From 5f567afc283fc9e7c6a34d013c4fc6c5e8d6afae Mon Sep 17 00:00:00 2001 From: Mario Limonciello Date: Wed, 18 Dec 2024 13:09:54 -0600 Subject: cpupower: Add support for showing energy performance preference The EPP value is useful for characterization of performance. Show it in cpupower frequency-info output. Link: https://lore.kernel.org/r/20241218191144.3440854-6-superm1@kernel.org Signed-off-by: Mario Limonciello Signed-off-by: Shuah Khan --- tools/power/cpupower/utils/cpufreq-info.c | 25 ++++++++++++++++++++++++- 1 file changed, 24 insertions(+), 1 deletion(-) (limited to 'tools/power/cpupower/utils') diff --git a/tools/power/cpupower/utils/cpufreq-info.c b/tools/power/cpupower/utils/cpufreq-info.c index 3df28e45be42..eb9cc0f10634 100644 --- a/tools/power/cpupower/utils/cpufreq-info.c +++ b/tools/power/cpupower/utils/cpufreq-info.c @@ -422,6 +422,23 @@ static int get_freq_stats(unsigned int cpu, unsigned int human) 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) @@ -461,6 +478,7 @@ static void debug_output_one(unsigned int 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); @@ -501,6 +519,7 @@ static struct option info_opts[] = { {"human", no_argument, NULL, 'm'}, {"no-rounding", no_argument, NULL, 'n'}, {"performance", no_argument, NULL, 'c'}, + {"epp", no_argument, NULL, 'z'}, { }, }; @@ -514,7 +533,7 @@ int cmd_freq_info(int argc, char **argv) int output_param = 0; do { - ret = getopt_long(argc, argv, "oefwldpgrasmybnc", info_opts, + ret = getopt_long(argc, argv, "oefwldpgrasmybncz", info_opts, NULL); switch (ret) { case '?': @@ -538,6 +557,7 @@ int cmd_freq_info(int argc, char **argv) case 's': case 'y': case 'c': + case 'z': if (output_param) { output_param = -1; cont = 0; @@ -647,6 +667,9 @@ int cmd_freq_info(int argc, char **argv) case 'c': ret = get_perf_cap(cpu); break; + case 'z': + ret = get_epp(cpu, true); + break; } if (ret) return ret; -- cgit