A little CPU stresser tool
reex uses CPU's SSE, SSE2, and AVX SIMD extensions set to calculate floating point numbers. Depending on your CPU, if it supports these three SIMD extensions, you can try it out!
SSE support: Pentium III
SSE2 support: Pentium D
AVX support: Sandy Bridge see here
SSE support: Athlon XP and Duron
SSE2 support: Athlon 64 and Opteron
AVX support: Bulldozer see here
Note: AVX support isn't mandatory and if your CPU doesn't support it, remove -DAVX_ENABLE and -mavx from the makefile and recompile the program.
Note 2: Default floatings points are different for each operation. And the time between those operations isn't exactly correct, clock_gettime may give a different result on a different version of the Linux kernel. The time between calling clock_gettime from userspace, is also not calculated. Don't take them as "last values", they're most likely approx values.