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
|
// =================================================================================================
// This file is part of the CLBlast project. The project is licensed under Apache Version 2.0. This
// project loosely follows the Google C++ styleguide and uses a tab-size of two spaces and a max-
// width of 100 characters per line.
//
// Author(s):
// Cedric Nugteren <www.cedricnugteren.nl>
//
// This file uses the CLTune auto-tuner to tune the xdot OpenCL kernels. Note that the results are
// not verified, since the result is not final and depends on the WGS2 parameter.
//
// =================================================================================================
#include <string>
#include <vector>
#include "utilities/utilities.hpp"
#include "tuning/tuning.hpp"
namespace clblast {
// =================================================================================================
// See comment at top of file for a description of the class
template <typename T, int V>
class TuneXdot {
public:
// The representative kernel and the source code
static std::string KernelFamily() { return "xdot_"+std::to_string(V); }
static std::string KernelName() { return (V==1) ? "Xdot" : "XdotEpilogue"; }
static std::string GetSources() {
return
#include "../src/kernels/common.opencl"
#include "../src/kernels/level1/xdot.opencl"
;
}
// The list of arguments relevant for this routine
static std::vector<std::string> GetOptions() { return {kArgN}; }
// Tests for valid arguments
static void TestValidArguments(const Arguments<T> &) { }
// Sets the default values for the arguments
static size_t DefaultM() { return 1; } // N/A for this kernel
static size_t DefaultN() { return 2*1024*1024; }
static size_t DefaultK() { return 1; } // N/A for this kernel
static double DefaultFraction() { return 1.0; } // N/A for this kernel
static size_t DefaultNumRuns() { return 2; } // run every kernel this many times for averaging
// Describes how to obtain the sizes of the buffers
static size_t GetSizeX(const Arguments<T> &args) { return args.n; }
static size_t GetSizeY(const Arguments<T> &args) { return args.n; }
static size_t GetSizeA(const Arguments<T> &) { return 1; } // N/A for this kernel
static size_t GetSizeB(const Arguments<T> &) { return 1; } // N/A for this kernel
static size_t GetSizeC(const Arguments<T> &) { return 1; } // N/A for this kernel
static size_t GetSizeTemp(const Arguments<T> &args) { return args.n; } // Worst case
// Sets the tuning parameters and their possible values
static void SetParameters(cltune::Tuner &tuner, const size_t id) {
tuner.AddParameter(id, "WGS"+std::to_string(V), {32, 64, 128, 256, 512, 1024});
}
// Sets the constraints and local memory size
static void SetConstraints(cltune::Tuner &, const size_t) { }
static void SetLocalMemorySize(cltune::Tuner &, const size_t, const Arguments<T> &) { }
// Sets the base thread configuration
static std::vector<size_t> GlobalSize(const Arguments<T> &) { return (V==1) ? std::vector<size_t>{2*64} : std::vector<size_t>{1}; }
static std::vector<size_t> GlobalSizeRef(const Arguments<T> &) { return (V==1) ? std::vector<size_t>{2*64*64} : std::vector<size_t>{64}; }
static std::vector<size_t> LocalSize() { return {1}; }
static std::vector<size_t> LocalSizeRef() { return {64}; }
// Transforms the thread configuration based on the parameters
using TransformVector = std::vector<std::vector<std::string>>;
static TransformVector MulLocal() { return (V==1) ? TransformVector{{"WGS1"}} : TransformVector{{"WGS2"}}; }
static TransformVector DivLocal() { return {}; }
static TransformVector MulGlobal() { return (V==1) ? TransformVector{{"WGS1"}} : TransformVector{{"WGS2"}}; }
static TransformVector DivGlobal() { return {}; }
// Sets the kernel's arguments
static void SetArguments(cltune::Tuner &tuner, const Arguments<T> &args,
std::vector<T> &x_vec, std::vector<T> &y_vec,
std::vector<T> &, std::vector<T> &, std::vector<T> &,
std::vector<T> &temp) {
if (V == 1) {
tuner.AddArgumentScalar(static_cast<int>(args.n));
tuner.AddArgumentInput(x_vec);
tuner.AddArgumentScalar(0);
tuner.AddArgumentScalar(1);
tuner.AddArgumentInput(y_vec);
tuner.AddArgumentScalar(0);
tuner.AddArgumentScalar(1);
tuner.AddArgumentInput(temp); // No output checking for the result - size varies
tuner.AddArgumentScalar(static_cast<int>(false));
}
else {
tuner.AddArgumentInput(temp);
tuner.AddArgumentInput(x_vec); // No output checking for the result - store somewhere
tuner.AddArgumentScalar(0);
}
}
// Describes how to compute the performance metrics
static size_t GetMetric(const Arguments<T> &args) {
return (V==1) ? (2*args.n + 1) * GetBytes(args.precision) : 1 * GetBytes(args.precision);
}
static std::string PerformanceUnit() { return (V==1) ? "GB/s" : "N/A"; }
};
// =================================================================================================
} // namespace clblast
// Shortcuts to the clblast namespace
using float2 = clblast::float2;
using double2 = clblast::double2;
// Function to tune a specific variation V (not within the clblast namespace)
template <int V>
void StartVariation(int argc, char *argv[]) {
const auto command_line_args = clblast::RetrieveCommandLineArguments(argc, argv);
switch(clblast::GetPrecision(command_line_args)) {
case clblast::Precision::kHalf: clblast::Tuner<clblast::TuneXdot<half, V>, half>(argc, argv); break;
case clblast::Precision::kSingle: clblast::Tuner<clblast::TuneXdot<float, V>, float>(argc, argv); break;
case clblast::Precision::kDouble: clblast::Tuner<clblast::TuneXdot<double, V>, double>(argc, argv); break;
case clblast::Precision::kComplexSingle: clblast::Tuner<clblast::TuneXdot<float2, V>, float2>(argc, argv); break;
case clblast::Precision::kComplexDouble: clblast::Tuner<clblast::TuneXdot<double2, V>, double2>(argc, argv); break;
}
}
// Main function (not within the clblast namespace)
int main(int argc, char *argv[]) {
StartVariation<1>(argc, argv);
StartVariation<2>(argc, argv);
return 0;
}
// =================================================================================================
|