Method ParseSmaps

be/src/util/mem-info.cc:109–148

}

MappedMemInfo MemInfo::ParseSmaps() {
  MappedMemInfo result;
  ifstream smaps("/proc/self/smaps", ios::in);
  if (!smaps) {
    LOG_FIRST_N(INFO, 1) << "Could not open smaps";
    return result;
  }
  while (smaps) {
    string line;
    getline(smaps, line);
    if (line.empty()) continue;
    if (isdigit(line[0]) || (line[0] >= 'a' && line[0] <= 'f')) {
      // Line is the start of a new mapping, of form:
      // 561ceff9c000-561ceffa1000 rw-p 00000000 00:00 0
      // We distinguish this case by checking for lower-case hex digits.
      ++result.num_maps;
      continue;
    }
    // Line is in the form of <Name>:<spaces><value>, e.g.:
    // Size:         1084 kB
    // VmFlags: rd ex mr mw me dw
    size_t colon_pos = line.find(':');
    if (colon_pos == string::npos) continue;
    string name = line.substr(0, colon_pos);
    size_t non_space_after_colon_pos = line.find_first_not_of(' ', colon_pos + 1);
    if (non_space_after_colon_pos == string::npos) continue;
    // From the first non-space after the colon through the end of the string.
    string value = line.substr(non_space_after_colon_pos);

    // Use atol() to parse the value, ignoring " kB" suffix.
    if (name == "Size") {
      result.size_kb += atol(value.c_str());
    } else if (name == "Rss") {
      result.rss_kb += atol(value.c_str());
    } else if (name == "AnonHugePages") {
      result.anon_huge_pages_kb += atol(value.c_str());
    }
  }
  return result;
}

ThpConfig MemInfo::ParseThpConfig() {
  ThpConfig result;