5113f6f70
 김현기
kernel add
|
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
|
/*
* (C) 2011 Thomas Renninger <trenn@suse.de>, Novell Inc.
*
* Licensed under the terms of the GNU GPL License version 2.
*/
#include <unistd.h>
#include <stdio.h>
#include <stdlib.h>
#include <errno.h>
#include <string.h>
#include <getopt.h>
#include <cpufreq.h>
#include "helpers/helpers.h"
#include "helpers/sysfs.h"
#include "helpers/bitmask.h"
static struct option set_opts[] = {
{"perf-bias", required_argument, NULL, 'b'},
{ },
};
static void print_wrong_arg_exit(void)
{
printf(_("invalid or unknown argument
"));
exit(EXIT_FAILURE);
}
int cmd_set(int argc, char **argv)
{
extern char *optarg;
extern int optind, opterr, optopt;
unsigned int cpu;
union {
struct {
int perf_bias:1;
};
int params;
} params;
int perf_bias = 0;
int ret = 0;
setlocale(LC_ALL, "");
textdomain(PACKAGE);
params.params = 0;
/* parameter parsing */
while ((ret = getopt_long(argc, argv, "b:",
set_opts, NULL)) != -1) {
switch (ret) {
case 'b':
if (params.perf_bias)
print_wrong_arg_exit();
perf_bias = atoi(optarg);
if (perf_bias < 0 || perf_bias > 15) {
printf(_("--perf-bias param out "
"of range [0-%d]
"), 15);
print_wrong_arg_exit();
}
params.perf_bias = 1;
break;
default:
print_wrong_arg_exit();
}
};
if (!params.params)
print_wrong_arg_exit();
/* Default is: set all CPUs */
if (bitmask_isallclear(cpus_chosen))
bitmask_setall(cpus_chosen);
/* loop over CPUs */
for (cpu = bitmask_first(cpus_chosen);
cpu <= bitmask_last(cpus_chosen); cpu++) {
if (!bitmask_isbitset(cpus_chosen, cpu) ||
cpufreq_cpu_exists(cpu))
continue;
if (params.perf_bias) {
ret = msr_intel_set_perf_bias(cpu, perf_bias);
if (ret) {
fprintf(stderr, _("Error setting perf-bias "
"value on CPU %d
"), cpu);
break;
}
}
}
return ret;
}
|