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Diffstat (limited to 'tools/power/cpupower/utils/cpufreq-info.c')
-rw-r--r--tools/power/cpupower/utils/cpufreq-info.c669
1 files changed, 669 insertions, 0 deletions
diff --git a/tools/power/cpupower/utils/cpufreq-info.c b/tools/power/cpupower/utils/cpufreq-info.c
new file mode 100644
index 000000000..6efc0f6b1
--- /dev/null
+++ b/tools/power/cpupower/utils/cpufreq-info.c
@@ -0,0 +1,669 @@
+// 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_speed(unsigned long speed)
+{
+ 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));
+ }
+ }
+
+ return;
+}
+
+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);
+ }
+ return;
+}
+
+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_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.family >= 0x10) ||
+ cpupower_cpu_info.vendor == X86_VENDOR_HYGON) {
+ ret = decode_pstates(cpu, cpupower_cpu_info.family, 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;
+}
+
+/* --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);
+
+ freqs = cpufreq_get_boost_frequencies(cpu);
+ if (freqs) {
+ printf(_(" boost frequency steps: "));
+ while (freqs->next) {
+ print_speed(freqs->frequency);
+ printf(", ");
+ freqs = freqs->next;
+ }
+ print_speed(freqs->frequency);
+ 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);
+ } 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 = cpufreq_get_freq_hardware(cpu);
+ printf(_(" current CPU frequency: "));
+ if (!freq) {
+ printf("Unable to call hardware\n");
+ return -EINVAL;
+ }
+ if (human) {
+ print_speed(freq);
+ } 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);
+ printf(" - ");
+ print_speed(max);
+ 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);
+ printf(_(" and "));
+ print_speed(policy->max);
+
+ 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);
+ 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;
+}
+
+/* --latency / -y */
+
+static int get_latency(unsigned int cpu, unsigned int human)
+{
+ unsigned long latency = cpufreq_get_transition_latency(cpu);
+
+ 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;
+}
+
+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_hardware_limits(cpu, 1);
+
+ freqs = cpufreq_get_available_frequencies(cpu);
+ if (freqs) {
+ printf(_(" available frequency steps: "));
+ while (freqs->next) {
+ print_speed(freqs->frequency);
+ printf(", ");
+ freqs = freqs->next;
+ }
+ print_speed(freqs->frequency);
+ 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);
+}
+
+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'},
+ { },
+};
+
+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, "oefwldpgrasmybn", 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':
+ 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 CPU 0 only */
+ if (bitmask_isallclear(cpus_chosen))
+ bitmask_setbit(cpus_chosen, 0);
+
+ 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;
+ }
+ if (ret)
+ return ret;
+ }
+ return ret;
+}
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