StorageAccount.cc

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#include "Utilities/StorageFactory/interface/StorageAccount.h"
#include <mutex>
#include <sstream>
#include <unistd.h>
#include <sys/time.h>

namespace {
  char const * const kOperationNames[] = {
    "check",
    "close",
    "construct",
    "destruct",
    "flush",
    "open",
    "position",
    "prefetch",
    "read",
    "readActual",
    "readAsync",
    "readPrefetchToCache",
    "readViaCache",
    "readv",
    "resize",
    "seek",
    "stagein",
    "stat",
    "write",
    "writeActual",
    "writeViaCache",
    "writev"
  };
  
  //Storage class names to the value of the token to which they are assigned
  tbb::concurrent_unordered_map<std::string, int> s_nameToToken;
  std::atomic<int> s_nextTokenValue{0};
}

StorageAccount::StorageStats StorageAccount::m_stats;

static std::string i2str(int i) {
  std::ostringstream t;
  t << i;
  return t.str();
}

static std::string d2str(double d) {
  std::ostringstream t;
  t << d;
  return t.str();
}

inline char const* StorageAccount::operationName(Operation operation) {
  return kOperationNames[static_cast<int>(operation)];
}

StorageAccount::StorageClassToken StorageAccount::tokenForStorageClassName( std::string const & iName) {
  auto itFound = s_nameToToken.find(iName);
  if( itFound != s_nameToToken.end()) {
    return StorageClassToken(itFound->second);
  }
  int value = s_nextTokenValue++;
  
  auto ret = s_nameToToken.insert(std::make_pair(iName, value));
  
  //don't use value since another thread may have beaten us to here
  return StorageClassToken(ret.second);
}

const std::string& StorageAccount::nameForToken( StorageClassToken iToken) {
  for( auto it = s_nameToToken.begin(), itEnd = s_nameToToken.end(); it != itEnd; ++it) {
    if (it->second == iToken.value()) {
      return it->first;
    }
  }
  assert(false);
}


std::string
StorageAccount::summaryText (bool banner /*=false*/) {
  bool first = true;
  std::ostringstream os;
  if (banner)
    os << "stats: class/operation/attempts/successes/amount/time-total/time-min/time-max\n";
  for (auto i = s_nameToToken.begin (); i != s_nameToToken.end(); ++i) {
    auto const& opStats = m_stats[i->second];
    for (auto j = opStats.begin (); j != opStats.end (); ++j, first = false)
      os << (first ? "" : "; ")
         << (i->first) << '/'
         << kOperationNames[j->first] << '='
         << j->second.attempts << '/'
         << j->second.successes << '/'
         << (static_cast<double>(j->second.amount) / 1024 / 1024) << "MB/"
         << (static_cast<double>(j->second.timeTotal) / 1000 / 1000) << "ms/"
         << (static_cast<double>(j->second.timeMin) / 1000 / 1000) << "ms/"
         << (static_cast<double>(j->second.timeMax) / 1000 / 1000) << "ms";
  }
  return os.str ();
}

void
StorageAccount::fillSummary(std::map<std::string, std::string>& summary) {
  int const oneM = 1000 * 1000;
  int const oneMeg = 1024 * 1024;
  for (auto i = s_nameToToken.begin (); i != s_nameToToken.end(); ++i) {
    auto const& opStats = m_stats[i->second];
    for (auto j = opStats.begin(); j != opStats.end(); ++j) {
      std::ostringstream os;
      os << "Timing-" << i->first << "-" << kOperationNames[j->first] << "-";
      summary.insert(std::make_pair(os.str() + "numOperations", i2str(j->second.attempts)));
      summary.insert(std::make_pair(os.str() + "numSuccessfulOperations", i2str(j->second.successes)));
      summary.insert(std::make_pair(os.str() + "totalMegabytes", d2str(static_cast<double>(j->second.amount) / oneMeg)));
      summary.insert(std::make_pair(os.str() + "totalMsecs", d2str(static_cast<double>(j->second.timeTotal) / oneM)));
      summary.insert(std::make_pair(os.str() + "minMsecs", d2str(static_cast<double>(j->second.timeMin) / oneM)));
      summary.insert(std::make_pair(os.str() + "maxMsecs", d2str(static_cast<double>(j->second.timeMax) / oneM)));
    }
  }
}

const StorageAccount::StorageStats&
StorageAccount::summary (void)
{ return m_stats; }

StorageAccount::Counter&
StorageAccount::counter (StorageClassToken token, Operation operation) {
  auto &opstats = m_stats [token.value()];

  return opstats[static_cast<int>(operation)];
}

StorageAccount::Stamp::Stamp (Counter &counter)
  : m_counter (counter),
    m_start (std::chrono::high_resolution_clock::now())
{
  m_counter.attempts++;
}

void
StorageAccount::Stamp::tick (uint64_t amount, int64_t count) const
{
  std::chrono::nanoseconds elapsed_ns = std::chrono::high_resolution_clock::now() - m_start;
  uint64_t elapsed = elapsed_ns.count();
  m_counter.successes++;

  m_counter.vector_count += count;
  m_counter.vector_square += count*count;
  m_counter.amount += amount;
  Counter::addTo(m_counter.amount_square, amount*amount);

  Counter::addTo(m_counter.timeTotal, elapsed);
  if (elapsed < m_counter.timeMin || m_counter.successes == 1)
    m_counter.timeMin = elapsed;
  if (elapsed > m_counter.timeMax)
    m_counter.timeMax = elapsed;
}