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#include <string>
#include <boost/predef/os.h>
#if BOOST_OS_LINUX
// Linux
#include <fstream>
#include <regex>
#endif // BOOST_OS_LINUX
#if BOOST_OS_BSD || BOOST_OS_MACOS
// OSX or BSD
#include <sys/types.h>
#include <sys/sysctl.h>
#endif // BOOST_OS_BSD || BOOST_OS_MACOS
#include "HLTrigger/Timer/interface/processor_model.h"
std::string read_processor_model() {
std::string result = "unknown";
#if BOOST_OS_LINUX
// on Linux, read the processor model from /proc/cpuinfo,
// and check the status of SMT from /sys/devices/system/cpu/smt/active
static const std::regex pattern("^model name\\s*:\\s*(.*)", std::regex::optimize);
std::smatch match;
std::ifstream cpuinfo("/proc/cpuinfo", std::ios::in);
std::string line;
while (cpuinfo.good()) {
std::getline(cpuinfo, line);
if (std::regex_match(line, match, pattern)) {
result = match[1];
break;
}
}
std::ifstream smtinfo("/sys/devices/system/cpu/smt/active", std::ios::in);
if (smtinfo) {
int status;
smtinfo >> status;
result += status ? " with SMT enabled" : " with SMT disabled";
}
#endif // BOOST_OS_LINUX
#if BOOST_OS_BSD || BOOST_OS_MACOS
// on BSD and OS X, read the processor model via sysctlbyname("machdep.cpu.brand_string", ...)
std::string result;
size_t len;
sysctlbyname("machdep.cpu.brand_string", nullptr, &len, NULL, 0);
result.resize(len);
sysctlbyname("machdep.cpu.brand_string", result.data(), &len, NULL, 0);
#endif // BOOST_OS_BSD || BOOST_OS_MACOS
return result;
}
const std::string processor_model = read_processor_model();
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