artdaq  v3_00_03
RandomDelayFilter_module.cc
1 // Class: RandomDelayFilter
3 // Module Type: filter
4 // File: RandomDelayFilter_module.cc
5 //
6 // Generated at Fri Mar 4 10:45:30 2016 by Eric Flumerfelt using artmod
7 // from cetpkgsupport v1_09_00.
9 
10 #include "art/Framework/Core/EDFilter.h"
11 #include "art/Framework/Core/ModuleMacros.h"
12 #include "art/Framework/Principal/Event.h"
13 #include "art/Framework/Principal/Handle.h"
14 #include "art/Framework/Principal/Run.h"
15 #include "art/Framework/Principal/SubRun.h"
16 #include "canvas/Utilities/InputTag.h"
17 #include "fhiclcpp/ParameterSet.h"
18 
19 #include "artdaq/DAQdata/Globals.hh"
20 
21 #include <memory>
22 #include <random>
23 #include <chrono>
24 
25 namespace artdaq
26 {
27  class RandomDelayFilter;
28 }
29 
37 class artdaq::RandomDelayFilter : public art::EDFilter
38 {
39 public:
54  explicit RandomDelayFilter(fhicl::ParameterSet const& p);
55 
59  RandomDelayFilter(RandomDelayFilter const&) = delete;
60 
65 
71 
77 
87  bool filter(art::Event& e) override;
88 
89 private:
90  // Random Delay Parameters (min/max for uniform, mean/sigma for normal)
91  double min_ms_;
92  double max_ms_;
93  double mean_ms_;
94  double sigma_ms_;
95 
96  int pass_factor_;
97  double load_factor_;
98 
99  // Random Engine Setup
100  bool isNormal_;
101  std::mt19937 engine_;
102  std::unique_ptr<std::uniform_real_distribution<double>> uniform_distn_;
103  std::unique_ptr<std::normal_distribution<double>> normal_distn_;
104  std::unique_ptr<std::uniform_int_distribution<int>> pass_distn_;
105 };
106 
107 
108 artdaq::RandomDelayFilter::RandomDelayFilter(fhicl::ParameterSet const& p)
109  : min_ms_(p.get<double>("minimum_delay_ms", 0))
110  , max_ms_(p.get<double>("maximum_delay_ms", 1000))
111  , mean_ms_(p.get<double>("mean_delay_ms", 500))
112  , sigma_ms_(p.get<double>("sigma_delay_ms", 100))
113  , pass_factor_(p.get<int>("pass_filter_percentage", 100))
114  , load_factor_(p.get<double>("cpu_load_ratio", 1.0))
115  , isNormal_(p.get<bool>("use_normal_distribution", false))
116  , engine_(p.get<int64_t>("random_seed", 271828))
117  , pass_distn_(new std::uniform_int_distribution<int>(0, 100))
118 {
119  // Set limits on parameters
120  if (pass_factor_ > 100) pass_factor_ = 100;
121  if (pass_factor_ < 0) pass_factor_ = 0;
122  if (load_factor_ < 0.0) load_factor_ = 0.0;
123  if (load_factor_ > 1.0) load_factor_ = 1.0;
124 
125  if (min_ms_ < 0) min_ms_ = 0;
126  if (min_ms_ > max_ms_) max_ms_ = min_ms_;
127  if (mean_ms_ < 0) mean_ms_ = 0;
128  if (sigma_ms_ < 0) sigma_ms_ = 0;
129 
130  uniform_distn_.reset(new std::uniform_real_distribution<double>(min_ms_, max_ms_));
131  normal_distn_.reset(new std::normal_distribution<double>(mean_ms_, sigma_ms_));
132 }
133 
135 {
136  double delay = isNormal_ ? (*normal_distn_)(engine_) : (*uniform_distn_)(engine_);
137  TLOG_DEBUG("RandomDelayFilter") << "Simulating processing of event " << e.event() << " by delaying " << std::to_string(delay) << "ms." << TLOG_ENDL;
138 
139  usleep(1000 * (1 - load_factor_) * delay);
140 
141  auto i = 0;
142  auto now = std::chrono::steady_clock::now();
143  while (TimeUtils::GetElapsedTimeMilliseconds(now) < static_cast<size_t>(delay * load_factor_))
144  {
145  i = i + 1 % std::numeric_limits<int>::max();
146  }
147 
148  return (*pass_distn_)(engine_) < pass_factor_;
149 }
150 
151 DEFINE_ART_MODULE(artdaq::RandomDelayFilter)
RandomDelayFilter(fhicl::ParameterSet const &p)
RandomDelayFilter Constructor.
bool filter(art::Event &e) override
Filter is a required override of art::EDFilter, and is called for each event.
A filter which delays for a random amount of time, then drops a random fraction of events...
RandomDelayFilter & operator=(RandomDelayFilter const &)=delete
Copy Assignment operator is deleted.