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 * $DragonFly: src/lib/libkinfo/kinfo_sched.c,v 1.3 2005/04/27 16:16:30 hmp Exp $ 35 */ 36 37 #include <sys/kinfo.h> 38 #include <sys/param.h> 39 #include <sys/sysctl.h> 40 41 #include <assert.h> 42 #include <stdlib.h> 43 #include <errno.h> 44 #include <kinfo.h> 45 46 int 47 kinfo_get_cpus(int *ncpus) 48 { 49 size_t len = sizeof(*ncpus); 50 51 return(sysctlbyname("hw.ncpu", ncpus, &len, NULL, 0)); 52 } 53 54 int 55 kinfo_get_sched_ccpu(int *ccpu) 56 { 57 size_t len = sizeof(*ccpu); 58 59 return(sysctlbyname("kern.ccpu", ccpu, &len, NULL, 0)); 60 } 61 62 int 63 kinfo_get_sched_cputime(struct kinfo_cputime *cputime) 64 { 65 struct kinfo_cputime *percpu = NULL; 66 size_t len = sizeof(struct kinfo_cputime) * SMP_MAXCPU; 67 int cpucount, error = 0; 68 69 _DIAGASSERT(cputime != NULL); 70 71 if ((percpu = malloc(len)) == NULL) { 72 error = ENOMEM; 73 goto done; 74 } 75 76 /* retrieve verbatim per-cpu statistics from kernel */ 77 if (sysctlbyname("kern.cputime", percpu, &len, NULL, 0) < 0) { 78 error = errno; 79 goto done; 80 } else { 81 percpu = reallocf(percpu, len); 82 if (percpu == NULL) { 83 error = ENOMEM; 84 goto done; 85 } 86 } 87 88 /* aggregate per-cpu statistics retrieved from kernel */ 89 cpucount = len / sizeof(struct kinfo_cputime); 90 cputime_pcpu_statistics(percpu, cputime, cpucount); 91 92 done: 93 if (percpu != NULL) 94 free(percpu); 95 return (error); 96 } 97 98 int 99 kinfo_get_sched_hz(int *hz) 100 { 101 struct kinfo_clockinfo clockinfo; 102 size_t len = sizeof(clockinfo); 103 int retval; 104 105 retval = sysctlbyname("kern.clockrate", &clockinfo, &len, NULL, 0); 106 if (retval) 107 return(retval); 108 109 *hz = clockinfo.ci_hz; 110 return(0); 111 } 112 113 int 114 kinfo_get_sched_stathz(int *stathz) 115 { 116 struct kinfo_clockinfo clockinfo; 117 size_t len = sizeof(clockinfo); 118 int retval; 119 120 retval = sysctlbyname("kern.clockrate", &clockinfo, &len, NULL, 0); 121 if (retval) 122 return(retval); 123 124 *stathz = clockinfo.ci_stathz; 125 return(0); 126 } 127 128 int 129 kinfo_get_sched_profhz(int *profhz) 130 { 131 struct kinfo_clockinfo clockinfo; 132 size_t len = sizeof(clockinfo); 133 int retval; 134 135 retval = sysctlbyname("kern.clockrate", &clockinfo, &len, NULL, 0); 136 if (retval) 137 return(retval); 138 139 *profhz = clockinfo.ci_profhz; 140 return(0); 141 } 142