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Added benchmark for kernel launch

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This commit is contained in:
Philippe Tillet
2015-01-19 08:47:18 -05:00
parent ad05dea33f
commit 225c7aac8f
1 changed files with 24 additions and 13 deletions
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37
bench/overhead.cpp
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@@ -9,19 +9,30 @@ int main()
{ {
ad::array x(10, ad::FLOAT_TYPE), y(10, ad::FLOAT_TYPE), z(10, ad::FLOAT_TYPE); ad::array x(10, ad::FLOAT_TYPE), y(10, ad::FLOAT_TYPE), z(10, ad::FLOAT_TYPE);
ad::tools::timer t; ad::tools::timer t;
std::cout << "-------------------------" << std::endl; // std::cout << "-------------------------" << std::endl;
std::cout << "Expression tree creation:" << std::endl; // std::cout << "Expression tree creation:" << std::endl;
#define BENCH(CREATE, STR) \ //#define BENCH(CREATE, STR) \
{\ // {\
std::vector<int> flusher(10000000, 1);\ // ad::array_expression tmp1(CREATE);\
t.start();\ // t.start();\
ad::array_expression tmp(CREATE);\ // for(unsigned int i = 0 ; i < 1000 ; ++i)\
std::cout << STR << ": " << t.get() << std::endl;\ // ad::array_expression tmp2(CREATE);\
} // std::cout << STR << ": " << t.get()/1000 << std::endl;\
// }
BENCH(x + y, "2 terms"); // BENCH(x + y, "2 terms");
BENCH(x + y + x, "3 terms"); // BENCH(x + y + x, "3 terms");
BENCH(x + y + x + y, "4 terms"); // BENCH(x + y + x + y, "4 terms");
BENCH(x + y + x + y + x, "5 terms"); // BENCH(x + y + x + y + x, "5 terms");
//#undef BENCH
std::cout << "-------------------------" << std::endl; std::cout << "-------------------------" << std::endl;
x = y + z;
ad::cl::synchronize(x.context());
t.start();\
for(unsigned int i = 0 ; i < 100 ; ++i){
x = y + z;
ad::cl::synchronize(x.context());
}
std::cout << "Kernel launch overhead: " << t.get()/100 << std::endl;
} }