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- What are reasons for -march=native to be detrimental
7 There are plenty of reasons why a code can be slower with -march=native, although this is quite exceptional That being said, in your specific context, one possible scenario is the use of slower SIMD instructions, or more precisely different SIMD instructions finally making the program slower
- How to specify -march=native using pragmas (or otherwise) in gcc
How to specify -march=native using pragmas (or otherwise) in gcc Asked 7 years, 9 months ago Modified 5 years, 4 months ago Viewed 4k times
- gcc - Error: bad value for -march= switch - Stack Overflow
Error: bad value for -march= switch Asked 12 years, 6 months ago Modified 9 years, 11 months ago Viewed 8k times
- what is march parameter when compile a c file - Stack Overflow
I saw these two kinds of make parameters: make -march=corei7-avx xxxx xxxx make -march-icelake-server xxxx xxx arch is understood, what's the m meaning? Where can I find which arch can be used
- c++ - equivalent of -march=native for msvc - Stack Overflow
Yes, GCC clang -march=native detects ISA extensions supported by the host system and enables all of them Is also detects what CPU it actually is, and enables -mtune=icelake-client or -mtune=znver4 or whatever which can affect instruction-selection choices and for example -mprefer-vector-width=512 on Zen 4 vs 256 on other AVX-512 CPUs
- gcc - How is -march different from -mtune? - Stack Overflow
-march=foo implies -mtune=foo unless you also specify a different -mtune This is one reason why using -march is better than just enabling options like -mavx without doing anything about tuning Caveat: -march=native on a CPU that GCC doesn't specifically recognize will still enable new instruction sets that GCC can detect, but will leave -mtune=generic Use a new enough GCC that knows about
- sql - How do I use select with date condition? - Stack Overflow
In sqlserver, how do I compare dates? For example: Select * from Users where RegistrationDate >= '1 20 2009' (RegistrationDate is datetime type) Thanks
- -march=haswell vs -march=core-avx2 vs -mavx2 - Stack Overflow
What are the differences and tradeoffs between -march=haswell, -march=core-avx2, and -mavx2 for compiling avx2 intrinsics? I know that -mavx2 is a flag and -march=haswell core-avx2 are architectures which just translate to a bunch of flags So -mavx2 is a subset of the other two But beyond that, how do I choose the right one for my application?
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