1 /*
2 * Copyright (c) 2004 The DragonFly Project. All rights reserved.
3 *
4 * This code is derived from software contributed to The DragonFly Project
5 * by Joerg Sonnenberger <joerg@bec.de>.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 *
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in
15 * the documentation and/or other materials provided with the
16 * distribution.
17 * 3. Neither the name of The DragonFly Project nor the names of its
18 * contributors may be used to endorse or promote products derived
19 * from this software without specific, prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
22 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
23 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
24 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
25 * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
26 * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING,
27 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
28 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
29 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
30 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
31 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 * SUCH DAMAGE.
33 */
34
35 #include <sys/kinfo.h>
36 #include <sys/param.h>
37
38 #include <assert.h>
39 #include <err.h>
40 #include <errno.h>
41 #include <kcore.h>
42 #include <kvm.h>
43 #include <nlist.h>
44 #include <stdlib.h>
45
46 #include "kcore_private.h"
47
48 int
kcore_get_cpus(struct kcore_data * kc,int * ncpus)49 kcore_get_cpus(struct kcore_data *kc, int *ncpus)
50 {
51 static struct nlist nl[] = {
52 { "_ncpus", 0, 0, 0, 0},
53 { NULL, 0, 0, 0, 0}
54 };
55
56 /* XXX always include ncpus in the kernel. */
57 if (kcore_get_generic(kc, nl, ncpus, sizeof(*ncpus)))
58 *ncpus = 1;
59 return(0);
60 }
61
62 int
kcore_get_sched_cputime(struct kcore_data * kc,struct kinfo_cputime * cputime)63 kcore_get_sched_cputime(struct kcore_data *kc, struct kinfo_cputime *cputime)
64 {
65 struct kinfo_cputime *percpu = NULL;
66 static struct nlist nl[] = {
67 { "cputime_percpu", 0, 0, 0, 0},
68 { NULL, 0, 0, 0, 0}
69 };
70 size_t len;
71 int cpucount, error = 0;
72
73 _DIAGASSERT(cputime != NULL);
74
75 error = kcore_get_cpus(kc, &cpucount);
76 if (error)
77 goto done;
78
79 len = sizeof(*percpu) * cpucount;
80
81 if ((percpu = malloc(len)) == NULL) {
82 error = ENOMEM;
83 goto done;
84 }
85
86 /* retrieve verbatim per-cpu statistics from kernel core */
87 error = kcore_get_generic(kc, nl, percpu, len);
88 if (error)
89 goto done;
90
91 /* aggregate per-cpu statistics retrieved from kernel core */
92 cputime_pcpu_statistics(percpu, cputime, cpucount);
93
94 done:
95 if (percpu != NULL) {
96 free(percpu);
97 percpu = NULL;
98 }
99 return (error);
100 }
101
102 int
kcore_get_sched_hz(struct kcore_data * kc,int * hz)103 kcore_get_sched_hz(struct kcore_data *kc, int *hz)
104 {
105 static struct nlist nl[] = {
106 { "_hz", 0, 0, 0, 0},
107 { NULL, 0, 0, 0, 0}
108 };
109
110 return(kcore_get_generic(kc, nl, hz, sizeof(*hz)));
111 }
112
113 int
kcore_get_sched_profhz(struct kcore_data * kc,int * profhz)114 kcore_get_sched_profhz(struct kcore_data *kc, int *profhz)
115 {
116 static struct nlist nl[] = {
117 { "_profhz", 0, 0, 0, 0},
118 { NULL, 0, 0, 0, 0}
119 };
120
121 return(kcore_get_generic(kc, nl, profhz, sizeof(*profhz)));
122 }
123
124 int
kcore_get_sched_stathz(struct kcore_data * kc,int * stathz)125 kcore_get_sched_stathz(struct kcore_data *kc, int *stathz)
126 {
127 static struct nlist nl[] = {
128 { "_stathz", 0, 0, 0, 0},
129 { NULL, 0, 0, 0, 0}
130 };
131 int retval;
132
133 retval = kcore_get_generic(kc, nl, stathz, sizeof(*stathz));
134 if (retval == 0 && *stathz == 0)
135 return(kcore_get_sched_hz(kc, stathz));
136 return(retval);
137 }
138