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[v0.87][FREQ] Frequency in udev is now fetched as a per core basis. Before this commit, freq was always fetched from core 0. This allows ARM do detect the max frequency of each of the cores (which may or may not be the same in all of them)

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Dr-Noob
2020-11-22 10:23:02 +01:00
parent 0875c4d425
commit fcb2c716db
5 changed files with 24 additions and 22 deletions
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27
src/common/udev.c
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@@ -13,15 +13,14 @@
#include "../arm/midr.h"
#endif
#define _PATH_SYS_SYSTEM "/sys/devices/system"
#define _PATH_SYS_CPU _PATH_SYS_SYSTEM"/cpu"
#define _PATH_ONE_CPU _PATH_SYS_CPU"/cpu0"
#define _PATH_SYS_SYSTEM "/sys/devices/system"
#define _PATH_SYS_CPU "/cpu"
#define _PATH_FREQUENCY "/cpufreq"
#define _PATH_FREQUENCY_MAX "/cpuinfo_max_freq"
#define _PATH_FREQUENCY_MIN "/cpuinfo_min_freq"
#define _PATH_FREQUENCY _PATH_ONE_CPU"/cpufreq"
#define _PATH_FREQUENCY_MAX _PATH_FREQUENCY"/cpuinfo_max_freq"
#define _PATH_FREQUENCY_MIN _PATH_FREQUENCY"/cpuinfo_min_freq"
#define DEFAULT_FILE_SIZE 4096
#define _PATH_FREQUENCY_MAX_LEN 100
#define DEFAULT_FILE_SIZE 4096
long get_freq_from_file(char* path) {
int fd = open(path, O_RDONLY);
@@ -70,12 +69,16 @@ long get_freq_from_file(char* path) {
return ret/1000;
}
long get_max_freq_from_file() {
return get_freq_from_file(_PATH_FREQUENCY_MAX);
long get_max_freq_from_file(uint32_t core) {
char path[_PATH_FREQUENCY_MAX_LEN];
sprintf(path, "%s%s/cpu%d%s%s", _PATH_SYS_SYSTEM, _PATH_SYS_CPU, core, _PATH_FREQUENCY, _PATH_FREQUENCY_MAX);
return get_freq_from_file(path);
}
long get_min_freq_from_file() {
return get_freq_from_file(_PATH_FREQUENCY_MIN);
long get_min_freq_from_file(uint32_t core) {
char path[_PATH_FREQUENCY_MAX_LEN];
sprintf(path, "%s%s/cpu%d%s%s", _PATH_SYS_SYSTEM, _PATH_SYS_CPU, core, _PATH_FREQUENCY, _PATH_FREQUENCY_MIN);
return get_freq_from_file(path);
}
#ifdef ARCH_ARM

4
src/common/udev.h
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@@ -3,8 +3,8 @@
#include <stdint.h>
long get_max_freq_from_file();
long get_min_freq_from_file();
long get_max_freq_from_file(uint32_t core);
long get_min_freq_from_file(uint32_t core);
#ifdef ARCH_ARM
int get_ncores_from_cpuinfo();