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