Hi, during optimization of my code I found that even simple C++ std::complex operations are not vectorized. See following code ///////////////////////////////////// #ifdef USE_CPP #include typedef std::complex cmplx16; #else #include typedef complex double cmplx16; #endif // USE_CPP #define simd_for _Pragma ("simd") for void sum(int Nx, int Ny, int Nz, cmplx16 A[Nx][Ny][Nz], cmplx16 B[Nx][Ny][Nz], cmplx16 C[Nx][Ny][Nz]) { __assume_aligned(A,32); __assume_aligned(B,32); __assume_aligned(C,32); for(int x=0; x C[x][y][z] = A[x][y][z] + B[x][y][z]; } } } }
Intel® Cilk™ Plus
Compiling Cilk plus on Ubuntu 12.04 using gcc 4.7
Hi,
I am having trouble building Cilk plus (cilkplus-rtl-001857.tgz) on Ubuntu 12.04. The version of gcc and the error are below:
$ gcc --version
gcc (Ubuntu/Linaro 4.7.0-7ubuntu3) 4.7.0
Copyright (C) 2012 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
Error:
cilk stack
Hi I am trying to understand how the stack in cilk are managed, reading the ABI doc and the code did not help me too much.
Database connection pooling library using cilk plus
Hi, I am querying the database for a like 10000 tables ( the database is quite big ) and as of now my code for querying the database is serial. To speed up the process I intend to openup multiple connections to the database and query database i.e. embed some parallelism in the cilk code for my project. I cannot think of a way to implement this in cilk plus I thought of doing it in the following manner( but I don't know anything that would help me):
Two compiler crashes
The following tests cause compiler crashes, although they should be incorrect uses of _Cilk_spwan. (The spec seemly does not exclude the first test).
icc version 12.1.4 (gcc version 4.6.0 compatibility) (1) // a.cpp int foo(int i) { return i; } int a = _Cilk_spawn foo(0); int main() { return a; } Error message: (0): internal error: backend signals compilation aborted for a.cpp (code 4) (2) // Found by my colleague Ben Langmuir // b.cpp int main() { _Cilk_spawn 0; return 0; } Error Message:
Problem with reducers and array notation (__sec_reduce_min)
Hi, I tried to create an example finding the minimum of values in an array using the __sec_reduce_min()-reducer. However, i got various error messages that i believe point out some bugs. I used the latest version of the cilk-branch (downloaded today, 21:00 EST) only with the flags -lcilkrts and -fcilkplus. I am running a Fedora 16 x86-64.
using namespace std;
int main(int argc, char** argv) {
double* A = new double[5];
for (int i = 0; i < 5; i++) A[i] = i;
__sec_reduce_min(A[0:5]);
return 0;
}Implicit cilk_sync before try-block does not seem to work
Hi, i wanted to implement an example from the Cilk Plus User Guide: Page 37, Exception Handling, where they show, how the implicit sync in front of a try-block could limit the parallelism of the program. My code is as follows:
void mysleep(int a) {
sleep(a);
}
int main(int argc, char ** argv) {
cilk_spawn mysleep(5);
try {
cilk_spawn mysleep(5);
mysleep(5);
}
catch(int err) {
}
}
wierd behaviour of cilk_for keyword
I am writting code in C90 and using cilkplus. I use a library which define TRY, CATCH macros to simulate the try catch behaviour similar to C++. Now the following piece of code compiles and runs as expected:
int j ;
for ( j=0; j<some_constant; ++j)
{
TRY {
//some code which throws exception
} CATCH(SQLException) {
//some action.
}
END_TRY;
}
but when the same code is run wth cilk_for keword, I get compile error
The code:
VS2010 installation problem
Hello,I have recently installed VS2010 and Intel Parallel Studio XE. I have been trying to use the ArrayNotation example from the Intel website.I am unable to resolve the following error: "ERROR: identifier __assume_aligned is undefined"I'm sure there is something basic I need to due, but I have been unable to sort it out.Additionally, the array notation in the code is showing up as red underline as if it isn't recognized syntax - How can I resolve this.Any help would be greatly apprciated, I have been pulling my hair out.Regards,Brad
writing a program with cilk
Hello all
I want to move from tests with cilk to an actual program .I would like from someone who has worked in a program with cilk just to explain the procedure( steps ) to follow in order to end up with a cilk program.
What i want to say is in what phase of my program should i import cilk.Should i finish it first as a serial program see that everything is working as expected or should import cilk before the serial program is ready.
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