pdns/dnsdist-rings.cc

   1 #include "dnsdist.hh"
   2 #include "lock.hh"
   3
   4 unsigned int Rings::numDistinctRequestors()
   5 {
   6   std::set<ComboAddress, ComboAddress::addressOnlyLessThan> s;
   7   ReadLock rl(&queryLock);
   8   for(const auto& q : queryRing)
   9     s.insert(q.requestor);
  10   return s.size();
  11 }
  12
  13 std::unordered_map<int, vector<boost::variant<string,double>>> Rings::getTopBandwidth(unsigned int numentries)
  14 {
  15   map<ComboAddress, unsigned int, ComboAddress::addressOnlyLessThan> counts;
  16   uint64_t total=0;
  17   {
  18     ReadLock rl(&queryLock);
  19     for(const auto& q : queryRing) {
  20       counts[q.requestor]+=q.size;
  21       total+=q.size;
  22     }
  23   }
  24
  25   {
  26     std::lock_guard<std::mutex> lock(respMutex);
  27     for(const auto& r : respRing) {
  28       counts[r.requestor]+=r.size;
  29       total+=r.size;
  30     }
  31   }
  32
  33   typedef vector<pair<unsigned int, ComboAddress>> ret_t;
  34   ret_t rcounts;
  35   rcounts.reserve(counts.size());
  36   for(const auto& p : counts)
  37     rcounts.push_back({p.second, p.first});
  38   numentries = rcounts.size() < numentries ? rcounts.size() : numentries;
  39   partial_sort(rcounts.begin(), rcounts.begin()+numentries, rcounts.end(), [](const ret_t::value_type&a, const ret_t::value_type&b)
  40                {
  41                  return(b.first < a.first);
  42                });
  43   std::unordered_map<int, vector<boost::variant<string,double>>> ret;
  44   uint64_t rest = 0;
  45   unsigned int count = 1;
  46   for(const auto& rc : rcounts) {
  47     if(count==numentries+1) {
  48       rest+=rc.first;
  49     }
  50     else {
  51       ret.insert({count++, {rc.second.toString(), rc.first, 100.0*rc.first/total}});
  52     }
  53   }
  54   ret.insert({count, {"Rest", rest, total > 0 ? 100.0*rest/total : 100.0}});
  55   return ret;
  56 }