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 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 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 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 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 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