		if (sysctl(mib, 3, cp_time[n], &len, NULL, 0) == -1)
			continue;
		(void)percentages(CPUSTATES, cptime2, cp_time[n],
		    cp_old[n], cp_diff[n]);
#ifdef DEBUG
		log_debug("timer_cpu: cpu%d %lld%% idle in %llds", n,
		    (cptime2[CP_IDLE] > 1000 ?
		    1000 : (cptime2[CP_IDLE] / 10)), (long long) tv.tv_sec);
#endif
	}

	evtimer_add(ev, &tv);
}

void
timer_init(void)
{
	int	 mib[] = { CTL_HW, HW_NCPU }, i;
	size_t	 len;

	len = sizeof(snmpd_env->sc_ncpu);
	if (sysctl(mib, 2, &snmpd_env->sc_ncpu, &len, NULL, 0) == -1)
		fatal("sysctl");

	snmpd_env->sc_cpustates = calloc(snmpd_env->sc_ncpu,
	    CPUSTATES * sizeof(int64_t));
	cp_time = calloc(snmpd_env->sc_ncpu, sizeof(int64_t *));
	cp_old = calloc(snmpd_env->sc_ncpu, sizeof(int64_t *));
	cp_diff = calloc(snmpd_env->sc_ncpu, sizeof(int64_t *));
	if (snmpd_env->sc_cpustates == NULL ||
	    cp_time == NULL || cp_old == NULL || cp_diff == NULL)
		fatal("calloc");
	for (i = 0; i < snmpd_env->sc_ncpu; i++) {
		cp_time[i] = calloc(CPUSTATES, sizeof(int64_t));
		cp_old[i] = calloc(CPUSTATES, sizeof(int64_t));
		cp_diff[i] = calloc(CPUSTATES, sizeof(int64_t));
		if (cp_time[i] == NULL || cp_old[i] == NULL ||
		    cp_diff[i] == NULL)
			fatal("calloc");
	}

	evtimer_set(&cpu_ev, timer_cpu, &cpu_ev);
	timer_cpu(0, EV_TIMEOUT, &cpu_ev);
}

/*
 * percentages() function to calculate CPU utilization.
 * Source code derived from the top(1) utility:
 *
 * Copyright (c) 1984, 1989, William LeFebvre, Rice University
 * Copyright (c) 1989, 1990, 1992, William LeFebvre, Northwestern University
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR OR HIS EMPLOYER BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
int
percentages(int cnt, int64_t *out, int64_t *new, int64_t *old, int64_t *diffs)
{
	int64_t change, total_change, *dp, half_total;
	int i;

	/* initialization */
	total_change = 0;
	dp = diffs;

	/* calculate changes for each state and the overall change */
	for (i = 0; i < cnt; i++) {
		if ((change = *new - *old) < 0) {
			/* this only happens when the counter wraps */
			change = (*new - *old);
		}
		total_change += (*dp++ = change);
		*old++ = *new++;
	}

	/* avoid divide by zero potential */
	if (total_change == 0)
		total_change = 1;

	/* calculate percentages based on overall change, rounding up */
	half_total = total_change / 2l;
	for (i = 0; i < cnt; i++)
		*out++ = ((*diffs++ * 1000 + half_total) / total_change);

	/* return the total in case the caller wants to use it */
	return (total_change);
}


Generated by: GCOVR (Version 3.3)

Line	Branch	Exec	Source
1			/* $OpenBSD: timer.c,v 1.7 2016/10/28 08:01:53 rzalamena Exp $ */
2
3			/*
4			* Copyright (c) 2008 Reyk Floeter <reyk@openbsd.org>
5			*
6			* Permission to use, copy, modify, and distribute this software for any
7			* purpose with or without fee is hereby granted, provided that the above
8			* copyright notice and this permission notice appear in all copies.
9			*
10			* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
11			* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
12			* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
13			* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
14			* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
15			* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
16			* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17			*/
18
19			#include <sys/queue.h>
20			#include <sys/types.h>
21			#include <sys/time.h>
22			#include <sys/sched.h>
23			#include <sys/socket.h>
24			#include <sys/sysctl.h>
25
26			#include <net/if.h>
27			#include <net/if_types.h>
28			#include <netinet/in.h>
29			#include <netinet/ip.h>
30			#include <netinet/ip_var.h>
31			#include <arpa/inet.h>
32
33			#include <stdlib.h>
34			#include <stdio.h>
35			#include <errno.h>
36			#include <event.h>
37			#include <fcntl.h>
38			#include <string.h>
39			#include <unistd.h>
40			#include <pwd.h>
41
42			#include "snmpd.h"
43			#include "mib.h"
44
45			void timer_cpu(int, short, void *);
46			int percentages(int, int64_t , int64_t , int64_t , int64_t );
47
48			static int64_t **cp_time;
49			static int64_t **cp_old;
50			static int64_t **cp_diff;
51			struct event cpu_ev;
52
53			void
54			timer_cpu(int fd, short event, void *arg)
55			{
56			struct event ev = (struct event )arg;
57			struct timeval tv = { 60, 0 }; /* every 60 seconds */
58			int mib[3] = { CTL_KERN, KERN_CPTIME2, 0 }, n;
59			size_t len;
60			int64_t *cptime2;
61
62			len = CPUSTATES * sizeof(int64_t);
63			for (n = 0; n < snmpd_env->sc_ncpu; n++) {
64			mib[2] = n;
65			cptime2 = snmpd_env->sc_cpustates + (CPUSTATES * n);
66			if (sysctl(mib, 3, cp_time[n], &len, NULL, 0) == -1)
67			continue;
68			(void)percentages(CPUSTATES, cptime2, cp_time[n],
69			cp_old[n], cp_diff[n]);
70			#ifdef DEBUG
71			log_debug("timer_cpu: cpu%d %lld%% idle in %llds", n,
72			(cptime2[CP_IDLE] > 1000 ?
73			1000 : (cptime2[CP_IDLE] / 10)), (long long) tv.tv_sec);
74			#endif
75			}
76
77			evtimer_add(ev, &tv);
78			}
79
80			void
81			timer_init(void)
82			{
83			int mib[] = { CTL_HW, HW_NCPU }, i;
84			size_t len;
85
86			len = sizeof(snmpd_env->sc_ncpu);
87			if (sysctl(mib, 2, &snmpd_env->sc_ncpu, &len, NULL, 0) == -1)
88			fatal("sysctl");
89
90			snmpd_env->sc_cpustates = calloc(snmpd_env->sc_ncpu,
91			CPUSTATES * sizeof(int64_t));
92			cp_time = calloc(snmpd_env->sc_ncpu, sizeof(int64_t *));
93			cp_old = calloc(snmpd_env->sc_ncpu, sizeof(int64_t *));
94			cp_diff = calloc(snmpd_env->sc_ncpu, sizeof(int64_t *));
95			if (snmpd_env->sc_cpustates == NULL \|\|
96			cp_time == NULL \|\| cp_old == NULL \|\| cp_diff == NULL)
97			fatal("calloc");
98			for (i = 0; i < snmpd_env->sc_ncpu; i++) {
99			cp_time[i] = calloc(CPUSTATES, sizeof(int64_t));
100			cp_old[i] = calloc(CPUSTATES, sizeof(int64_t));
101			cp_diff[i] = calloc(CPUSTATES, sizeof(int64_t));
102			if (cp_time[i] == NULL \|\| cp_old[i] == NULL \|\|
103			cp_diff[i] == NULL)
104			fatal("calloc");
105			}
106
107			evtimer_set(&cpu_ev, timer_cpu, &cpu_ev);
108			timer_cpu(0, EV_TIMEOUT, &cpu_ev);
109			}
110
111			/*
112			* percentages() function to calculate CPU utilization.
113			* Source code derived from the top(1) utility:
114			*
115			* Copyright (c) 1984, 1989, William LeFebvre, Rice University
116			* Copyright (c) 1989, 1990, 1992, William LeFebvre, Northwestern University
117			*
118			* Redistribution and use in source and binary forms, with or without
119			* modification, are permitted provided that the following conditions
120			* are met:
121			* 1. Redistributions of source code must retain the above copyright
122			* notice, this list of conditions and the following disclaimer.
123			* 2. Redistributions in binary form must reproduce the above copyright
124			* notice, this list of conditions and the following disclaimer in the
125			* documentation and/or other materials provided with the distribution.
126			*
127			* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
128			* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
129			* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
130			* IN NO EVENT SHALL THE AUTHOR OR HIS EMPLOYER BE LIABLE FOR ANY DIRECT, INDIRECT,
131			* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
132			* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
133			* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
134			* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
135			* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
136			* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
137			*/
138			int
139			percentages(int cnt, int64_t out, int64_t new, int64_t old, int64_t diffs)
140			{
141			int64_t change, total_change, *dp, half_total;
142			int i;
143
144			/* initialization */
145			total_change = 0;
146			dp = diffs;
147
148			/* calculate changes for each state and the overall change */
149			for (i = 0; i < cnt; i++) {
150			if ((change = new - old) < 0) {
151			/* this only happens when the counter wraps */
152			change = (new - old);
153			}
154			total_change += (*dp++ = change);
155			old++ = new++;
156			}
157
158			/* avoid divide by zero potential */
159			if (total_change == 0)
160			total_change = 1;
161
162			/* calculate percentages based on overall change, rounding up */
163			half_total = total_change / 2l;
164			for (i = 0; i < cnt; i++)
165			out++ = ((diffs++ * 1000 + half_total) / total_change);
166
167			/* return the total in case the caller wants to use it */
168			return (total_change);
169			}