/* * (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 "helpers/helpers.h" #include "helpers/sysfs.h" #include "helpers/bitmask.h" static struct option set_opts[] = { {"perf-bias", required_argument, NULL, 'b'}, { }, }; 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 perf_bias:1; }; int params; } params; int perf_bias = 0; int ret = 0; setlocale(LC_ALL, ""); textdomain(PACKAGE); params.params = 0; /* parameter parsing */ while ((ret = getopt_long(argc, argv, "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; default: print_wrong_arg_exit(); } }; if (!params.params) print_wrong_arg_exit(); /* 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)) continue; if (sysfs_is_cpu_online(cpu) != 1){ fprintf(stderr, _("Cannot set values on CPU %d:"), cpu); fprintf(stderr, _(" *is offline\n")); 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; }