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 #include <sys/sysctl.h> 38 39 #include <assert.h> 40 #include <stdlib.h> 41 #include <errno.h> 42 #include <kinfo.h> 43 44 int 45 kinfo_get_cpus(int *ncpus) 46 { 47 size_t len = sizeof(*ncpus); 48 49 return(sysctlbyname("hw.ncpu", ncpus, &len, NULL, 0)); 50 } 51 52 int 53 kinfo_get_sched_cputime(struct kinfo_cputime *cputime) 54 { 55 struct kinfo_cputime *percpu = NULL; 56 size_t len = sizeof(struct kinfo_cputime) * SMP_MAXCPU; 57 int cpucount, error = 0; 58 59 _DIAGASSERT(cputime != NULL); 60 61 if ((percpu = malloc(len)) == NULL) { 62 error = ENOMEM; 63 goto done; 64 } 65 66 /* retrieve verbatim per-cpu statistics from kernel */ 67 if (sysctlbyname("kern.cputime", percpu, &len, NULL, 0) < 0) { 68 error = errno; 69 goto done; 70 } else { 71 percpu = reallocf(percpu, len); 72 if (percpu == NULL) { 73 error = ENOMEM; 74 goto done; 75 } 76 } 77 78 /* aggregate per-cpu statistics retrieved from kernel */ 79 cpucount = len / sizeof(struct kinfo_cputime); 80 cputime_pcpu_statistics(percpu, cputime, cpucount); 81 82 done: 83 if (percpu != NULL) 84 free(percpu); 85 return (error); 86 } 87 88 int 89 kinfo_get_sched_hz(int *hz) 90 { 91 struct kinfo_clockinfo clockinfo; 92 size_t len = sizeof(clockinfo); 93 int retval; 94 95 retval = sysctlbyname("kern.clockrate", &clockinfo, &len, NULL, 0); 96 if (retval) 97 return(retval); 98 99 *hz = clockinfo.ci_hz; 100 return(0); 101 } 102 103 int 104 kinfo_get_sched_stathz(int *stathz) 105 { 106 struct kinfo_clockinfo clockinfo; 107 size_t len = sizeof(clockinfo); 108 int retval; 109 110 retval = sysctlbyname("kern.clockrate", &clockinfo, &len, NULL, 0); 111 if (retval) 112 return(retval); 113 114 *stathz = clockinfo.ci_stathz; 115 return(0); 116 } 117 118 int 119 kinfo_get_sched_profhz(int *profhz) 120 { 121 struct kinfo_clockinfo clockinfo; 122 size_t len = sizeof(clockinfo); 123 int retval; 124 125 retval = sysctlbyname("kern.clockrate", &clockinfo, &len, NULL, 0); 126 if (retval) 127 return(retval); 128 129 *profhz = clockinfo.ci_profhz; 130 return(0); 131 } 132