cpupower-info.c

  1// SPDX-License-Identifier: GPL-2.0-only
  2/*
  3 *  (C) 2011 Thomas Renninger <trenn@suse.de>, Novell Inc.
  4 */
  5
  6
  7#include <unistd.h>
  8#include <stdio.h>
  9#include <stdlib.h>
 10#include <errno.h>
 11#include <string.h>
 12#include <getopt.h>
 13#include <sys/utsname.h>
 14
 15#include "helpers/helpers.h"
 16#include "helpers/sysfs.h"
 17
 18static struct option set_opts[] = {
 19     {"perf-bias", optional_argument, NULL, 'b'},
 20     { },
 21};
 22
 23static void print_wrong_arg_exit(void)
 24{
 25	printf(_("invalid or unknown argument\n"));
 26	exit(EXIT_FAILURE);
 27}
 28
 29int cmd_info(int argc, char **argv)
 30{
 31	extern char *optarg;
 32	extern int optind, opterr, optopt;
 33	unsigned int cpu;
 34	struct utsname uts;
 35
 36	union {
 37		struct {
 38			int perf_bias:1;
 39		};
 40		int params;
 41	} params = {};
 42	int ret = 0;
 43
 44	ret = uname(&uts);
 45	if (!ret && (!strcmp(uts.machine, "ppc64le") ||
 46		     !strcmp(uts.machine, "ppc64"))) {
 47		fprintf(stderr, _("Subcommand not supported on POWER.\n"));
 48		return ret;
 49	}
 50
 51	setlocale(LC_ALL, "");
 52	textdomain(PACKAGE);
 53
 54	/* parameter parsing */
 55	while ((ret = getopt_long(argc, argv, "b", set_opts, NULL)) != -1) {
 56		switch (ret) {
 57		case 'b':
 58			if (params.perf_bias)
 59				print_wrong_arg_exit();
 60			params.perf_bias = 1;
 61			break;
 62		default:
 63			print_wrong_arg_exit();
 64		}
 65	}
 66
 67	if (!params.params)
 68		params.params = 0x7;
 69
 70	/* Default is: show output of base_cpu only */
 71	if (bitmask_isallclear(cpus_chosen))
 72		bitmask_setbit(cpus_chosen, base_cpu);
 73
 74	/* Add more per cpu options here */
 75	if (!params.perf_bias)
 76		return ret;
 77
 78	if (params.perf_bias) {
 79		if (!run_as_root) {
 80			params.perf_bias = 0;
 81			printf(_("Intel's performance bias setting needs root privileges\n"));
 82		} else if (!(cpupower_cpu_info.caps & CPUPOWER_CAP_PERF_BIAS)) {
 83			printf(_("System does not support Intel's performance"
 84				 " bias setting\n"));
 85			params.perf_bias = 0;
 86		}
 87	}
 88
 89	/* loop over CPUs */
 90	for (cpu = bitmask_first(cpus_chosen);
 91	     cpu <= bitmask_last(cpus_chosen); cpu++) {
 92
 93		if (!bitmask_isbitset(cpus_chosen, cpu))
 94			continue;
 95
 96		printf(_("analyzing CPU %d:\n"), cpu);
 97
 98		if (sysfs_is_cpu_online(cpu) != 1){
 99			printf(_(" *is offline\n"));
100			continue;
101		}
102
103		if (params.perf_bias) {
104			ret = cpupower_intel_get_perf_bias(cpu);
105			if (ret < 0) {
106				fprintf(stderr,
107			_("Could not read perf-bias value[%d]\n"), ret);
108				exit(EXIT_FAILURE);
109			} else
110				printf(_("perf-bias: %d\n"), ret);
111		}
112	}
113	return 0;
114}