1 /* 2 * (C) 2011 Thomas Renninger <trenn@suse.de>, Novell Inc. 3 * 4 * Licensed under the terms of the GNU GPL License version 2. 5 */ 6 7 8 #include <unistd.h> 9 #include <stdio.h> 10 #include <stdlib.h> 11 #include <errno.h> 12 #include <string.h> 13 #include <getopt.h> 14 15 #include <cpufreq.h> 16 #include "helpers/helpers.h" 17 #include "helpers/sysfs.h" 18 19 static struct option set_opts[] = { 20 { .name = "perf-bias", .has_arg = optional_argument, .flag = NULL, .val = 'b'}, 21 { .name = "sched-mc", .has_arg = optional_argument, .flag = NULL, .val = 'm'}, 22 { .name = "sched-smt", .has_arg = optional_argument, .flag = NULL, .val = 's'}, 23 { }, 24 }; 25 26 static void print_wrong_arg_exit(void) 27 { 28 printf(_("invalid or unknown argument\n")); 29 exit(EXIT_FAILURE); 30 } 31 32 int cmd_info(int argc, char **argv) 33 { 34 extern char *optarg; 35 extern int optind, opterr, optopt; 36 unsigned int cpu; 37 38 union { 39 struct { 40 int sched_mc:1; 41 int sched_smt:1; 42 int perf_bias:1; 43 }; 44 int params; 45 } params = {}; 46 int ret = 0; 47 48 setlocale(LC_ALL, ""); 49 textdomain(PACKAGE); 50 51 /* parameter parsing */ 52 while ((ret = getopt_long(argc, argv, "msb", set_opts, NULL)) != -1) { 53 switch (ret) { 54 case 'b': 55 if (params.perf_bias) 56 print_wrong_arg_exit(); 57 params.perf_bias = 1; 58 break; 59 case 'm': 60 if (params.sched_mc) 61 print_wrong_arg_exit(); 62 params.sched_mc = 1; 63 break; 64 case 's': 65 if (params.sched_smt) 66 print_wrong_arg_exit(); 67 params.sched_smt = 1; 68 break; 69 default: 70 print_wrong_arg_exit(); 71 } 72 }; 73 74 if (!params.params) 75 params.params = 0x7; 76 77 /* Default is: show output of CPU 0 only */ 78 if (bitmask_isallclear(cpus_chosen)) 79 bitmask_setbit(cpus_chosen, 0); 80 81 if (params.sched_mc) { 82 ret = sysfs_get_sched("mc"); 83 printf(_("System's multi core scheduler setting: ")); 84 if (ret < 0) 85 /* if sysfs file is missing it's: errno == ENOENT */ 86 printf(_("not supported\n")); 87 else 88 printf("%d\n", ret); 89 } 90 if (params.sched_smt) { 91 ret = sysfs_get_sched("smt"); 92 printf(_("System's thread sibling scheduler setting: ")); 93 if (ret < 0) 94 /* if sysfs file is missing it's: errno == ENOENT */ 95 printf(_("not supported\n")); 96 else 97 printf("%d\n", ret); 98 } 99 100 /* Add more per cpu options here */ 101 if (!params.perf_bias) 102 return ret; 103 104 if (params.perf_bias) { 105 if (!run_as_root) { 106 params.perf_bias = 0; 107 printf(_("Intel's performance bias setting needs root privileges\n")); 108 } else if (!(cpupower_cpu_info.caps & CPUPOWER_CAP_PERF_BIAS)) { 109 printf(_("System does not support Intel's performance" 110 " bias setting\n")); 111 params.perf_bias = 0; 112 } 113 } 114 115 /* loop over CPUs */ 116 for (cpu = bitmask_first(cpus_chosen); 117 cpu <= bitmask_last(cpus_chosen); cpu++) { 118 119 if (!bitmask_isbitset(cpus_chosen, cpu) || 120 cpufreq_cpu_exists(cpu)) 121 continue; 122 123 printf(_("analyzing CPU %d:\n"), cpu); 124 125 if (params.perf_bias) { 126 ret = msr_intel_get_perf_bias(cpu); 127 if (ret < 0) { 128 printf(_("Could not read perf-bias value\n")); 129 break; 130 } else 131 printf(_("perf-bias: %d\n"), ret); 132 } 133 } 134 return ret; 135 } 136