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count and sort cpu models on big.little systems
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@martin-frbg
martin-frbg authored Dec 26, 2024
1 parent 17803e7 commit 2fd0a12
Showing 1 changed file with 28 additions and 49 deletions.
77 changes: 28 additions & 49 deletions cpuid_arm64.c
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Original file line number Diff line number Diff line change
Expand Up @@ -25,6 +25,7 @@
USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*****************************************************************************/

#include <stdlib.h>
#include <string.h>
#ifdef __APPLE__
#include <sys/sysctl.h>
Expand All @@ -42,11 +43,9 @@ size_t length64=sizeof(value64);
#define CPU_CORTEXA57 3
#define CPU_CORTEXA72 4
#define CPU_CORTEXA73 5
#define CPU_CORTEXA76 23
#define CPU_NEOVERSEN1 11
#define CPU_NEOVERSEV1 16
#define CPU_NEOVERSEN2 17
#define CPU_NEOVERSEV2 24
#define CPU_CORTEXX1 18
#define CPU_CORTEXX2 19
#define CPU_CORTEXA510 20
Expand Down Expand Up @@ -91,9 +90,7 @@ static char *cpuname[] = {
"CORTEXX2",
"CORTEXA510",
"CORTEXA710",
"FT2000",
"CORTEXA76",
"NEOVERSEV2"
"FT2000"
};

static char *cpuname_lower[] = {
Expand All @@ -119,15 +116,13 @@ static char *cpuname_lower[] = {
"cortexx2",
"cortexa510",
"cortexa710",
"ft2000",
"cortexa76",
"neoversev2"
"ft2000"
};

int get_feature(char *search)
{

#if defined( __linux ) || defined( __NetBSD__ )
#ifdef __linux
FILE *infile;
char buffer[2048], *p,*t;
p = (char *) NULL ;
Expand Down Expand Up @@ -158,33 +153,49 @@ int get_feature(char *search)
#endif
return(0);
}

static int cpusort(const void *model1, const void *model2)
{
return (*(int*)model2-*(int*)model1);
}

int detect(void)
{

#if defined( __linux ) || defined( __NetBSD__ )

#ifdef __linux
int n,i;
int cpucores[1024];
FILE *infile;
char buffer[512], *p, *cpu_part = NULL, *cpu_implementer = NULL;
char cpupart[6];
char buffer[2048], *p, *cpu_part = NULL, *cpu_implementer = NULL;
p = (char *) NULL ;

infile = fopen("/proc/cpuinfo", "r"); while (fgets(buffer, sizeof(buffer), infile)) { if (!strncmp("processor", buffer, 9)) n++; }
fclose(infile);
for (i=0;i<1024;i++)cpucores[i]=0;
cpu_implementer=NULL;
infile = fopen("/proc/cpuinfo", "r");
for (i=0;i<n-1;i++){
while (fgets(buffer, sizeof(buffer), infile)) {
cpu_part=NULL;//cpu_implementer=NULL;
if ((cpu_part != NULL) && (cpu_implementer != NULL)) {
break;
}

if ((cpu_part == NULL) && !strncmp("CPU part", buffer, 8)) {
cpu_part = strchr(buffer, ':') + 2;
cpu_part = strdup(cpu_part);
cpucores[i]=strtol(cpu_part,NULL,0);

} else if ((cpu_implementer == NULL) && !strncmp("CPU implementer", buffer, 15)) {
cpu_implementer = strchr(buffer, ':') + 2;
cpu_implementer = strdup(cpu_implementer);
}
}

}
}
fclose(infile);
qsort(cpucores,1024,sizeof(int),cpusort);
sprintf(cpupart,"0x%3x",cpucores[0]);
cpu_part=strdup(cpupart);
if(cpu_part != NULL && cpu_implementer != NULL) {
// Arm
if (strstr(cpu_implementer, "0x41")) {
Expand Down Expand Up @@ -216,10 +227,6 @@ int detect(void)
return CPU_CORTEXX2;
else if (strstr(cpu_part, "0xd4e")) //X3
return CPU_CORTEXX2;
else if (strstr(cpu_part, "0xd4f")) //NVIDIA Grace et al.
return CPU_NEOVERSEV2;
else if (strstr(cpu_part, "0xd0b"))
return CPU_CORTEXA76;
}
// Qualcomm
else if (strstr(cpu_implementer, "0x51") && strstr(cpu_part, "0xc00"))
Expand Down Expand Up @@ -280,8 +287,6 @@ int detect(void)
sysctlbyname("hw.cpufamily",&value64,&length64,NULL,0);
if (value64 ==131287967|| value64 == 458787763 ) return CPU_VORTEX; //A12/M1
if (value64 == 3660830781) return CPU_VORTEX; //A15/M2
if (value64 == 2271604202) return CPU_VORTEX; //A16/M3
if (value64 == 1867590060) return CPU_VORTEX; //M4
#endif
return CPU_ARMV8;
#endif
Expand Down Expand Up @@ -314,7 +319,7 @@ void get_cpucount(void)
{
int n=0;

#if defined( __linux ) || defined( __NetBSD__ )
#ifdef __linux
FILE *infile;
char buffer[2048], *p,*t;
p = (char *) NULL ;
Expand Down Expand Up @@ -347,7 +352,6 @@ void get_cpuconfig(void)
printf("#define ARMV8\n");
printf("#define HAVE_NEON\n"); // This shouldn't be necessary
printf("#define HAVE_VFPV4\n"); // This shouldn't be necessary

int d = detect();
switch (d)
{
Expand Down Expand Up @@ -402,8 +406,6 @@ void get_cpuconfig(void)
break;

case CPU_NEOVERSEV1:
printf("#define HAVE_SVE 1\n");
case CPU_CORTEXA76:
printf("#define %s\n", cpuname[d]);
printf("#define L1_CODE_SIZE 65536\n");
printf("#define L1_CODE_LINESIZE 64\n");
Expand Down Expand Up @@ -431,32 +433,12 @@ void get_cpuconfig(void)
printf("#define L2_ASSOCIATIVE 8\n");
printf("#define DTB_DEFAULT_ENTRIES 48\n");
printf("#define DTB_SIZE 4096\n");
printf("#define HAVE_SVE 1\n");
break;
case CPU_NEOVERSEV2:
printf("#define ARMV9\n");
printf("#define HAVE_SVE 1\n");
printf("#define %s\n", cpuname[d]);
printf("#define L1_CODE_SIZE 65536\n");
printf("#define L1_CODE_LINESIZE 64\n");
printf("#define L1_CODE_ASSOCIATIVE 4\n");
printf("#define L1_DATA_SIZE 65536\n");
printf("#define L1_DATA_LINESIZE 64\n");
printf("#define L1_DATA_ASSOCIATIVE 4\n");
printf("#define L2_SIZE 1048576\n");
printf("#define L2_LINESIZE 64\n");
printf("#define L2_ASSOCIATIVE 8\n");
// L1 Data TLB = 48 entries
// L2 Data TLB = 2048 entries
printf("#define DTB_DEFAULT_ENTRIES 48\n");
printf("#define DTB_SIZE 4096\n"); // Set to 4096 for symmetry with other configs.
break;
case CPU_CORTEXA510:
case CPU_CORTEXA710:
case CPU_CORTEXX1:
case CPU_CORTEXX2:
printf("#define ARMV9\n");
printf("#define HAVE_SVE 1\n");
printf("#define %s\n", cpuname[d]);
printf("#define L1_CODE_SIZE 65536\n");
printf("#define L1_CODE_LINESIZE 64\n");
Expand Down Expand Up @@ -559,8 +541,6 @@ void get_cpuconfig(void)
case CPU_VORTEX:
printf("#define VORTEX \n");
#ifdef __APPLE__
sysctlbyname("hw.cpufamily",&value64,&length64,NULL,0);
if (value64 == 1867590060) printf("#define HAVE_SME 1\n");; //M4
sysctlbyname("hw.l1icachesize",&value64,&length64,NULL,0);
printf("#define L1_CODE_SIZE %lld \n",value64);
sysctlbyname("hw.cachelinesize",&value64,&length64,NULL,0);
Expand All @@ -575,7 +555,6 @@ void get_cpuconfig(void)
break;
case CPU_A64FX:
printf("#define A64FX\n");
printf("#define HAVE_SVE 1\n");
printf("#define L1_CODE_SIZE 65535\n");
printf("#define L1_DATA_SIZE 65535\n");
printf("#define L1_DATA_LINESIZE 256\n");
Expand Down Expand Up @@ -608,7 +587,7 @@ void get_libname(void)
void get_features(void)
{

#if defined( __linux ) || defined( __NetBSD__ )
#ifdef __linux
FILE *infile;
char buffer[2048], *p,*t;
p = (char *) NULL ;
Expand Down

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