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How comes GCC with "-mtune=nocona" produces the fastest code? (for Zen3 CPU)
I understand that different "-mtune" options cause the compiler to make different decisions in the code optimization. But the "-mtune" option that matches the actual CPU model is supposed to generated the fastest code. That is the whole idea of making CPU-model-specific optimizations, right? In...- La Mancha
- Post #7
- Forum: C Programming
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How comes GCC with "-mtune=nocona" produces the fastest code? (for Zen3 CPU)
:thinking:- La Mancha
- Post #2
- Forum: C Programming
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How comes GCC with "-mtune=nocona" produces the fastest code? (for Zen3 CPU)
Hello, I have a program that is written in C and that is compiled with GCC on Linux, BSD and Solaris. I want the binary to run on all "x64" processors, so I use -march=x86_64 option. Also I was experimenting with different -mtune options. My machine is AMD Ryzen 9 5950X, so I would think that...- La Mancha
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- Replies: 9
- Forum: C Programming