tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/*
2 * (C) 2011 Thomas Renninger <trenn@suse.de>, Novell Inc.
3 *
4 * Licensed under the terms of the GNU GPL License version 2.
5 */
6
7
8#include <unistd.h>
9#include <stdio.h>
10#include <stdlib.h>
11#include <errno.h>
12#include <string.h>
13#include <getopt.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
35 union {
36 struct {
37 int perf_bias:1;
38 };
39 int params;
40 } params = {};
41 int ret = 0;
42
43 setlocale(LC_ALL, "");
44 textdomain(PACKAGE);
45
46 /* parameter parsing */
47 while ((ret = getopt_long(argc, argv, "b", set_opts, NULL)) != -1) {
48 switch (ret) {
49 case 'b':
50 if (params.perf_bias)
51 print_wrong_arg_exit();
52 params.perf_bias = 1;
53 break;
54 default:
55 print_wrong_arg_exit();
56 }
57 };
58
59 if (!params.params)
60 params.params = 0x7;
61
62 /* Default is: show output of CPU 0 only */
63 if (bitmask_isallclear(cpus_chosen))
64 bitmask_setbit(cpus_chosen, 0);
65
66 /* Add more per cpu options here */
67 if (!params.perf_bias)
68 return ret;
69
70 if (params.perf_bias) {
71 if (!run_as_root) {
72 params.perf_bias = 0;
73 printf(_("Intel's performance bias setting needs root privileges\n"));
74 } else if (!(cpupower_cpu_info.caps & CPUPOWER_CAP_PERF_BIAS)) {
75 printf(_("System does not support Intel's performance"
76 " bias setting\n"));
77 params.perf_bias = 0;
78 }
79 }
80
81 /* loop over CPUs */
82 for (cpu = bitmask_first(cpus_chosen);
83 cpu <= bitmask_last(cpus_chosen); cpu++) {
84
85 if (!bitmask_isbitset(cpus_chosen, cpu))
86 continue;
87
88 printf(_("analyzing CPU %d:\n"), cpu);
89
90 if (sysfs_is_cpu_online(cpu) != 1){
91 printf(_(" *is offline\n"));
92 continue;
93 }
94
95 if (params.perf_bias) {
96 ret = msr_intel_get_perf_bias(cpu);
97 if (ret < 0) {
98 fprintf(stderr,
99 _("Could not read perf-bias value[%d]\n"), ret);
100 exit(EXIT_FAILURE);
101 } else
102 printf(_("perf-bias: %d\n"), ret);
103 }
104 }
105 return 0;
106}