hphp/runtime/base/perf-warning-inl.h

   1 /*
   2    +----------------------------------------------------------------------+
   3    | HipHop for PHP                                                       |
   4    +----------------------------------------------------------------------+
   5    | Copyright (c) 2016 Facebook, Inc. (http://www.facebook.com)          |
   6    +----------------------------------------------------------------------+
   7    | This source file is subject to version 3.01 of the PHP license,      |
   8    | that is bundled with this package in the file LICENSE, and is        |
   9    | available through the world-wide-web at the following url:           |
  10    | http://www.php.net/license/3_01.txt                                  |
  11    | If you did not receive a copy of the PHP license and are unable to   |
  12    | obtain it through the world-wide-web, please send a note to          |
  13    | license@php.net so we can mail you a copy immediately.               |
  14    +----------------------------------------------------------------------+
  15 */
  16
  17 #include "hphp/runtime/base/runtime-option.h"
  18
  19 #include <folly/Random.h>
  20
  21 namespace HPHP {
  22
  23 template<typename F>
  24 void logPerfWarningImpl(folly::StringPiece event, int64_t priority,
  25                         int64_t rate, F fillCols) {
  26   auto const effectiveRate = rate * RuntimeOption::EvalPerfWarningSampleRate;
  27   if (effectiveRate > std::numeric_limits<uint32_t>::max()) return;
  28   if (!StructuredLog::coinflip(effectiveRate)) return;
  29
  30   StructuredLogEntry cols;
  31   fillCols(cols);
  32   cols.setStr("event_name", event);
  33   cols.setInt("priority", priority);
  34   StructuredLog::log("hhvm_perf_warning", cols);
  35 }
  36
  37 template<typename F>
  38 void logPerfWarning(folly::StringPiece event, F fillCols) {
  39   logPerfWarningImpl(event, 1, kDefaultPerfWarningRate, fillCols);
  40 }
  41 template<typename F>
  42 void logPerfWarning(folly::StringPiece event, int64_t rate, F fillCols) {
  43   logPerfWarningImpl(event, 1, rate, fillCols);
  44 }
  45
  46 template<typename F>
  47 void logLowPriPerfWarning(folly::StringPiece event, F fillCols) {
  48   logPerfWarningImpl(event, 0, kDefaultPerfWarningRate, fillCols);
  49 }
  50 template<typename F>
  51 void logLowPriPerfWarning(folly::StringPiece event, int64_t rate, F fillCols) {
  52   logPerfWarningImpl(event, 0, rate, fillCols);
  53 }
  54
  55 template<typename AHM>
  56 void checkAHMSubMaps(const AHM& map, folly::StringPiece mapName,
  57                      std::atomic<bool>& done) {
  58   if (LIKELY(map.numSubMaps() == 1) ||
  59       done.load(std::memory_order_acquire) ||
  60       done.exchange(true, std::memory_order_acq_rel)) {
  61     return;
  62   }
  63
  64   logAHMSubMapWarning(mapName);
  65 }
  66
  67 }