processor_model.cc File Reference

#include <string>
#include <boost/predef/os.h>
#include "HLTrigger/Timer/interface/processor_model.h"

Go to the source code of this file.

Functions
std::string	read_processor_model ()

Variables
const std::string	processor_model = read_processor_model()

Function Documentation

read_processor_model()

std::string read_processor_model

(

)

Definition at line 18 of file processor_model.cc.

References recoMuon::in, mps_splice::line, match(), NULL, topSingleLeptonDQM_PU_cfi::pattern, mps_fire::result, mps_update::status, and AlCaHLTBitMon_QueryRunRegistry::string.

                                 {
  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;
}

Variable Documentation

processor_model

const std::string processor_model = read_processor_model()

Definition at line 57 of file processor_model.cc.

Referenced by ThroughputService::preallocate(), and FastTimerService::preallocate().