Beta Branch add GCC 9.2+ support to PHP compile routine in 123.09beta01

add GCC 9.2+ support to PHP compile routine in 123.09beta01

- Add optional support for DEVTOOLSETNINE='y' which is only available for private testing right now so setting this in persistent config file /etc/centminmod/custom_config.inc prior to centmin.sh menu option 5 PHP recompiles/upgrades won't utilise GCC 9.2+ right now as you won't have GCC 9.2+ installed by Centmin Mod.
- Centmin Mod 123.09beta01 users won't have that support until SCL yum repo releases GCC 9.2 via devtoolset-9 which is planned for by SCL eventually. For private testing I have built my own GCC 9+ binaries and YUM RPM packages for Centmin Mod and CentOS 7 just to get early compatibility testing so that Centmin Mod 123.09beta01+ and newer have GCC 9 and eventually GCC 10 and Clang 8+ compiler ready support for Nginx and PHP-FPM compilation routines Beta Branch - Testing GCC 8, GCC 9 & Clang 5/6/7 compiler for Centmin Mod Nginx & PHP-FPM

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123.09beta01 branch

• Branch: centminmod/centminmod
• Commit History: centminmod/centminmod

 

Below is php benchmark on Intel Core i7 4790K Haswell dedicated server for PHP 7.4.0RC1 built with both GCC 8.3.1 (default) in CentOS 7 Centmin Mod 123.09beta01 and with optional GCC 9.2.0 support compared with Remi YUM repo's PHP-FPM 7.4.0RC1, 7.3.9, 7.2.22, 7.1.22 and 7.0.33. GCC 9.2 built binaries will have more performance boost in theory with newer cpu models newer than Intel Skylake or AMD Zen2 just as GCC 8 had for newer than Intel Broadwell cpus. As just the Intel Core i7 4790K Haswell older than Intel Broadwell cpu isn't the best example for performance boost that GCC 9 built binaries will have for Centmin Mod Nginx and PHP-FPM performance.

GCC 9.2.0

Code (Text):

gcc -v
Using built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/opt/gcc-9.2.0/libexec/gcc/x86_64-redhat-linux/9/lto-wrapper
Target: x86_64-redhat-linux
Configured with: ../configure --prefix=/opt/gcc-9.2.0 --disable-multilib --enable-bootstrap --enable-plugin --with-gcc-major-version-only --enable-shared --disable-nls --enable-threads=posix --enable-checking=release --with-system-zlib --enable-__cxa_atexit --disable-install-libiberty --disable-libunwind-exceptions --enable-gnu-unique-object --enable-linker-build-id --with-linker-hash-style=gnu --enable-languages=c,c++ --enable-initfini-array --disable-libgcj --enable-gnu-indirect-function --with-tune=generic --build=x86_64-redhat-linux --enable-lto --enable-gold
Thread model: posix
gcc version 9.2.0 (GCC)

GCC 8.3.1

Code (Text):

gcc -v
Using built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/opt/rh/devtoolset-8/root/usr/libexec/gcc/x86_64-redhat-linux/8/lto-wrapper
Target: x86_64-redhat-linux
Configured with: ../configure --enable-bootstrap --enable-languages=c,c++,fortran,lto --prefix=/opt/rh/devtoolset-8/root/usr --mandir=/opt/rh/devtoolset-8/root/usr/share/man --infodir=/opt/rh/devtoolset-8/root/usr/share/info --with-bugurl=http://bugzilla.redhat.com/bugzilla --enable-shared --enable-threads=posix --enable-checking=release --enable-multilib --with-system-zlib --enable-__cxa_atexit --disable-libunwind-exceptions --enable-gnu-unique-object --enable-linker-build-id --with-gcc-major-version-only --with-linker-hash-style=gnu --with-default-libstdcxx-abi=gcc4-compatible --enable-plugin --enable-initfini-array --with-isl=/builddir/build/BUILD/gcc-8.3.1-20190311/obj-x86_64-redhat-linux/isl-install --disable-libmpx --enable-gnu-indirect-function --with-tune=generic --with-arch_32=x86-64 --build=x86_64-redhat-linux
Thread model: posix
gcc version 8.3.1 20190311 (Red Hat 8.3.1-3) (GCC)

Centmin Mod's GCC 9.2.0 built PHP 7.4.0RC1 is slighly faster than GCC 8.3.1 (default) PHP 7.4.0RC1 builds.



Centmin Mod 123.09beta01 already has Nginx supporting GCC 9.2.0 via private GCC 9.2 built RPMs - just waiting on SCL devtoolset-9 GCC 9.2 support. But Centmin Mod's Nginx and PHP-FPM routines are GCC 9.2 ready. Will be working on GCC 10 support soon via custom GCC 10 built RPMs as well

 

That may break system's native GCC version doing your method of install so hope you did it on test server ?

Unfortunately, right Centmin Mod 123.09beta01's GCC 9.2 support is hardcoded to my custom GCC 9.2 RPM build's GCC 9.2 version detection only to ensure I control how GCC 9.2 is installed and setup.

 

You also need to set in persistent config file either PHP_PGO='y' OR GCCINTEL_PHP='y' to ensure PHP is built with it's march target with GCC versions. FYI setting PHP_PGO='y' auto enables GCCINTEL_PHP too.

Haven't tested GCC10 yet fully with Centmin Mod nginx/php-fpm routines yet so I'd advise against it for now.

 

strange indeed.. might need your php_upgrade for inspection PHP-FPM - How to troubleshoot PHP installs/upgrades

 

yeah problem is Promox seems causinges GCC 9.2.1 to not correctly identity cpu used or the cpu used isn't a AMD Ryzen cpu

Code (Text):

gcc -c -Q -march=native --help=target | egrep '\-mtune|\-mprefer-vector-width|\-march|\-msse|\-msse2|\-msse2avx|\-msse3|\-mavx|\-msse4|\-mssse3|\-mpclmul' | tee /root/centminlogs/gcc_php_native.log
  -march=                             k8-sse3
  -mavx                               [disabled]
  -mavx2                              [disabled]
  -mavx256-split-unaligned-load     [disabled]
  -mavx256-split-unaligned-store     [disabled]
  -mavx5124fmaps                      [disabled]
  -mavx5124vnniw                      [disabled]
  -mavx512bitalg                      [disabled]
  -mavx512bw                          [disabled]
  -mavx512cd                          [disabled]
  -mavx512dq                          [disabled]
  -mavx512er                          [disabled]
  -mavx512f                           [disabled]
  -mavx512ifma                        [disabled]
  -mavx512pf                          [disabled]
  -mavx512vbmi                        [disabled]
  -mavx512vbmi2                       [disabled]
  -mavx512vl                          [disabled]
  -mavx512vnni                        [disabled]
  -mavx512vpopcntdq                   [disabled]
  -mpclmul                            [disabled]
  -mprefer-vector-width=              none
  -msse                               [enabled]
  -msse2                              [enabled]
  -msse2avx                           [disabled]
  -msse3                              [enabled]
  -msse4                              [disabled]
  -msse4.1                            [disabled]
  -msse4.2                            [disabled]
  -msse4a                             [disabled]
  -msse5                            
  -msseregparm                        [disabled]
  -mssse3                             [disabled]
  -mtune-ctrl=                      
  -mtune=                             k8

 

centminmod-gcc is provided as is on github without any support as it mainly written for my usage. But yes seems the download mirror for GCC 9 is empty now for at http://www.netgull.com/gcc/snapshots/LATEST-9/ hmmm. There's other GCC 9 mirrors though GCC mirror sites - GNU Project - Free Software Foundation (FSF). But not all mirrros are up to date.

 

some apps (not centmin mod related) I build with GCC 9.2 custom built RPMs had errors.

 

use - mysql isn't valid in CentOS 7

Code (Text):

service mysqld restart

Code (Text):

mysqlrestart

or

Code (Text):

systemctl restart mariadb

if nginx or php-fpm binary gets built and works it should be fine as compilations aren't usually clean of all errors/warnings

 

they wouldn't have anything to do with each other. To confirm I suggest you test a new test VPS from fresh centmin mod install first then try GCC 9 again as you may have messed up the existing VPS with your GCC 9 install tests previously. Again GCC 9 install of mine is provided as is without support for my personal use right now.