1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
|
#include "collector.h"
#include "../structures/msmetadata.h"
#include "../util/progress/progresslistener.h"
#include "histogramcollection.h"
#include "statisticscollection.h"
#include <aocommon/system.h>
#include <casacore/tables/Tables/ArrayColumn.h>
#include <casacore/tables/Tables/ScalarColumn.h>
#include <memory>
Collector::Collector()
: _mode(CollectDefault),
_dataColumnName("DATA"),
_intervalStart(0),
_intervalEnd(0),
_flaggedTimesteps(0) {}
Collector::~Collector() = default;
void Collector::Collect(const std::string& filename,
StatisticsCollection& statisticsCollection,
HistogramCollection& histogramCollection,
ProgressListener& progressListener) {
progressListener.OnStartTask("Collecting statistics");
std::unique_ptr<MSMetaData> ms(new MSMetaData(filename));
const size_t polarizationCount = ms->PolarizationCount(),
bandCount = ms->BandCount();
const bool ignoreChannelZero =
ms->IsChannelZeroRubish() && _mode != CollectTimeFrequency;
const std::string stationName = ms->GetStationName();
std::vector<BandInfo> bands(bandCount);
std::vector<std::vector<double>> frequencies(bandCount);
for (unsigned b = 0; b < bandCount; ++b) {
bands[b] = ms->GetBandInfo(b);
frequencies[b].resize(bands[b].channels.size());
for (unsigned c = 0; c < bands[b].channels.size(); ++c) {
frequencies[b][c] = bands[b].channels[c].frequencyHz;
}
}
ms.reset();
// Initialize statisticscollection
_statisticsCollection = &statisticsCollection;
_histogramCollection = &histogramCollection;
statisticsCollection.SetPolarizationCount(polarizationCount);
const size_t nCPU = aocommon::system::ProcessorCount();
_threadStats.clear();
for (size_t i = 0; i != nCPU; ++i)
_threadStats.emplace_back(polarizationCount);
if (_mode != CollectHistograms) {
for (unsigned b = 0; b < bandCount; ++b) {
if (ignoreChannelZero)
statisticsCollection.InitializeBand(b, (frequencies[b].data() + 1),
bands[b].channels.size() - 1);
else
statisticsCollection.InitializeBand(b, frequencies[b].data(),
bands[b].channels.size());
for (size_t i = 0; i != nCPU; ++i) {
if (ignoreChannelZero)
_threadStats[i].InitializeBand(b, (frequencies[b].data() + 1),
bands[b].channels.size() - 1);
else
_threadStats[i].InitializeBand(b, frequencies[b].data(),
bands[b].channels.size());
}
}
}
// Initialize Histograms collection
histogramCollection.SetPolarizationCount(polarizationCount);
// get columns
const casacore::Table table(filename);
const casacore::ArrayColumn<casacore::Complex> dataColumn(table,
_dataColumnName);
const casacore::ArrayColumn<bool> flagColumn(table, "FLAG");
const casacore::ScalarColumn<double> timeColumn(table, "TIME");
casacore::ScalarColumn<int> antenna1Column(table, "ANTENNA1"),
antenna2Column(table, "ANTENNA2"), windowColumn(table, "DATA_DESC_ID");
const size_t channelCount = bands[0].channels.size();
_correlatorFlags.assign(channelCount, false);
_correlatorFlagsForBadAntenna.assign(channelCount, true);
aocommon::Lane<Work> workLane(nCPU * 4);
std::vector<std::thread> threads;
for (size_t i = 0; i != nCPU; ++i)
threads.emplace_back(
[&, i]() { process(&workLane, &_threadStats[i], polarizationCount); });
const bool hasInterval = !(_intervalStart == 0 && _intervalEnd == 0);
const size_t nrow = table.nrow();
size_t timestepIndex = (size_t)-1;
double prevtime = -1.0;
for (size_t row = 0; row != nrow; ++row) {
Work work;
work.time = timeColumn(row);
if (work.time != prevtime) {
++timestepIndex;
prevtime = work.time;
}
if (!hasInterval ||
(timestepIndex >= _intervalStart && timestepIndex < _intervalEnd)) {
work.antenna1Index = antenna1Column(row),
work.antenna2Index = antenna2Column(row),
work.bandIndex = windowColumn(row);
work.timestepIndex = timestepIndex;
const BandInfo& band = bands[work.bandIndex];
const casacore::Array<casacore::Complex> dataArray = dataColumn(row);
const casacore::Array<bool> flagArray = flagColumn(row);
work.hasFlaggedAntenna =
_flaggedAntennae.find(work.antenna1Index) != _flaggedAntennae.end() ||
_flaggedAntennae.find(work.antenna2Index) != _flaggedAntennae.end();
casacore::Array<casacore::Complex>::const_contiter dataIter =
dataArray.cbegin();
casacore::Array<bool>::const_contiter flagIter = flagArray.cbegin();
const unsigned startChannel = ignoreChannelZero ? 1 : 0;
if (ignoreChannelZero) {
dataIter += polarizationCount;
flagIter += polarizationCount;
}
work.nChan = band.channels.size() - startChannel;
work.isRFI.resize(polarizationCount);
work.samples.resize(polarizationCount);
for (unsigned p = 0; p < polarizationCount; ++p) {
work.isRFI[p].resize(band.channels.size());
work.samples[p].resize(band.channels.size());
}
for (unsigned channel = startChannel; channel < band.channels.size();
++channel) {
for (unsigned p = 0; p < polarizationCount; ++p) {
work.samples[p][channel - startChannel] = *dataIter;
work.isRFI[p][channel - startChannel] = *flagIter;
++dataIter;
++flagIter;
}
}
workLane.write(std::move(work));
}
progressListener.OnProgress(row, nrow);
}
workLane.write_end();
for (size_t i = 0; i != nCPU; ++i) threads[i].join();
progressListener.OnFinish();
}
void Collector::process(aocommon::Lane<Work>* workLane,
StatisticsCollection* stats, size_t polarizationCount) {
Work work;
HistogramCollection histos(polarizationCount);
while (workLane->read(work)) {
for (unsigned p = 0; p < polarizationCount; ++p) {
switch (_mode) {
case CollectDefault:
if (work.hasFlaggedAntenna || work.timestepIndex < _flaggedTimesteps)
stats->Add(work.antenna1Index, work.antenna2Index, work.time,
work.bandIndex, p,
&reinterpret_cast<float*>(work.samples[p].data())[0],
&reinterpret_cast<float*>(work.samples[p].data())[1],
work.isRFI[p].data(),
_correlatorFlagsForBadAntenna.data(), work.nChan, 2, 1,
1);
else
stats->Add(work.antenna1Index, work.antenna2Index, work.time,
work.bandIndex, p,
&reinterpret_cast<float*>(work.samples[p].data())[0],
&reinterpret_cast<float*>(work.samples[p].data())[1],
work.isRFI[p].data(), _correlatorFlags.data(),
work.nChan, 2, 1, 1);
break;
case CollectHistograms:
histos.Add(work.antenna1Index, work.antenna2Index, p,
work.samples[p].data(), work.isRFI[p].data(), work.nChan);
break;
case CollectTimeFrequency:
if (work.hasFlaggedAntenna || work.timestepIndex < _flaggedTimesteps)
stats->Add(work.antenna1Index, work.antenna2Index, work.time,
work.bandIndex, p,
&reinterpret_cast<float*>(work.samples[p].data())[0],
&reinterpret_cast<float*>(work.samples[p].data())[1],
work.isRFI[p].data(),
_correlatorFlagsForBadAntenna.data(), work.nChan, 2, 1,
1);
else
stats->AddToTimeFrequency(
work.antenna1Index, work.antenna2Index, work.time,
work.bandIndex, p,
&reinterpret_cast<float*>(work.samples[p].data())[0],
&reinterpret_cast<float*>(work.samples[p].data())[1],
work.isRFI[p].data(), _correlatorFlags.data(), work.nChan, 2, 1,
1);
break;
}
}
}
const std::unique_lock<std::mutex> lock(_mutex);
_statisticsCollection->Add(*stats);
_histogramCollection->Add(histos);
}
|
