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Viewing changes to tools/power/cpupower/utils/cpupower-info.c

  • Committer: Package Import Robot
  • Author(s): Alessio Igor Bogani
  • Date: 2011-10-26 11:13:05 UTC
  • Revision ID: package-import@ubuntu.com-20111026111305-tz023xykf0i6eosh
Tags: upstream-3.2.0
Import upstream version 3.2.0

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tools/power/cpupower/utils/cpupower-info.c
 
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/*
 
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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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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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        { },
 
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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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        exit(EXIT_FAILURE);
 
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}
 
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int cmd_info(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 ret = 0;
 
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        setlocale(LC_ALL, "");
 
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        textdomain(PACKAGE);
 
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        /* parameter parsing */
 
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        while ((ret = getopt_long(argc, argv, "msb", set_opts, NULL)) != -1) {
 
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                switch (ret) {
 
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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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                        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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                        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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                        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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                params.params = 0x7;
 
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        /* Default is: show output of CPU 0 only */
 
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        if (bitmask_isallclear(cpus_chosen))
 
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                bitmask_setbit(cpus_chosen, 0);
 
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        if (params.sched_mc) {
 
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                ret = sysfs_get_sched("mc");
 
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                printf(_("System's multi core scheduler setting: "));
 
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                if (ret < 0)
 
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                        /* if sysfs file is missing it's: errno == ENOENT */
 
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                        printf(_("not supported\n"));
 
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                else
 
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                        printf("%d\n", ret);
 
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        }
 
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        if (params.sched_smt) {
 
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                ret = sysfs_get_sched("smt");
 
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                printf(_("System's thread sibling scheduler setting: "));
 
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                if (ret < 0)
 
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                        /* if sysfs file is missing it's: errno == ENOENT */
 
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                        printf(_("not supported\n"));
 
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                else
 
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                        printf("%d\n", ret);
 
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        }
 
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        /* Add more per cpu options here */
 
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        if (!params.perf_bias)
 
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                return ret;
 
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        if (params.perf_bias) {
 
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                if (!run_as_root) {
 
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                        params.perf_bias = 0;
 
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                        printf(_("Intel's performance bias setting needs root privileges\n"));
 
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                } else if (!(cpupower_cpu_info.caps & CPUPOWER_CAP_PERF_BIAS)) {
 
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                        printf(_("System does not support Intel's performance"
 
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                                 " bias setting\n"));
 
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                        params.perf_bias = 0;
 
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                }
 
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        }
 
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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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                printf(_("analyzing CPU %d:\n"), cpu);
 
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                if (params.perf_bias) {
 
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                        ret = msr_intel_get_perf_bias(cpu);
 
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                        if (ret < 0) {
 
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                                printf(_("Could not read perf-bias value\n"));
 
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                                break;
 
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                        } else
 
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                                printf(_("perf-bias: %d\n"), ret);
 
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                }
 
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        }
 
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        return ret;
 
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}