forked from Minki/linux
154 lines
3.6 KiB
C
154 lines
3.6 KiB
C
/*
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* (C) 2011 Thomas Renninger <trenn@suse.de>, Novell Inc.
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*
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* Licensed under the terms of the GNU GPL License version 2.
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*/
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#include <unistd.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <errno.h>
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#include <string.h>
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#include <getopt.h>
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#include <cpufreq.h>
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#include "helpers/helpers.h"
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#include "helpers/sysfs.h"
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#include "helpers/bitmask.h"
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void set_help(void)
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{
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printf(_("Usage: cpupower set [ -b val ] [ -m val ] [ -s val ]\n"));
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printf(_("Options:\n"));
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printf(_(" -b, --perf-bias [VAL] Sets CPU's power vs performance policy on some\n"
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" Intel models [0-15], see manpage for details\n"));
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printf(_(" -m, --sched-mc [VAL] Sets the kernel's multi core scheduler policy.\n"));
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printf(_(" -s, --sched-smt [VAL] Sets the kernel's thread sibling scheduler policy.\n"));
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printf(_(" -h, --help Prints out this screen\n"));
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printf("\n");
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}
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static struct option set_opts[] = {
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{ .name = "perf-bias", .has_arg = optional_argument, .flag = NULL, .val = 'b'},
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{ .name = "sched-mc", .has_arg = optional_argument, .flag = NULL, .val = 'm'},
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{ .name = "sched-smt", .has_arg = optional_argument, .flag = NULL, .val = 's'},
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{ .name = "help", .has_arg = no_argument, .flag = NULL, .val = 'h'},
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{ },
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};
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static void print_wrong_arg_exit(void)
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{
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printf(_("invalid or unknown argument\n"));
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set_help();
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exit(EXIT_FAILURE);
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}
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int cmd_set(int argc, char **argv)
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{
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extern char *optarg;
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extern int optind, opterr, optopt;
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unsigned int cpu;
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union {
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struct {
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int sched_mc:1;
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int sched_smt:1;
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int perf_bias:1;
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};
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int params;
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} params;
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int sched_mc = 0, sched_smt = 0, perf_bias = 0;
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int ret = 0;
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setlocale(LC_ALL, "");
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textdomain(PACKAGE);
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params.params = 0;
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/* parameter parsing */
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while ((ret = getopt_long(argc, argv, "m:s:b:h",
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set_opts, NULL)) != -1) {
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switch (ret) {
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case 'h':
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set_help();
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return 0;
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case 'b':
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if (params.perf_bias)
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print_wrong_arg_exit();
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perf_bias = atoi(optarg);
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if (perf_bias < 0 || perf_bias > 15) {
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printf(_("--perf-bias param out "
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"of range [0-%d]\n"), 15);
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print_wrong_arg_exit();
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}
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params.perf_bias = 1;
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break;
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case 'm':
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if (params.sched_mc)
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print_wrong_arg_exit();
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sched_mc = atoi(optarg);
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if (sched_mc < 0 || sched_mc > 2) {
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printf(_("--sched-mc param out "
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"of range [0-%d]\n"), 2);
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print_wrong_arg_exit();
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}
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params.sched_mc = 1;
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break;
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case 's':
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if (params.sched_smt)
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print_wrong_arg_exit();
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sched_smt = atoi(optarg);
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if (sched_smt < 0 || sched_smt > 2) {
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printf(_("--sched-smt param out "
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"of range [0-%d]\n"), 2);
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print_wrong_arg_exit();
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}
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params.sched_smt = 1;
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break;
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default:
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print_wrong_arg_exit();
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}
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};
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if (!params.params) {
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set_help();
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return -EINVAL;
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}
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if (params.sched_mc) {
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ret = sysfs_set_sched("mc", sched_mc);
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if (ret)
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fprintf(stderr, _("Error setting sched-mc %s\n"),
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(ret == -ENODEV) ? "not supported" : "");
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}
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if (params.sched_smt) {
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ret = sysfs_set_sched("smt", sched_smt);
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if (ret)
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fprintf(stderr, _("Error setting sched-smt %s\n"),
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(ret == -ENODEV) ? "not supported" : "");
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}
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/* Default is: set all CPUs */
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if (bitmask_isallclear(cpus_chosen))
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bitmask_setall(cpus_chosen);
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/* loop over CPUs */
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for (cpu = bitmask_first(cpus_chosen);
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cpu <= bitmask_last(cpus_chosen); cpu++) {
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if (!bitmask_isbitset(cpus_chosen, cpu) ||
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cpufreq_cpu_exists(cpu))
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continue;
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if (params.perf_bias) {
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ret = msr_intel_set_perf_bias(cpu, perf_bias);
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if (ret) {
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fprintf(stderr, _("Error setting perf-bias "
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"value on CPU %d\n"), cpu);
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break;
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}
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}
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}
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return ret;
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}
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