How to determine the hardware (CPU and RAM) on a machine?

Question

I\'m working on a cross platform profiling suite, and would like to add information about the machine\'s CPU (architecture/clock speed/cores) and RAM(total) to the report of

Answer 1

The most accepted answer by bsruth on this page using __cpuid loops unnecessarily through not needed extended functions. If all you need to know is the Processor Brand String then there is no need to query 0x80000000.

Wikipedia has a nice explanation with example code: https://en.wikipedia.org/wiki/CPUID#EAX=80000002h,80000003h,80000004h:_Processor_Brand_String

#include   // GCC-provided
#include 
#include 

int main(void) {
    uint32_t brand[12];

    if (!__get_cpuid_max(0x80000004, NULL)) {
        fprintf(stderr, "Feature not implemented.");
        return 2;
    }

    __get_cpuid(0x80000002, brand+0x0, brand+0x1, brand+0x2, brand+0x3);
    __get_cpuid(0x80000003, brand+0x4, brand+0x5, brand+0x6, brand+0x7);
    __get_cpuid(0x80000004, brand+0x8, brand+0x9, brand+0xa, brand+0xb);
    printf("Brand: %s\n", brand);
}

and here is the version i came up with to directly convert it to a std::string in c++

std::string CPUBrandString;
CPUBrandString.resize(49);
uint *CPUInfo = reinterpret_cast(CPUBrandString.data());
for (uint i=0; i<3; i++)
    __cpuid(0x80000002+i, CPUInfo[i*4+0], CPUInfo[i*4+1], CPUInfo[i*4+2], CPUInfo[i*4+3]);
CPUBrandString.assign(CPUBrandString.data()); // correct null terminator
std::cout << CPUBrandString << std::endl;

this version is for linux, but it shouldn't be too hard to figure out for windows using __cpuid