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[v0.88][ARM][BUGFIX] Fetch number of cores from /sys/devices/system/cpu/present file, instead of /proc/cpuinfo. Pay attention to cases where frequency and/or MIDR can not be fetched from cpuinfo. This happens when the CPU has offline cores

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Dr-Noob
2020-11-22 15:18:15 +01:00
parent fcb2c716db
commit 716706d0a7
4 changed files with 56 additions and 20 deletions
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33
src/arm/midr.c
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@@ -5,6 +5,7 @@
#include <stdbool.h>
#include "../common/udev.h"
#include "../common/global.h"
#include "midr.h"
#include "uarch.h"
@@ -131,6 +132,11 @@ struct cpuInfo* get_cpu_info() {
for(int i=0; i < ncores; i++) {
midr_array[i] = get_midr_from_cpuinfo(i);
if(midr_array[i] == UNKNOWN) {
printWarn("Unable to fetch MIDR for core %d. This is probably because the core is offline", i);
midr_array[i] = midr_array[0];
}
}
uint32_t sockets = fill_ids_from_midr(midr_array, ids_array, ncores);
@@ -213,16 +219,25 @@ char* get_soc_name(struct cpuInfo* cpu) {
void print_debug(struct cpuInfo* cpu) {
int ncores = get_ncores_from_cpuinfo();
if(ncores >= 10) {
for(int i=0; i < ncores; i++) {
printf("[Core %02d] 0x%.8X %ld MHz\n", i, get_midr_from_cpuinfo(i), get_max_freq_from_file(i));
for(int i=0; i < ncores; i++) {
printf("[Core %d] ", i);
long freq = get_max_freq_from_file(i);
uint32_t midr = get_midr_from_cpuinfo(i);
if(midr == UNKNOWN) {
printWarn("Unable to fetch MIDR for core %d. This is probably because the core is offline", i);
printf("0x%.8X ", get_midr_from_cpuinfo(0));
}
}
else {
for(int i=0; i < ncores; i++) {
printf("[Core %d] 0x%.8X %ld MHz\n", i, get_midr_from_cpuinfo(i), get_max_freq_from_file(i));
}
}
else {
printf("0x%.8X ", midr);
}
if(freq == UNKNOWN_FREQ) {
printWarn("Unable to fetch max frequency for core %d. This is probably because the core is offline", i);
printf("%ld MHz\n", get_max_freq_from_file(0));
}
else {
printf("%ld MHz\n", freq);
}
}
}
void free_topo_struct(struct topology* topo) {