// SPDX-License-Identifier: GPL-2.0-only
/*
* (C) 2004-2009 Dominik Brodowski <linux@dominikbrodowski.de>
*/
#include <unistd.h>
#include <stdio.h>
#include <errno.h>
#include <stdlib.h>
#include <string.h>
#include <limits.h>
#include <getopt.h>
#include "cpufreq.h"
#include "helpers/sysfs.h"
#include "helpers/helpers.h"
#include "helpers/bitmask.h"
#define LINE_LEN 10
static unsigned int count_cpus(void )
{
FILE *fp;
char value[LINE_LEN];
unsigned int ret = 0;
unsigned int cpunr = 0;
fp = fopen("/proc/stat" , "r" );
if (!fp) {
printf(_("Couldn't count the number of CPUs (%s: %s), assuming 1\n" ), "/proc/stat" , strerror(errno));
return 1;
}
while (!feof(fp)) {
if (!fgets(value, LINE_LEN, fp))
continue ;
value[LINE_LEN - 1] = '\0' ;
if (strlen(value) < (LINE_LEN - 2))
continue ;
if (strstr(value, "cpu " ))
continue ;
if (sscanf(value, "cpu%d " , &cpunr) != 1)
continue ;
if (cpunr > ret)
ret = cpunr;
}
fclose(fp);
/* cpu count starts from 0, on error return 1 (UP) */
return ret + 1;
}
static void proc_cpufreq_output(void )
{
unsigned int cpu, nr_cpus;
struct cpufreq_policy *policy;
unsigned int min_pctg = 0;
unsigned int max_pctg = 0;
unsigned long min, max;
printf(_(" minimum CPU frequency - maximum CPU frequency - governor\n" ));
nr_cpus = count_cpus();
for (cpu = 0; cpu < nr_cpus; cpu++) {
policy = cpufreq_get_policy(cpu);
if (!policy)
continue ;
if (cpufreq_get_hardware_limits(cpu, &min, &max)) {
max = 0;
} else {
min_pctg = (policy->min * 100) / max;
max_pctg = (policy->max * 100) / max;
}
printf("CPU%3d %9lu kHz (%3d %%) - %9lu kHz (%3d %%) - %s\n" ,
cpu , policy->min, max ? min_pctg : 0, policy->max,
max ? max_pctg : 0, policy->governor);
cpufreq_put_policy(policy);
}
}
static int no_rounding;
static void print_duration(unsigned long duration)
{
unsigned long tmp;
if (no_rounding) {
if (duration > 1000000)
printf("%u.%06u ms" , ((unsigned int ) duration/1000000),
((unsigned int ) duration%1000000));
else if (duration > 100000)
printf("%u us" , ((unsigned int ) duration/1000));
else if (duration > 1000)
printf("%u.%03u us" , ((unsigned int ) duration/1000),
((unsigned int ) duration%1000));
else
printf("%lu ns" , duration);
} else {
if (duration > 1000000) {
tmp = duration%10000;
if (tmp >= 5000)
duration += 10000;
printf("%u.%02u ms" , ((unsigned int ) duration/1000000),
((unsigned int ) (duration%1000000)/10000));
} else if (duration > 100000) {
tmp = duration%1000;
if (tmp >= 500)
duration += 1000;
printf("%u us" , ((unsigned int ) duration / 1000));
} else if (duration > 1000) {
tmp = duration%100;
if (tmp >= 50)
duration += 100;
printf("%u.%01u us" , ((unsigned int ) duration/1000),
((unsigned int ) (duration%1000)/100));
} else
printf("%lu ns" , duration);
}
}
static int get_boost_mode_x86(unsigned int cpu)
{
int support, active, b_states = 0, ret, pstate_no, i;
/* ToDo: Make this more global */
unsigned long pstates[MAX_HW_PSTATES] = {0,};
ret = cpufreq_has_x86_boost_support(cpu, &support, &active, &b_states);
if (ret) {
printf(_("Error while evaluating Boost Capabilities"
" on CPU %d -- are you root?\n" ), cpu);
return ret;
}
/* P state changes via MSR are identified via cpuid 80000007
on Intel and AMD, but we assume boost capable machines can do that
if (cpuid_eax(0x80000000) >= 0x80000007
&& (cpuid_edx(0x80000007) & (1 << 7)))
*/
printf(_(" boost state support:\n" ));
printf(_(" Supported: %s\n" ), support ? _("yes" ) : _("no" ));
printf(_(" Active: %s\n" ), active ? _("yes" ) : _("no" ));
if (cpupower_cpu_info.vendor == X86_VENDOR_AMD &&
cpupower_cpu_info.caps & CPUPOWER_CAP_AMD_PSTATE) {
return 0;
} else if ((cpupower_cpu_info.vendor == X86_VENDOR_AMD &&
cpupower_cpu_info.family >= 0x10) ||
cpupower_cpu_info.vendor == X86_VENDOR_HYGON) {
ret = decode_pstates(cpu, b_states, pstates, &pstate_no);
if (ret)
return ret;
printf(_(" Boost States: %d\n" ), b_states);
printf(_(" Total States: %d\n" ), pstate_no);
for (i = 0; i < pstate_no; i++) {
if (!pstates[i])
continue ;
if (i < b_states)
printf(_(" Pstate-Pb%d: %luMHz (boost state)"
"\n" ), i, pstates[i]);
else
printf(_(" Pstate-P%d: %luMHz\n" ),
i - b_states, pstates[i]);
}
} else if (cpupower_cpu_info.caps & CPUPOWER_CAP_HAS_TURBO_RATIO) {
double bclk;
unsigned long long intel_turbo_ratio = 0;
unsigned int ratio;
/* Any way to autodetect this ? */
if (cpupower_cpu_info.caps & CPUPOWER_CAP_IS_SNB)
bclk = 100.00;
else
bclk = 133.33;
intel_turbo_ratio = msr_intel_get_turbo_ratio(cpu);
dprint (" Ratio: 0x%llx - bclk: %f\n" ,
intel_turbo_ratio, bclk);
ratio = (intel_turbo_ratio >> 24) & 0xFF;
if (ratio)
printf(_(" %.0f MHz max turbo 4 active cores\n" ),
ratio * bclk);
ratio = (intel_turbo_ratio >> 16) & 0xFF;
if (ratio)
printf(_(" %.0f MHz max turbo 3 active cores\n" ),
ratio * bclk);
ratio = (intel_turbo_ratio >> 8) & 0xFF;
if (ratio)
printf(_(" %.0f MHz max turbo 2 active cores\n" ),
ratio * bclk);
ratio = (intel_turbo_ratio >> 0) & 0xFF;
if (ratio)
printf(_(" %.0f MHz max turbo 1 active cores\n" ),
ratio * bclk);
}
return 0;
}
static int get_boost_mode_generic(unsigned int cpu)
{
bool active;
if (!cpufreq_has_generic_boost_support(&active)) {
printf(_(" boost state support:\n" ));
printf(_(" Active: %s\n" ), active ? _("yes" ) : _("no" ));
}
return 0;
}
/* --boost / -b */
static int get_boost_mode(unsigned int cpu)
{
struct cpufreq_available_frequencies *freqs;
if (cpupower_cpu_info.vendor == X86_VENDOR_AMD ||
cpupower_cpu_info.vendor == X86_VENDOR_HYGON ||
cpupower_cpu_info.vendor == X86_VENDOR_INTEL)
return get_boost_mode_x86(cpu);
else
get_boost_mode_generic(cpu);
freqs = cpufreq_get_boost_frequencies(cpu);
if (freqs) {
printf(_(" boost frequency steps: " ));
while (freqs->next) {
print_speed(freqs->frequency, no_rounding);
printf(", " );
freqs = freqs->next;
}
print_speed(freqs->frequency, no_rounding);
printf("\n" );
cpufreq_put_available_frequencies(freqs);
}
return 0;
}
/* --freq / -f */
static int get_freq_kernel(unsigned int cpu, unsigned int human)
{
unsigned long freq = cpufreq_get_freq_kernel(cpu);
printf(_(" current CPU frequency: " ));
if (!freq) {
printf(_(" Unable to call to kernel\n" ));
return -EINVAL;
}
if (human) {
print_speed(freq, no_rounding);
} else
printf("%lu" , freq);
printf(_(" (asserted by call to kernel)\n" ));
return 0;
}
/* --hwfreq / -w */
static int get_freq_hardware(unsigned int cpu, unsigned int human)
{
unsigned long freq;
if (cpupower_cpu_info.caps & CPUPOWER_CAP_APERF)
return -EINVAL;
freq = cpufreq_get_freq_hardware(cpu);
printf(_(" current CPU frequency: " ));
if (!freq) {
printf("Unable to call hardware\n" );
return -EINVAL;
}
if (human) {
print_speed(freq, no_rounding);
} else
printf("%lu" , freq);
printf(_(" (asserted by call to hardware)\n" ));
return 0;
}
/* --hwlimits / -l */
static int get_hardware_limits(unsigned int cpu, unsigned int human)
{
unsigned long min, max;
if (cpufreq_get_hardware_limits(cpu, &min, &max)) {
printf(_("Not Available\n" ));
return -EINVAL;
}
if (human) {
printf(_(" hardware limits: " ));
print_speed(min, no_rounding);
printf(" - " );
print_speed(max, no_rounding);
printf("\n" );
} else {
printf("%lu %lu\n" , min, max);
}
return 0;
}
/* --driver / -d */
static int get_driver(unsigned int cpu)
{
char *driver = cpufreq_get_driver(cpu);
if (!driver) {
printf(_(" no or unknown cpufreq driver is active on this CPU\n" ));
return -EINVAL;
}
printf(" driver: %s\n" , driver);
cpufreq_put_driver(driver);
return 0;
}
/* --policy / -p */
static int get_policy(unsigned int cpu)
{
struct cpufreq_policy *policy = cpufreq_get_policy(cpu);
if (!policy) {
printf(_(" Unable to determine current policy\n" ));
return -EINVAL;
}
printf(_(" current policy: frequency should be within " ));
print_speed(policy->min, no_rounding);
printf(_(" and " ));
print_speed(policy->max, no_rounding);
printf(".\n " );
printf(_("The governor \" %s\" may decide which speed to use\n"
" within this range.\n" ),
policy->governor);
cpufreq_put_policy(policy);
return 0;
}
/* --governors / -g */
static int get_available_governors(unsigned int cpu)
{
struct cpufreq_available_governors *governors =
cpufreq_get_available_governors(cpu);
printf(_(" available cpufreq governors: " ));
if (!governors) {
printf(_("Not Available\n" ));
return -EINVAL;
}
while (governors->next) {
printf("%s " , governors->governor);
governors = governors->next;
}
printf("%s\n" , governors->governor);
cpufreq_put_available_governors(governors);
return 0;
}
/* --affected-cpus / -a */
static int get_affected_cpus(unsigned int cpu)
{
struct cpufreq_affected_cpus *cpus = cpufreq_get_affected_cpus(cpu);
printf(_(" CPUs which need to have their frequency coordinated by software: " ));
if (!cpus) {
printf(_("Not Available\n" ));
return -EINVAL;
}
while (cpus->next) {
printf("%d " , cpus->cpu);
cpus = cpus->next;
}
printf("%d\n" , cpus->cpu);
cpufreq_put_affected_cpus(cpus);
return 0;
}
/* --related-cpus / -r */
static int get_related_cpus(unsigned int cpu)
{
struct cpufreq_affected_cpus *cpus = cpufreq_get_related_cpus(cpu);
printf(_(" CPUs which run at the same hardware frequency: " ));
if (!cpus) {
printf(_("Not Available\n" ));
return -EINVAL;
}
while (cpus->next) {
printf("%d " , cpus->cpu);
cpus = cpus->next;
}
printf("%d\n" , cpus->cpu);
cpufreq_put_related_cpus(cpus);
return 0;
}
/* --stats / -s */
static int get_freq_stats(unsigned int cpu, unsigned int human)
{
unsigned long total_trans = cpufreq_get_transitions(cpu);
unsigned long long total_time;
struct cpufreq_stats *stats = cpufreq_get_stats(cpu, &total_time);
while (stats) {
if (human) {
print_speed(stats->frequency, no_rounding);
printf(":%.2f%%" ,
(100.0 * stats->time_in_state) / total_time);
} else
printf("%lu:%llu" ,
stats->frequency, stats->time_in_state);
stats = stats->next;
if (stats)
printf(", " );
}
cpufreq_put_stats(stats);
if (total_trans)
printf(" (%lu)\n" , total_trans);
return 0;
}
/* --epp / -z */
static int get_epp(unsigned int cpu, bool interactive)
{
char *epp;
epp = cpufreq_get_energy_performance_preference(cpu);
if (!epp)
return -EINVAL;
if (interactive)
printf(_(" energy performance preference: %s\n" ), epp);
cpufreq_put_energy_performance_preference(epp);
return 0;
}
/* --latency / -y */
static int get_latency(unsigned int cpu, unsigned int human)
{
unsigned long latency = cpufreq_get_transition_latency(cpu);
if (!get_epp(cpu, false ))
return -EINVAL;
printf(_(" maximum transition latency: " ));
if (!latency || latency == UINT_MAX) {
printf(_(" Cannot determine or is not supported.\n" ));
return -EINVAL;
}
if (human) {
print_duration(latency);
printf("\n" );
} else
printf("%lu\n" , latency);
return 0;
}
/* --performance / -c */
static int get_perf_cap(unsigned int cpu)
{
if (cpupower_cpu_info.vendor == X86_VENDOR_AMD &&
cpupower_cpu_info.caps & CPUPOWER_CAP_AMD_PSTATE)
amd_pstate_show_perf_and_freq(cpu, no_rounding);
return 0;
}
static void debug_output_one(unsigned int cpu)
{
struct cpufreq_available_frequencies *freqs;
get_driver(cpu);
get_related_cpus(cpu);
get_affected_cpus(cpu);
get_latency(cpu, 1);
get_epp(cpu, true );
get_hardware_limits(cpu, 1);
freqs = cpufreq_get_available_frequencies(cpu);
if (freqs) {
printf(_(" available frequency steps: " ));
while (freqs->next) {
print_speed(freqs->frequency, no_rounding);
printf(", " );
freqs = freqs->next;
}
print_speed(freqs->frequency, no_rounding);
printf("\n" );
cpufreq_put_available_frequencies(freqs);
}
get_available_governors(cpu);
get_policy(cpu);
if (get_freq_hardware(cpu, 1) < 0)
get_freq_kernel(cpu, 1);
get_boost_mode(cpu);
get_perf_cap(cpu);
}
static struct option info_opts[] = {
{"debug" , no_argument, NULL, 'e' },
{"boost" , no_argument, NULL, 'b' },
{"freq" , no_argument, NULL, 'f' },
{"hwfreq" , no_argument, NULL, 'w' },
{"hwlimits" , no_argument, NULL, 'l' },
{"driver" , no_argument, NULL, 'd' },
{"policy" , no_argument, NULL, 'p' },
{"governors" , no_argument, NULL, 'g' },
{"related-cpus" , no_argument, NULL, 'r' },
{"affected-cpus" , no_argument, NULL, 'a' },
{"stats" , no_argument, NULL, 's' },
{"latency" , no_argument, NULL, 'y' },
{"proc" , no_argument, NULL, 'o' },
{"human" , no_argument, NULL, 'm' },
{"no-rounding" , no_argument, NULL, 'n' },
{"performance" , no_argument, NULL, 'c' },
{"epp" , no_argument, NULL, 'z' },
{ },
};
int cmd_freq_info(int argc, char **argv)
{
extern char *optarg;
extern int optind, opterr, optopt;
int ret = 0, cont = 1;
unsigned int cpu = 0;
unsigned int human = 0;
int output_param = 0;
do {
ret = getopt_long(argc, argv, "oefwldpgrasmybncz" , info_opts,
NULL);
switch (ret) {
case '?' :
output_param = '?' ;
cont = 0;
break ;
case -1:
cont = 0;
break ;
case 'b' :
case 'o' :
case 'a' :
case 'r' :
case 'g' :
case 'p' :
case 'd' :
case 'l' :
case 'w' :
case 'f' :
case 'e' :
case 's' :
case 'y' :
case 'c' :
case 'z' :
if (output_param) {
output_param = -1;
cont = 0;
break ;
}
output_param = ret;
break ;
case 'm' :
if (human) {
output_param = -1;
cont = 0;
break ;
}
human = 1;
break ;
case 'n' :
no_rounding = 1;
break ;
default :
fprintf(stderr, "invalid or unknown argument\n" );
return EXIT_FAILURE;
}
} while (cont);
switch (output_param) {
case 'o' :
if (!bitmask_isallclear(cpus_chosen)) {
printf(_("The argument passed to this tool can't be "
"combined with passing a --cpu argument\n" ));
return -EINVAL;
}
break ;
case 0:
output_param = 'e' ;
}
ret = 0;
/* Default is: show output of base_cpu only */
if (bitmask_isallclear(cpus_chosen))
bitmask_setbit(cpus_chosen, base_cpu);
switch (output_param) {
case -1:
printf(_("You can't specify more than one --cpu parameter and/or\n"
"more than one output-specific argument\n" ));
return -EINVAL;
case '?' :
printf(_("invalid or unknown argument\n" ));
return -EINVAL;
case 'o' :
proc_cpufreq_output();
return EXIT_SUCCESS;
}
for (cpu = bitmask_first(cpus_chosen);
cpu <= bitmask_last(cpus_chosen); cpu++) {
if (!bitmask_isbitset(cpus_chosen, cpu))
continue ;
printf(_("analyzing CPU %d:\n" ), cpu);
if (sysfs_is_cpu_online(cpu) != 1) {
printf(_(" *is offline\n" ));
printf("\n" );
continue ;
}
switch (output_param) {
case 'b' :
get_boost_mode(cpu);
break ;
case 'e' :
debug_output_one(cpu);
break ;
case 'a' :
ret = get_affected_cpus(cpu);
break ;
case 'r' :
ret = get_related_cpus(cpu);
break ;
case 'g' :
ret = get_available_governors(cpu);
break ;
case 'p' :
ret = get_policy(cpu);
break ;
case 'd' :
ret = get_driver(cpu);
break ;
case 'l' :
ret = get_hardware_limits(cpu, human);
break ;
case 'w' :
ret = get_freq_hardware(cpu, human);
break ;
case 'f' :
ret = get_freq_kernel(cpu, human);
break ;
case 's' :
ret = get_freq_stats(cpu, human);
break ;
case 'y' :
ret = get_latency(cpu, human);
break ;
case 'c' :
ret = get_perf_cap(cpu);
break ;
case 'z' :
ret = get_epp(cpu, true );
break ;
}
if (ret)
return ret;
}
return ret;
}
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