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kernel add
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/*
* (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"
static struct option set_opts[] = {
{"perf-bias", optional_argument, NULL, 'b'},
{ },
};
static void print_wrong_arg_exit(void)
{
printf(_("invalid or unknown argument
"));
exit(EXIT_FAILURE);
}
int cmd_info(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 ret = 0;
setlocale(LC_ALL, "");
textdomain(PACKAGE);
/* 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();
params.perf_bias = 1;
break;
default:
print_wrong_arg_exit();
}
};
if (!params.params)
params.params = 0x7;
/* Default is: show output of CPU 0 only */
if (bitmask_isallclear(cpus_chosen))
bitmask_setbit(cpus_chosen, 0);
/* Add more per cpu options here */
if (!params.perf_bias)
return ret;
if (params.perf_bias) {
if (!run_as_root) {
params.perf_bias = 0;
printf(_("Intel's performance bias setting needs root privileges
"));
} else if (!(cpupower_cpu_info.caps & CPUPOWER_CAP_PERF_BIAS)) {
printf(_("System does not support Intel's performance"
" bias setting
"));
params.perf_bias = 0;
}
}
/* 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;
printf(_("analyzing CPU %d:
"), cpu);
if (params.perf_bias) {
ret = msr_intel_get_perf_bias(cpu);
if (ret < 0) {
fprintf(stderr,
_("Could not read perf-bias value[%d]
"), ret);
exit(EXIT_FAILURE);
} else
printf(_("perf-bias: %d
"), ret);
}
}
return 0;
}
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