Why the default optimization level of f-stack is O0?

[renzibei]

Will there be any bugs if using higher optimization level?

[hailongeric]

I don't meet the error with O2.

[renzibei]

Are you sure that you are setting the optimization level of dpdk library instead of the application code? When I change the optimization level in libs/Makefile, there would be crashes.

[hailongeric]

Sorry, I can't meet any error in running. But I meet many errors in the compiler procedure. I change some compiler's options and some src code. And make it compile successfully.

[renzibei]

I also encounter compiiler errors and need to change the codes when using O2. By the way, did you comment out "FF_INET6=1"? Could you kindly share one fork of the f-stack codes with O2 enabled? Thanks!

[renzibei]

After some changes to the sources of f-stack, currently I can also avoid errors in runtime.

[jfb8856606]

Because release 1.22 and after not stable enough now, may need frequent debugging，so enable -O0 by default. And it's enable -O2 by default in release 1.21(LTS).When the latest version is stable, it will be modified to -O2 by default.

You can comment out this line in lib/Makefile to enable -O2, and hte performance will be greatly improved.
DEBUG=-O0 -gdwarf-2 -g3 -Wno-format-truncation