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tools/power/x86/intel-speed-select: Set scaling_max_freq to base_frequency
When BIOS disables turbo, The scaling_max_freq in cpufreq sysfs will be limited to config level 0 base frequency. But when user selects a higher config levels, this will result in higher base frequency. But since scaling_max_freq is still old base frequency, the performance will still be limited. So when the turbo is disabled and cpufreq base_frequency is higher than scaling_max_freq, update the scaling_max_freq to the base_frequency. Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com> Link: https://lore.kernel.org/r/20201221071859.2783957-2-srinivas.pandruvada@linux.intel.com Signed-off-by: Hans de Goede <hdegoede@redhat.com>
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1 changed files with 21 additions and 0 deletions
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@ -1249,6 +1249,8 @@ static void dump_isst_config(int arg)
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isst_ctdp_display_information_end(outf);
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}
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static void adjust_scaling_max_from_base_freq(int cpu);
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static void set_tdp_level_for_cpu(int cpu, void *arg1, void *arg2, void *arg3,
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void *arg4)
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{
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@ -1267,6 +1269,9 @@ static void set_tdp_level_for_cpu(int cpu, void *arg1, void *arg2, void *arg3,
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int pkg_id = get_physical_package_id(cpu);
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int die_id = get_physical_die_id(cpu);
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/* Wait for updated base frequencies */
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usleep(2000);
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fprintf(stderr, "Option is set to online/offline\n");
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ctdp_level.core_cpumask_size =
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alloc_cpu_set(&ctdp_level.core_cpumask);
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@ -1283,6 +1288,7 @@ static void set_tdp_level_for_cpu(int cpu, void *arg1, void *arg2, void *arg3,
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if (CPU_ISSET_S(i, ctdp_level.core_cpumask_size, ctdp_level.core_cpumask)) {
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fprintf(stderr, "online cpu %d\n", i);
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set_cpu_online_offline(i, 1);
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adjust_scaling_max_from_base_freq(i);
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} else {
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fprintf(stderr, "offline cpu %d\n", i);
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set_cpu_online_offline(i, 0);
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@ -1440,6 +1446,21 @@ static int set_cpufreq_scaling_min_max(int cpu, int max, int freq)
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return 0;
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}
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static int no_turbo(void)
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{
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return parse_int_file(0, "/sys/devices/system/cpu/intel_pstate/no_turbo");
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}
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static void adjust_scaling_max_from_base_freq(int cpu)
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{
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int base_freq, scaling_max_freq;
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scaling_max_freq = parse_int_file(0, "/sys/devices/system/cpu/cpu%d/cpufreq/scaling_max_freq", cpu);
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base_freq = get_cpufreq_base_freq(cpu);
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if (scaling_max_freq < base_freq || no_turbo())
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set_cpufreq_scaling_min_max(cpu, 1, base_freq);
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}
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static int set_clx_pbf_cpufreq_scaling_min_max(int cpu)
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{
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struct isst_pkg_ctdp_level_info *ctdp_level;
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