Displaying 3 results from an estimated 3 matches for "fftx_dswp".
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fft_dswp
2012 Jun 07
2
[LLVMdev] no differnce in the execution time between seq. and parallel programs
...transformation
Fft_dswp.c The second program after the transformation
In gcc compiler I used the following steps
--Before the transformation
gcc –Wall fft_x.c –o samp -lm
Time ./samp
0.544 the execution time before transformation
--After the transformation
Gcc –Wall fftx_dswp.c –o samp -lm -lpthread
Time ./samp
0.319 the execution time after transformation
-------------------------------------------------------
Then I repeat the same Pervious steps with the llvm
In llvm compiler I used the following steps
--Before the transformation
Llvm-gcc -...
2012 Jun 06
0
[LLVMdev] no differnce in the execution time between seq. and parallel programs
> I would be happy if you give me an insight into what could have caused the
> difference.
No idea. Maybe you forgot to turn optimizations on when compiling? Otherwise
you are going to have to send in your programs along with an explanation of how
you compiled them exactly (exact sequence of commands) both for gcc and LLVM.
Ciao, Duncan.
2012 Jun 06
2
[LLVMdev] no differnce in the execution time between seq. and parallel programs
Duncan Sands <baldrick <at> free.fr> writes:
>
> Hi esraa,
>
> > i am using LLVM to execute two programs both of them was exactly
> > similar but the difference was the first one is a sequential program
> > has three functions. In the second program i am trying to execute it
> > by giving each function to thread (three thread work in parallel way)