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 #include "helpers/bitmask.h"
18
19 static struct option set_opts[] = {
20 {"perf-bias", required_argument, NULL, 'b'},
21 { },
22 };
23
print_wrong_arg_exit(void)24 static void print_wrong_arg_exit(void)
25 {
26 printf(_("invalid or unknown argument\n"));
27 exit(EXIT_FAILURE);
28 }
29
cmd_set(int argc,char ** argv)30 int cmd_set(int argc, char **argv)
31 {
32 extern char *optarg;
33 extern int optind, opterr, optopt;
34 unsigned int cpu;
35
36 union {
37 struct {
38 int perf_bias:1;
39 };
40 int params;
41 } params;
42 int perf_bias = 0;
43 int ret = 0;
44
45 setlocale(LC_ALL, "");
46 textdomain(PACKAGE);
47
48 params.params = 0;
49 /* parameter parsing */
50 while ((ret = getopt_long(argc, argv, "b:",
51 set_opts, NULL)) != -1) {
52 switch (ret) {
53 case 'b':
54 if (params.perf_bias)
55 print_wrong_arg_exit();
56 perf_bias = atoi(optarg);
57 if (perf_bias < 0 || perf_bias > 15) {
58 printf(_("--perf-bias param out "
59 "of range [0-%d]\n"), 15);
60 print_wrong_arg_exit();
61 }
62 params.perf_bias = 1;
63 break;
64 default:
65 print_wrong_arg_exit();
66 }
67 };
68
69 if (!params.params)
70 print_wrong_arg_exit();
71
72 /* Default is: set all CPUs */
73 if (bitmask_isallclear(cpus_chosen))
74 bitmask_setall(cpus_chosen);
75
76 /* loop over CPUs */
77 for (cpu = bitmask_first(cpus_chosen);
78 cpu <= bitmask_last(cpus_chosen); cpu++) {
79
80 if (!bitmask_isbitset(cpus_chosen, cpu))
81 continue;
82
83 if (sysfs_is_cpu_online(cpu) != 1){
84 fprintf(stderr, _("Cannot set values on CPU %d:"), cpu);
85 fprintf(stderr, _(" *is offline\n"));
86 continue;
87 }
88
89 if (params.perf_bias) {
90 ret = msr_intel_set_perf_bias(cpu, perf_bias);
91 if (ret) {
92 fprintf(stderr, _("Error setting perf-bias "
93 "value on CPU %d\n"), cpu);
94 break;
95 }
96 }
97 }
98 return ret;
99 }
100
