154 lines
3.7 KiB
C
154 lines
3.7 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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void info_help(void)
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{
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printf(_("Usage: cpupower info [ -b ] [ -m ] [ -s ]\n"));
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printf(_("Options:\n"));
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printf(_(" -b, --perf-bias Gets 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 Gets the kernel's multi core scheduler policy.\n"));
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printf(_(" -s, --sched-smt Gets 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(_("\nPassing no option will show all info, by default only on core 0\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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info_help();
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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, "msbh", set_opts, NULL)) != -1) {
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switch (ret) {
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case 'h':
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info_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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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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}
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