Hi,
I'm using system studio 2019 beta ultimate on Fedora 27 and Core i7 4790K for BOINC project Citizen Science Grid.
Stock (standard0 software is compiled with g++-7 (probably) with sse3 options. So I'm trying to compile faster software. With "-ipo -xCORE-AVX2 -O3 -fp-model fast=1" option, the application runs faster than the stock one, but accuracy is insufficient. If I changed the options to "-ipo -xCORE-AVX2 -O3 -fp-model precise", the application is slower than the stock, while accuracy is sufficient.
So what should I try next? Now I'm trying "-ipo -xCORE-AVX2 -O3 -fp-model fast=1 -prec-div -prec-sqrt", but I'm not sure the accuracy is good enough and want to know other ways to obtain better accuracy. The result will come out in a few days. It takes many hours to complete one calculation.
Thanks in advance!
-Tetsuji