[v0.94][x86] Consider missing frequency file in x86_64 as a bug if no hypervisor is present. Took this idea from issue #37. Add if hypervisor is present to debug mode to prevent more confusions in the future

src/arm/midr.c

@@ -52,7 +52,7 @@ struct frequency* get_frequency_info(uint32_t core) {
   struct frequency* freq = malloc(sizeof(struct frequency));
 
   freq->base = UNKNOWN_FREQ;
-  freq->max = get_max_freq_from_file(core);
+  freq->max = get_max_freq_from_file(core, false);
 
   return freq;
 }
@@ -186,7 +186,7 @@ struct cpuInfo* get_cpu_info() {
       midr_array[i] = midr_array[0];
     }
     
-    freq_array[i] = get_max_freq_from_file(i);
+    freq_array[i] = get_max_freq_from_file(i, false);
     if(freq_array[i] == UNKNOWN_FREQ) {
       printWarn("Unable to fetch max frequency for core %d. This is probably because the core is offline", i);
       freq_array[i] = freq_array[0];
@@ -306,7 +306,7 @@ void print_debug(struct cpuInfo* cpu) {
   
   for(int i=0; i < ncores; i++) {
     printf("[Core %d] ", i);
-    long freq = get_max_freq_from_file(i);
+    long freq = get_max_freq_from_file(i, false);
     uint32_t midr = get_midr_from_cpuinfo(i, &success);
     if(!success) {
       printWarn("Unable to fetch MIDR for core %d. This is probably because the core is offline", i);
@@ -317,7 +317,7 @@ void print_debug(struct cpuInfo* cpu) {
     }
     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));
+      printf("%ld MHz\n", get_max_freq_from_file(0, false));
     }
     else {
       printf("%ld MHz\n", freq);    

src/common/udev.c

@@ -28,11 +28,21 @@ char* read_file(char* path, int* len) {
   return buf;
 }
 
-long get_freq_from_file(char* path) {
+long get_freq_from_file(char* path, bool hv_present) {
   int filelen;
   char* buf;
   if((buf = read_file(path, &filelen)) == NULL) {
+    #ifdef ARCH_X86
+      if(hv_present) {
         printWarn("Could not open '%s'", path);
+      }
+      else {
+        perror("open");
+        printBug("Could not open '%s'", path);            
+      }
+    #elif ARCH_ARM
+      printWarn("Could not open '%s'", path); 
+    #endif
     return UNKNOWN_FREQ;
   }
 
@@ -59,14 +69,14 @@ long get_freq_from_file(char* path) {
   return ret/1000;
 }
 
-long get_max_freq_from_file(uint32_t core) {
+long get_max_freq_from_file(uint32_t core, bool hv_present) {
   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);
+  return get_freq_from_file(path, hv_present);
 }
 
-long get_min_freq_from_file(uint32_t core) {
+long get_min_freq_from_file(uint32_t core, bool hv_present) {
   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);
+  return get_freq_from_file(path, hv_present);
 }

src/common/udev.h

@@ -10,6 +10,8 @@
 #include <fcntl.h>
 #include <errno.h>
 
+#include "cpu.h"
+
 #define _PATH_SYS_SYSTEM        "/sys/devices/system"
 #define _PATH_SYS_CPU           "/cpu"
 #define _PATH_FREQUENCY         "/cpufreq"
@@ -20,7 +22,7 @@
 #define DEFAULT_FILE_SIZE       4096
 
 char* read_file(char* path, int* len);
-long get_max_freq_from_file(uint32_t core);
+long get_max_freq_from_file(uint32_t core, bool hv_present);
-long get_min_freq_from_file(uint32_t core);
+long get_min_freq_from_file(uint32_t core, bool hv_present);
 
 #endif

src/x86/cpuid.c

@@ -661,13 +661,28 @@ struct frequency* get_frequency_info(struct cpuInfo* cpu) {
   
   if(cpu->maxLevels < 0x00000016) {
     #ifdef _WIN32
+      if(cpu->hv->present) {
+        printWarn("Can't read frequency information from cpuid (needed level is 0x%.8X, max is 0x%.8X)", 0x00000016, cpu->maxLevels);
+      }
+      else {
         printErr("Can't read frequency information from cpuid (needed level is 0x%.8X, max is 0x%.8X)", 0x00000016, cpu->maxLevels);    
+      }
       freq->base = UNKNOWN_FREQ;
       freq->max = UNKNOWN_FREQ;
     #else
       printWarn("Can't read frequency information from cpuid (needed level is 0x%.8X, max is 0x%.8X). Using udev", 0x00000016, cpu->maxLevels);
       freq->base = UNKNOWN_FREQ;
-      freq->max = get_max_freq_from_file(0);
+      freq->max = get_max_freq_from_file(0, cpu->hv->present);
+      
+      if(freq->max == 0) {
+        if(cpu->hv->present) {
+          printWarn("Read max CPU frequency and got 0 MHz");
+        }
+        else {
+          printBug("Read max CPU frequency and got 0 MHz");    
+        }
+        freq->max = UNKNOWN_FREQ;
+      }
     #endif
   }
   else {
@@ -682,11 +697,21 @@ struct frequency* get_frequency_info(struct cpuInfo* cpu) {
     freq->max = ebx;    
     
     if(freq->base == 0) {
+      if(cpu->hv->present) {
         printWarn("Read base CPU frequency and got 0 MHz");
+      }
+      else {
+        printBug("Read base CPU frequency and got 0 MHz");    
+      }
       freq->base = UNKNOWN_FREQ;
     }
     if(freq->max == 0) {
+      if(cpu->hv->present) {
         printWarn("Read max CPU frequency and got 0 MHz");
+      }
+      else {
+        printBug("Read max CPU frequency and got 0 MHz");    
+      }
       freq->max = UNKNOWN_FREQ;
     }
   }
@@ -870,6 +895,7 @@ char* get_str_fma(struct cpuInfo* cpu) {
 
 void print_debug(struct cpuInfo* cpu) {
   printf("%s\n", cpu->cpu_name);
+  if(cpu->hv->present) printf("- Hypervisor: %s\n", cpu->hv->hv_name);
   printf("- Max standard level: 0x%.8X\n", cpu->maxLevels);
   printf("- Max extended level: 0x%.8X\n", cpu->maxExtendedLevels);