2 * Copyright (c) 2004 The DragonFly Project. All rights reserved.
4 * This code is derived from software contributed to The DragonFly Project
5 * by Joerg Sonnenberger <joerg@bec.de>.
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
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
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.
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,
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31 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 * $DragonFly: src/lib/libkcore/kcore_sched.c,v 1.5 2006/08/03 16:40:46 swildner Exp $
37 #include <sys/kinfo.h>
38 #include <sys/param.h>
48 #include "kcore_private.h"
51 kcore_get_cpus(struct kcore_data *kc, int *ncpus)
53 static struct nlist nl[] = {
54 { "_ncpus", 0, 0, 0, 0},
58 /* XXX always include ncpus in the kernel. */
59 if (kcore_get_generic(kc, nl, ncpus, sizeof(*ncpus)))
65 kcore_get_sched_ccpu(struct kcore_data *kc, int *ccpu)
67 static struct nlist nl[] = {
68 { "_tk_nin", 0, 0, 0, 0},
72 return(kcore_get_generic(kc, nl, ccpu, sizeof(*ccpu)));
76 kcore_get_sched_cputime(struct kcore_data *kc, struct kinfo_cputime *cputime)
78 struct kinfo_cputime *percpu = NULL;
79 static struct nlist nl[] = {
80 { "cputime_percpu", 0, 0, 0, 0},
84 int cpucount, error = 0;
86 _DIAGASSERT(cputime != NULL);
88 error = kcore_get_cpus(kc, &cpucount);
92 len = sizeof(*percpu) * cpucount;
94 if ((percpu = malloc(len)) == NULL) {
99 /* retrieve verbatim per-cpu statistics from kernel core */
100 error = kcore_get_generic(kc, nl, percpu, len);
104 /* aggregate per-cpu statistics retrieved from kernel core */
105 cputime_pcpu_statistics(percpu, cputime, cpucount);
108 if (percpu != NULL) {
116 kcore_get_sched_hz(struct kcore_data *kc, int *hz)
118 static struct nlist nl[] = {
119 { "_hz", 0, 0, 0, 0},
123 return(kcore_get_generic(kc, nl, hz, sizeof(*hz)));
127 kcore_get_sched_profhz(struct kcore_data *kc, int *profhz)
129 static struct nlist nl[] = {
130 { "_profhz", 0, 0, 0, 0},
134 return(kcore_get_generic(kc, nl, profhz, sizeof(*profhz)));
138 kcore_get_sched_stathz(struct kcore_data *kc, int *stathz)
140 static struct nlist nl[] = {
141 { "_stathz", 0, 0, 0, 0},
146 retval = kcore_get_generic(kc, nl, stathz, sizeof(*stathz));
147 if (retval == 0 && *stathz == 0)
148 return(kcore_get_sched_hz(kc, stathz));