C言語: ハードウェアパフォーマンスカウンタの情報を表示

CPUIDでハードウェアパフォーマンスカウンタの情報を表示するプログラム．

view plainprint?

1. #include   
2. #include   
3.   
4. #define BIT(x, bit) (((x) >> (bit)) & 0x00000001)  
5.   
6. int main()  
7. {  
8.   unsigned int a, b, c, d;  
9.   unsigned char eax_07_00, eax_15_08, eax_23_16, eax_31_24;  
10.   unsigned char edx_04_00, edx_12_05;  
11.   
12.   asm volatile ("cpuid" : "=a"(a), "=b"(b), "=c"(c), "=d"(d) : "a"(0x0a));  
13.   
14.   printf("CPUID(EAX=0AH): Architectural Performance Monitoring\n");  
15.   
16.   eax_07_00 = (unsigned char)(a & 0xff);  
17.   eax_15_08 = (unsigned char)((a >> 8) & 0xff);  
18.   eax_23_16 = (unsigned char)((a >> 16) & 0xff);  
19.   eax_31_24 = (unsigned char)((a >> 24) & 0xff);  
20.   printf(" Version ID of architectural PM: %d\n", eax_07_00);  
21.   printf(" Number of general-purpose PMC per logical processor: %d\n", eax_15_08);  
22.   printf(" Bit width of general-purpose PMC: %d\n", eax_23_16);  
23.   printf(" Length of EBX bit vector: %d\n", eax_31_24);  
24.   printf("\n");  
25.    
26.   printf(" Core cycle event not available: %d\n", BIT(b, 0));  
27.   printf(" Instruction retired event not available: %d\n", BIT(b, 1));  
28.   printf(" Reference cycles event not available: %d\n", BIT(b, 2));  
29.   printf(" Last-level cache reference event not available: %d\n", BIT(b, 3));  
30.   printf(" Last-level cache misses event not available: %d\n", BIT(b, 4));  
31.   printf(" Branch instrunction retired event not available: %d\n", BIT(b, 5));  
32.   printf(" Branch mispredict retired event not available: %d\n", BIT(b, 6));  
33.   printf("\n");  
34.   
35.   if (eax_07_00 > 1) {  
36.     edx_04_00 = (unsigned char)(d & 0x1f);  
37.     edx_12_05 = (unsigned char)((d >> 5) & 0xff);  
38.     printf(" Number of fixed-function PCs: %d\n", edx_04_00);  
39.     printf(" Bit width of fixed-function PCs: %d\n", edx_12_05);  
40.   }  
41.   
42.   return 0;  
43. }  
44.   

#include 
#include 

#define BIT(x, bit) (((x) >> (bit)) & 0x00000001)

int main()
{
  unsigned int a, b, c, d;
  unsigned char eax_07_00, eax_15_08, eax_23_16, eax_31_24;
  unsigned char edx_04_00, edx_12_05;

  asm volatile ("cpuid" : "=a"(a), "=b"(b), "=c"(c), "=d"(d) : "a"(0x0a));

  printf("CPUID(EAX=0AH): Architectural Performance Monitoring\n");

  eax_07_00 = (unsigned char)(a & 0xff);
  eax_15_08 = (unsigned char)((a >> 8) & 0xff);
  eax_23_16 = (unsigned char)((a >> 16) & 0xff);
  eax_31_24 = (unsigned char)((a >> 24) & 0xff);
  printf(" Version ID of architectural PM: %d\n", eax_07_00);
  printf(" Number of general-purpose PMC per logical processor: %d\n", eax_15_08);
  printf(" Bit width of general-purpose PMC: %d\n", eax_23_16);
  printf(" Length of EBX bit vector: %d\n", eax_31_24);
  printf("\n");
 
  printf(" Core cycle event not available: %d\n", BIT(b, 0));
  printf(" Instruction retired event not available: %d\n", BIT(b, 1));
  printf(" Reference cycles event not available: %d\n", BIT(b, 2));
  printf(" Last-level cache reference event not available: %d\n", BIT(b, 3));
  printf(" Last-level cache misses event not available: %d\n", BIT(b, 4));
  printf(" Branch instrunction retired event not available: %d\n", BIT(b, 5));
  printf(" Branch mispredict retired event not available: %d\n", BIT(b, 6));
  printf("\n");

  if (eax_07_00 > 1) {
    edx_04_00 = (unsigned char)(d & 0x1f);
    edx_12_05 = (unsigned char)((d >> 5) & 0xff);
    printf(" Number of fixed-function PCs: %d\n", edx_04_00);
    printf(" Bit width of fixed-function PCs: %d\n", edx_12_05);
  }

  return 0;
}