// SPDX-License-Identifier: GPL-2.0
#include <stdio.h>
#include <errno.h>
#include <stdlib.h>
#include <string.h>
#include "helpers/helpers.h"
#include "helpers/sysfs.h"
#include "cpufreq.h"
#include "cpupower_intern.h"
#if defined (__i386__) || defined (__x86_64__)
#define MSR_AMD_HWCR 0 xc0010015
int cpufreq_has_x86_boost_support(unsigned int cpu, int *support, int *active,
int *states)
{
int ret;
unsigned long long val;
*support = *active = *states = 0 ;
if (cpupower_cpu_info.caps & CPUPOWER_CAP_AMD_CPB) {
*support = 1 ;
/* AMD Family 0x17 does not utilize PCI D18F4 like prior
* families and has no fixed discrete boost states but
* has Hardware determined variable increments instead .
*/
if (cpupower_cpu_info.caps & CPUPOWER_CAP_AMD_CPB_MSR) {
if (!read_msr(cpu, MSR_AMD_HWCR, &val)) {
if (!(val & CPUPOWER_AMD_CPBDIS))
*active = 1 ;
}
} else {
ret = amd_pci_get_num_boost_states(active, states);
if (ret)
return ret;
}
} else if (cpupower_cpu_info.caps & CPUPOWER_CAP_AMD_PSTATE) {
amd_pstate_boost_init(cpu, support, active);
} else if (cpupower_cpu_info.caps & CPUPOWER_CAP_INTEL_IDA)
*support = *active = 1 ;
return 0 ;
}
int cpupower_intel_get_perf_bias(unsigned int cpu)
{
char linebuf[MAX_LINE_LEN];
char path[SYSFS_PATH_MAX];
unsigned long val;
char *endp;
if (!(cpupower_cpu_info.caps & CPUPOWER_CAP_PERF_BIAS))
return -1 ;
snprintf(path, sizeof (path), PATH_TO_CPU "cpu%u/power/energy_perf_bias" , cpu);
if (cpupower_read_sysfs(path, linebuf, MAX_LINE_LEN) == 0 )
return -1 ;
val = strtol(linebuf, &endp, 0 );
if (endp == linebuf || errno == ERANGE)
return -1 ;
return val;
}
int cpupower_intel_set_perf_bias(unsigned int cpu, unsigned int val)
{
char path[SYSFS_PATH_MAX];
char linebuf[3 ] = {};
if (!(cpupower_cpu_info.caps & CPUPOWER_CAP_PERF_BIAS))
return -1 ;
snprintf(path, sizeof (path), PATH_TO_CPU "cpu%u/power/energy_perf_bias" , cpu);
snprintf(linebuf, sizeof (linebuf), "%d" , val);
if (cpupower_write_sysfs(path, linebuf, 3 ) <= 0 )
return -1 ;
return 0 ;
}
int cpupower_set_epp(unsigned int cpu, char *epp)
{
char path[SYSFS_PATH_MAX];
char linebuf[30 ] = {};
snprintf(path, sizeof (path),
PATH_TO_CPU "cpu%u/cpufreq/energy_performance_preference" , cpu);
if (!is_valid_path(path))
return -1 ;
snprintf(linebuf, sizeof (linebuf), "%s" , epp);
if (cpupower_write_sysfs(path, linebuf, 30 ) <= 0 )
return -1 ;
return 0 ;
}
int cpupower_set_amd_pstate_mode(char *mode)
{
char path[SYSFS_PATH_MAX];
char linebuf[20 ] = {};
snprintf(path, sizeof (path), PATH_TO_CPU "amd_pstate/status" );
if (!is_valid_path(path))
return -1 ;
snprintf(linebuf, sizeof (linebuf), "%s\n" , mode);
if (cpupower_write_sysfs(path, linebuf, 20 ) <= 0 )
return -1 ;
return 0 ;
}
bool cpupower_amd_pstate_enabled(void )
{
char *driver = cpufreq_get_driver(0 );
bool ret = false ;
if (!driver)
return ret;
if (!strncmp(driver, "amd" , 3 ))
ret = true ;
cpufreq_put_driver(driver);
return ret;
}
#endif /* #if defined(__i386__) || defined(__x86_64__) */
int cpufreq_has_generic_boost_support(bool *active)
{
char path[SYSFS_PATH_MAX];
char linebuf[2 ] = {};
unsigned long val;
char *endp;
snprintf(path, sizeof (path), PATH_TO_CPU "cpufreq/boost" );
if (!is_valid_path(path))
return -EACCES;
if (cpupower_read_sysfs(path, linebuf, 2 ) <= 0 )
return -EINVAL;
val = strtoul(linebuf, &endp, 0 );
if (endp == linebuf || errno == ERANGE)
return -EINVAL;
switch (val) {
case 0 :
*active = false ;
break ;
case 1 :
*active = true ;
break ;
default :
return -EINVAL;
}
return 0 ;
}
/* get_cpustate
*
* Gather the information of all online CPUs into bitmask struct
*/
void get_cpustate(void )
{
unsigned int cpu = 0 ;
bitmask_clearall(online_cpus);
bitmask_clearall(offline_cpus);
for (cpu = bitmask_first(cpus_chosen);
cpu <= bitmask_last(cpus_chosen); cpu++) {
if (cpupower_is_cpu_online(cpu) == 1 )
bitmask_setbit(online_cpus, cpu);
else
bitmask_setbit(offline_cpus, cpu);
continue ;
}
}
/* print_online_cpus
*
* Print the CPU numbers of all CPUs that are online currently
*/
void print_online_cpus(void )
{
int str_len = 0 ;
char *online_cpus_str = NULL;
str_len = online_cpus->size * 5 ;
online_cpus_str = (void *)malloc(sizeof (char ) * str_len);
if (!bitmask_isallclear(online_cpus)) {
bitmask_displaylist(online_cpus_str, str_len, online_cpus);
printf(_("Following CPUs are online:\n%s\n" ), online_cpus_str);
}
}
/* print_offline_cpus
*
* Print the CPU numbers of all CPUs that are offline currently
*/
void print_offline_cpus(void )
{
int str_len = 0 ;
char *offline_cpus_str = NULL;
str_len = offline_cpus->size * 5 ;
offline_cpus_str = (void *)malloc(sizeof (char ) * str_len);
if (!bitmask_isallclear(offline_cpus)) {
bitmask_displaylist(offline_cpus_str, str_len, offline_cpus);
printf(_("Following CPUs are offline:\n%s\n" ), offline_cpus_str);
printf(_("cpupower set operation was not performed on them\n" ));
}
}
/*
* print_speed
*
* Print the exact CPU frequency with appropriate unit
*/
void print_speed(unsigned long speed, int no_rounding)
{
unsigned long tmp;
if (no_rounding) {
if (speed > 1000000 )
printf("%u.%06u GHz" , ((unsigned int )speed / 1000000 ),
((unsigned int )speed % 1000000 ));
else if (speed > 1000 )
printf("%u.%03u MHz" , ((unsigned int )speed / 1000 ),
(unsigned int )(speed % 1000 ));
else
printf("%lu kHz" , speed);
} else {
if (speed > 1000000 ) {
tmp = speed % 10000 ;
if (tmp >= 5000 )
speed += 10000 ;
printf("%u.%02u GHz" , ((unsigned int )speed / 1000000 ),
((unsigned int )(speed % 1000000 ) / 10000 ));
} else if (speed > 100000 ) {
tmp = speed % 1000 ;
if (tmp >= 500 )
speed += 1000 ;
printf("%u MHz" , ((unsigned int )speed / 1000 ));
} else if (speed > 1000 ) {
tmp = speed % 100 ;
if (tmp >= 50 )
speed += 100 ;
printf("%u.%01u MHz" , ((unsigned int )speed / 1000 ),
((unsigned int )(speed % 1000 ) / 100 ));
}
}
}
int cpupower_set_turbo_boost(int turbo_boost)
{
char path[SYSFS_PATH_MAX];
char linebuf[2 ] = {};
snprintf(path, sizeof (path), PATH_TO_CPU "cpufreq/boost" );
if (!is_valid_path(path))
return -1 ;
snprintf(linebuf, sizeof (linebuf), "%d" , turbo_boost);
if (cpupower_write_sysfs(path, linebuf, 2 ) <= 0 )
return -1 ;
return 0 ;
}
Messung V0.5 in Prozent C=98 H=99 G=98
¤ Dauer der Verarbeitung: 0.11 Sekunden
(vorverarbeitet am 2026-10-11)
¤
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