Dear all,
when I configure fftw 3.3.10 using:
C=ifx F77=ifx CC=gcc CFLAGS="-O3 -march=native -mavx2" FCFLAGS="-O3 -xAVX2"\
./configure --prefix=/usr/local/ --enable-shared --enable-mpi
--enable-openmp --enable-threads --enable-avx --enable-avx2
I get a warning from configure:
checking whether a cycle counter is available... no
***************************************************************
WARNING: No cycle counter found. FFTW will use ESTIMATE mode
for all plans. See the manual for more information.
***************************************************************
I am using gcc 14.2, ifx 2025.0 on opensuse leap 15.6
I am not sure if I had this in older versions of gcc / ifort.
My question: Is the estimate mode a performance problem or can I just
neglect the warning?
Best regards,
Michael
--
Dr. Michael Fechtelkord
Institut für Geologie, Mineralogie und Geophysik
Ruhr-Universität Bochum
Universitätsstr. 150
D-44780 Bochum
Phone: +49 (234) 32-24380
Fax: +49 (234) 32-04380
Email:[email protected]
Web Page:https://www.ruhr-uni-bochum.de/kristallographie/kc/mitarbeiter/fechtelkord/
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