The top of cycle.h into your configure.ac file and #include "config.h" before cycle.h, or define Solaris' gethrtime, you need to paste the autoconf snippet from (In order to use some of the OS-dependent timer routines like In arbitrary units, not seconds or anything like 's intendedįor performance comparisons on a given machine only.) The elapsed time as a double-precision number. Time, and call the elapsed(t1,t2) function to get Ticks t = getticks() function before and after the code you want to FFTW cycle-counter code: cycle.h (ftp: cycle.h).You can download FFTW's cycle-counter header by itself: ![]() If you are interested in using a cycle counter in your own code, (Itanium), x86-64, PowerPC, Alpha, PA-RISC, MIPS, s390, and other We support the cycle counter for x86 (Pentium and later), IA-64 High-precision timer to measure the cost of different code choices,Īnd we now use the hardware cycle counter available in most modernĬPUs. ![]() In order to perform runtime self-optimization, FFTW needs a With that of version 3.x, we continue to distribute it for those users ![]() Section of the FFTW manual for more information.įFTW 2.1.5 is the stable release of FFTW2, last updated in 1999.įFTW 2.1.5 is obsolete, but because its API is incompatible
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