10 #include "TRACE/tracemf.h"
11 #define TRACE_NAME "RandomDelayFilter"
13 #include "artdaq-core/Utilities/TimeUtils.hh"
15 #include "art/Framework/Core/EDFilter.h"
16 #include "art/Framework/Core/ModuleMacros.h"
17 #include "art/Framework/Principal/Event.h"
18 #include "art/Framework/Principal/Handle.h"
19 #include "art/Framework/Principal/Run.h"
20 #include "art/Framework/Principal/SubRun.h"
21 #include "canvas/Utilities/InputTag.h"
22 #include "fhiclcpp/ParameterSet.h"
29 class RandomDelayFilter;
91 bool filter(art::Event& e)
override;
104 std::mt19937 engine_;
105 std::unique_ptr<std::uniform_real_distribution<double>> uniform_distn_;
106 std::unique_ptr<std::normal_distribution<double>> normal_distn_;
107 std::unique_ptr<std::exponential_distribution<double>> exponential_distn_;
108 std::unique_ptr<std::uniform_int_distribution<int>> pass_distn_;
117 DistType distribution_type_;
122 , min_ms_(p.get<double>(
"minimum_delay_ms", 0))
123 , max_ms_(p.get<double>(
"maximum_delay_ms", 1000))
124 , mean_ms_(p.get<double>(
"mean_delay_ms", 500))
125 , sigma_ms_(p.get<double>(
"sigma_delay_ms", 100))
126 , pass_factor_(p.get<int>(
"pass_filter_percentage", 100))
127 , load_factor_(p.get<double>(
"cpu_load_ratio", 0.5))
128 , engine_(p.get<int64_t>(
"random_seed", time(nullptr)))
129 , pass_distn_(new std::uniform_int_distribution<int>(0, 100))
132 if (pass_factor_ > 100)
136 if (pass_factor_ < 0)
140 if (load_factor_ < 0.0)
144 if (load_factor_ > 1.0)
153 if (min_ms_ > max_ms_)
166 auto type = p.get<std::string>(
"distribution_type",
"Uniform");
167 assert(!type.empty());
172 TLOG(TLVL_INFO) <<
"Generating delay times using Normal distribution with mean " << mean_ms_ <<
" ms, std. dev. " << sigma_ms_ <<
" ms, min " << min_ms_ <<
" ms and max " << max_ms_ <<
"ms.";
173 distribution_type_ = DistType::Normal;
174 if (mean_ms_ < min_ms_)
176 TLOG(TLVL_WARNING) <<
"Mean is smaller than min, setting to min";
180 normal_distn_ = std::make_unique<std::normal_distribution<double>>(mean_ms_, sigma_ms_);
184 TLOG(TLVL_INFO) <<
"Generating delay times using Exponential distribution with mean " << mean_ms_ <<
" ms, min " << min_ms_ <<
" ms and max " << max_ms_ <<
" ms.";
185 distribution_type_ = DistType::Exponential;
186 if (mean_ms_ < min_ms_)
188 TLOG(TLVL_WARNING) <<
"Mean is smaller than min, setting to min";
196 exponential_distn_ = std::make_unique<std::exponential_distribution<double>>(1 / mean_ms_);
200 TLOG(TLVL_INFO) <<
"Generating delay times using Uniform distribution with min " << min_ms_ <<
" ms and max " << max_ms_ <<
" ms.";
201 distribution_type_ = DistType::Uniform;
202 uniform_distn_ = std::make_unique<std::uniform_real_distribution<double>>(min_ms_, max_ms_);
207 TLOG(TLVL_INFO) <<
"Delay time set to " << min_ms_ <<
" ms.";
208 distribution_type_ = DistType::Fixed;
215 double delay = min_ms_;
218 switch (distribution_type_)
220 case DistType::Normal:
221 delay += (*normal_distn_)(engine_);
223 case DistType::Exponential:
224 delay += (*exponential_distn_)(engine_);
226 case DistType::Uniform:
227 delay = (*uniform_distn_)(engine_);
229 case DistType::Fixed:
232 }
while (delay > max_ms_ && delay < min_ms_);
233 TLOG(TLVL_DEBUG) <<
"Simulating processing of event " << e.event() <<
" by delaying " << delay <<
"ms.";
235 usleep(static_cast<unsigned>(1000 * (1 - load_factor_) * delay));
238 auto now = std::chrono::steady_clock::now();
239 while (TimeUtils::GetElapsedTimeMilliseconds(now) < static_cast<size_t>(delay * load_factor_))
241 i = i + 1 % std::numeric_limits<int>::max();
244 return (*pass_distn_)(engine_) < pass_factor_;
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.