Beta Branch update MARCH_TARGETNATIVE check for cloud vps providers in 123.09beta01

update MARCH_TARGETNATIVE check for cloud vps providers in 123.09beta01

- Disable march=native compiler option when certain VPS providers are detected. This is for smarter detection of cloud vps providers who run a mix of different cpu models to prevent issues when you switch host nodes via snapshot backup restores or whole vps migrations due to differing cpu models causing seg faults for nginx and php-fpm and can only be fixed after you recompile nginx and php-fpm after the move. This update fixes the issues so you don't need to recompile nginx and php-fpm after the move as not all Centmin Mod users would be aware of the solution for the seg faults caused by nginx and php-fpm being compiled on one cpu model having issues after a move to another vps host node which has a different cpu model.
- Can disable override this smarter detection routine to force march=native compiler for nginx and php-fpm if you want more performance and are aware of the need to recompile nginx and php-fpm after vps host node moves. You can force march=native and disable override this smarter update by setting in persistent config file /etc/centminmod/custom_config.inc the following variable, MARCH_TARGETNATIVE_ALWAYS='y' prior to nginx and php-fpm recompiles or prior to initial centmin mod installs.

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123.09beta01 branch

• Branch: https://github.com/centminmod/centminmod/tree/123.09beta01
• Commit History: https://github.com/centminmod/centminmod/commits/123.09beta01

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Tested this on Upcloud with Intel Xeon Gold 6148 cpus as Upcloud is one of those VPS hosts detected by Centmin Mod that disables march=native if Upcloud, Linode, DigitaOcean, Vultr are detected. With MARCH_TARGETNATIVE_ALWAYS='y' set to force march=native for Nginx compiles with GCC 8.3.1 on CentOS 7 and seems like for Centmin Mod Nginx HTTPS performance improves around 25% while non-HTTPS doesn't improve at all. With MARCH_TARGETNATIVE_ALWAYS='y' set on these VPS providers, you have to recompile Nginx and PHP-FPM and Memcached via centmin.sh menu options 4, 5 and 10 respectively if you move your VPS onto a different VPS host node which has different cpu models though.

 

You don't want to set MARCH_TARGETNATIVE_ALWAYS='y' on DigitalOcean, Vulr or Upcloud unless you are fully aware if your VPS moves to a different server or cpu within these VPS providers, you have to recompile nginx, php and memcached after the move if you have set MARCH_TARGETNATIVE_ALWAYS='y' yourself.

 

1st one is default set to yes already on dedicated server and 2nd variable isn't needed for dedicated servers only for vps on linode/digitalocean/upcloud/vultr