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
|
// This program causes/caused some versions of egcs to crash.
#include <blitz/benchext.h>
#include <random/uniform.h>
#include <blitz/array.h>
#ifdef BZ_HAVE_COMPLEX
void initializeRandomDouble(double* data, int numElements);
using namespace blitz;
int QCDBlitzVersion(BenchmarkExt<int>& bench);
int QCDBlitzTunedVersion(BenchmarkExt<int>& bench);
int dontActuallyRunBenchmark()
{
return 1;
}
int main()
{
if (dontActuallyRunBenchmark())
return 0;
cout << "Blitz++ QCD Benchmark" << endl
<< "Working... (this may take a while) ";
cout.flush();
BenchmarkExt<int> bench("Lattice QCD Benchmark", 2);
//bench.setRateDescription("Millions of operations/s"); \todo removed for now
bench.beginBenchmarking();
QCDBlitzVersion(bench);
QCDBlitzTunedVersion(bench);
bench.endBenchmarking();
bench.saveMatlabGraph("qcd.m");
cout << "Done." << endl;
return 0;
}
int QCDBlitzVersion(BenchmarkExt<int>& bench)
{
typedef TinyMatrix<complex<double>, 3, 2> spinor;
typedef TinyMatrix<complex<double>, 3, 3> SU3Gauge;
bench.beginImplementation("Blitz++");
while (!bench.doneImplementationBenchmark())
{
int length = bench.getParameter();
int iters = (int)bench.getIterations();
Array<spinor,1> res(length), src(length);
Array<SU3Gauge,1> M(length);
initializeRandomDouble((double*)src.data(),
length * sizeof(spinor) / sizeof(double));
initializeRandomDouble((double*)M.data(),
length * sizeof(SU3Gauge) / sizeof(double));
bench.start();
long i;
for (i=0; i < iters; ++i)
{
for (int i=0; i < length; ++i)
res(i) = M(i)*src(i);
}
bench.stop();
// Time overhead
bench.startOverhead();
for (i=0; i < iters; ++i)
{
}
bench.stopOverhead();
}
bench.endImplementation();
return 0;
}
typedef TinyMatrix<complex<double>, 3, 2> spinor;
typedef TinyMatrix<complex<double>, 3, 3> gaugeFieldElement;
struct latticeUnit {
spinor one;
gaugeFieldElement gauge;
spinor two;
};
int QCDBlitzTunedVersion(BenchmarkExt<int>& bench)
{
bench.beginImplementation("Blitz++ (tuned)");
while (!bench.doneImplementationBenchmark())
{
int length = bench.getParameter();
int iters = (int)bench.getIterations();
Array<latticeUnit,1> lattice(length);
initializeRandomDouble((double*)lattice.data(),
length * sizeof(latticeUnit) / sizeof(double));
bench.start();
long i;
for (i=0; i < iters; ++i)
{
for (int i=0; i < length; ++i)
lattice(i).two = lattice(i).gauge * lattice(i).two;
}
bench.stop();
// Time overhead
bench.startOverhead();
for (i=0; i < iters; ++i)
{
}
bench.stopOverhead();
}
bench.endImplementation();
return 0;
}
void initializeRandomDouble(double* data, int numElements)
{
// This is a temporary kludge until I implement random complex
// numbers.
ranlib::Uniform<double> rnd;
for (int i=0; i < numElements; ++i)
data[i] = rnd.random();
}
#else // BZ_HAVE_COMPLEX
#include <blitz/blitz.h>
int main()
{
cout << "This benchmark requires <complex> from the ISO/ANSI C++ standard."
<< endl;
return 0;
}
#endif // BZ_HAVE_COMPLEX
|
