¡@

Home 

c++ Programming Glossary: cpuid

Difference between rdtscp, rdtsc : memory and cpuid / rdtsc?

http://stackoverflow.com/questions/12631856/difference-between-rdtscp-rdtsc-memory-and-cpuid-rdtsc

between rdtscp rdtsc memory and cpuid rdtsc Assume we're trying to use the tsc for performance monitoring.. two options to prevent reordering 2 This is a call to cpuid and then rdtsc . cpuid is a serializing call. volatile int dont_remove.. reordering 2 This is a call to cpuid and then rdtsc . cpuid is a serializing call. volatile int dont_remove __attribute__..

CPUID implementations in C++

http://stackoverflow.com/questions/1666093/cpuid-implementations-in-c

regs 4 public void load unsigned i #ifdef _WIN32 __cpuid int regs int i #else asm volatile cpuid a regs 0 b regs 1 c.. i #ifdef _WIN32 __cpuid int regs int i #else asm volatile cpuid a regs 0 b regs 1 c regs 2 d regs 3 a i c 0 ECX is set to zero..

Programatically detect number of physical processors/cores or if hyper-threading is active on Windows, Mac and Linux

http://stackoverflow.com/questions/2901694/programatically-detect-number-of-physical-processors-cores-or-if-hyper-threading

std void cpuID unsigned i unsigned regs 4 #ifdef _WIN32 __cpuid int regs int i #else asm volatile cpuid a regs 0 b regs 1 c.. 4 #ifdef _WIN32 __cpuid int regs int i #else asm volatile cpuid a regs 0 b regs 1 c regs 2 d regs 3 a i c 0 ECX is set to zero..

How to check if a CPU supports the SSE3 instruction set?

http://stackoverflow.com/questions/6121792/how-to-check-if-a-cpu-supports-the-sse3-instruction-set

CheckSSE3 int CPUInfo 4 1 Get number of valid info ids __cpuid CPUInfo 0 int nIds CPUInfo 0 Get info for id 1 if nIds 1 __cpuid.. 0 int nIds CPUInfo 0 Get info for id 1 if nIds 1 __cpuid CPUInfo 1 bool bSSE3NewInstructions CPUInfo 2 0x1 false return.. return false c sse instruction set avx cpuid share improve this question I know this was already answered..

Variance in RDTSC overhead

http://stackoverflow.com/questions/6432669/variance-in-rdtsc-overhead

unsigned int hi lo __asm__ __volatile__ xorl eax eax n t cpuid n t rdtsc a lo d hi no inputs rbx rcx return unsigned long long.. the core loop is .L105 #APP # 27 test.cpp 1 xorl eax eax cpuid rdtsc # 0 2 #NO_APP movl edx ebp movl eax edi #APP # 27 test.cpp.. edx ebp movl eax edi #APP # 27 test.cpp 1 xorl eax eax cpuid rdtsc # 0 2 #NO_APP salq 32 rdx salq 32 rbp mov eax eax mov..

Getting Machine Serial number and CPU Id using c/c++ in Linux

http://stackoverflow.com/questions/6491566/getting-machine-serial-number-and-cpu-id-using-c-c-in-linux

the Linux kernel seems to use static inline void native_cpuid unsigned int eax unsigned int ebx unsigned int ecx unsigned.. ecx is often an input as well as an output. asm volatile cpuid a eax b ebx c ecx d edx 0 eax 2 ecx which one then can.. ebx ecx edx eax 1 processor info and feature bits native_cpuid eax ebx ecx edx printf stepping d n eax 0xF printf model d n..

CPUID implementations in C++

http://stackoverflow.com/questions/1666093/cpuid-implementations-in-c

implementations in C I would like to know if somebody around.. know if somebody around here has some good examples of a C CPUID implementation that can be referenced from any of the managed.. differences between X86 and X64 I would like to use CPUID to get info on the machine my software is running on crashreporting..

Programatically detect number of physical processors/cores or if hyper-threading is active on Windows, Mac and Linux

http://stackoverflow.com/questions/2901694/programatically-detect-number-of-physical-processors-cores-or-if-hyper-threading

have CPU threads. In short here are the steps using the CPUID instruction Detect CPU vendor using CPUID function 0 Check for.. steps using the CPUID instruction Detect CPU vendor using CPUID function 0 Check for HTT bit 28 in CPU features EDX from CPUID.. function 0 Check for HTT bit 28 in CPU features EDX from CPUID function 1 Get the logical core count from EBX 23 16 from CPUID..

How to check if a CPU supports the SSE3 instruction set?

http://stackoverflow.com/questions/6121792/how-to-check-if-a-cpu-supports-the-sse3-instruction-set

from MMX all the way to XOP. First you need to access the CPUID instruction #ifdef _WIN32 Windows #define cpuid __cpuid #else..

Getting Machine Serial number and CPU Id using c/c++ in Linux

http://stackoverflow.com/questions/6491566/getting-machine-serial-number-and-cpu-id-using-c-c-in-linux

d n eax 20 0xFF Where a good reference on how to use the CPUID instruction is in this Wikipedia article . share improve this..

CPUID implementations in C++

http://stackoverflow.com/questions/1666093/cpuid-implementations-in-c

using namespace std int main int argc char argv CPUID cpuID cpuID.load 0 Get CPU vendor string vendor vendor string const.. namespace std int main int argc char argv CPUID cpuID cpuID.load 0 Get CPU vendor string vendor vendor string const char.. 0 Get CPU vendor string vendor vendor string const char cpuID.EBX 4 vendor string const char cpuID.EDX 4 vendor string const..

Programatically detect number of physical processors/cores or if hyper-threading is active on Windows, Mac and Linux

http://stackoverflow.com/questions/2901694/programatically-detect-number-of-physical-processors-cores-or-if-hyper-threading

#include iostream #include string using namespace std void cpuID unsigned i unsigned regs 4 #ifdef _WIN32 __cpuid int regs int.. argc char argv unsigned regs 4 Get vendor char vendor 12 cpuID 0 regs unsigned vendor 0 regs 1 EBX unsigned vendor 1 regs 3.. 2 ECX string cpuVendor string vendor 12 Get CPU features cpuID 1 regs unsigned cpuFeatures regs 3 EDX Logical core count per..