[GitHub] [incubator-mxnet] leezu commented on issue #17045: Relocation truncation issues

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leezu commented on issue #17045: Relocation truncation issues
URL: https://github.com/apache/incubator-mxnet/issues/17045#issuecomment-564420739
 
 
   To solve this, I think we can instruct the compiler to always use 64 bit relocations instead of 32 bit relocations (that may overflow), use `-O2` (or in the extreme case `-Os`) instead of `-O3` to reduce code bloat or use some linker relaxation techniques.
   
   Using `-O2` may be faster than our current `-O3`, as code bloat can slow down the program more than any speed-up from the additional optimizations in `-O3`, but this requires investigation.
   
   > Compiling with -O3 is not a guaranteed way to improve performance, and in fact, in many cases, can slow down a system due to larger binaries and increased memory usage. -O3 is also known to break several packages. Using -O3 is not recommended. However, it also enables -ftree-vectorize so that loops in the code get vectorized and will use AVX YMM registers.
   
   https://wiki.gentoo.org/wiki/GCC_optimization#-O

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