Featured Added Profile Guided Optimizations To Boost PHP 7 Performance

Added Profile Guided Optimizations To Boost PHP 7 Performance

Updated latest Centmin Mod 123.09beta01 with optional support for Profile Guided Optimized PHP 7 only builds which boost PHP performance by between 3-17% for Wordpress, MediaWiki and Drupal like PHP web applications and similar PHP execution patterns. However, due to PGO requiring to compile PHP twice, it will take longer to compile PHP 7. Details outlined here and on Intel's blog here. PGO is one of the performance configuration tips I listed in my guide at Insight Guide - How to boost Centmin Mod LEMP stack performance.

When you recompile/compile PHP 7 via centmin.sh menu option 5 with PHP_PGO='y' set in persistent config file /etc/centminmod/custom_config.inc, the ending text for PHP 7 compile will read.

Code (Text):

***************************************************
* PHP upgraded and auto reinstalled PHP extensions
* PHP_PGO='y' detected. PHP compiled with Profile Guided Optimizations
* https://software.intel.com/en-us/blogs/2015/10/09/pgo-let-it-go-php
***************************************************

The php log would also display at make stage the following

Code (Text):

               ____   _   _  ____       __  __         _      
              |  _ \ | | | ||  _ \  _  |  \/  |  __ _ | | __ ___
              | |_) || |_| || |_) |(_) | |\/| | / _` || |/ // _ \
              |  __/ |  _  ||  __/  _  | |  | || (_| ||   <|  __/
              |_|    |_| |_||_|    (_) |_|  |_| \__,_||_|\_\\___|
                                                               
make -j11 prof-gen
CCACHE_DISABLE=1 make PROF_FLAGS=-fprofile-generate all

PGO PHP 7 training phase for Wordpress, MediaWiki and Drupal like PHP usage loads will auto generate a MySQL database called pgo_train for this training and will have repeated output similar to below during PHP 7 compilation with PHP_PGO='y' set.

Code (Text):

                -=- init Database(s) -=-
Database pgo_train succesfully dropped
Database pgo_train created succesfully
Created tables in pgo_train

                -=- Existing Databases -=-
information_schema
mysql
performance_schema
pgo_train
Content-type: text/html; charset=UTF-8

Hash benchmark module loaded!
MySQL benchmark module loaded!
Date benchmark module loaded!
String benchmark module loaded!
Standard benchmark module loaded!
Class benchmark module loaded!

--------------------------------
-   Benchmark timing results   -
--------------------------------
1.run_hash                 0.055
2.run_hash                 0.055
3.run_hash                 0.055
4.run_hash                 0.055
--------------------------------
1.run_mysql_queries        0.020
2.run_mysql_queries        0.018
3.run_mysql_queries        0.019
4.run_mysql_queries        0.018
--------------------------------
1.run_time                 0.002
2.run_time                 0.002
3.run_time                 0.002
4.run_time                 0.002
--------------------------------
1.run_string               0.012
2.run_string               0.012
3.run_string               0.012
4.run_string               0.012
--------------------------------
1.run_standard             0.016
2.run_standard             0.016
3.run_standard             0.016
4.run_standard             0.016
--------------------------------
1.run_class                0.001
2.run_class                0.001
3.run_class                0.001
4.run_class                0.001
--------------------------------
Total                      0.418

---

 

Also added support to define your own path to your PHP web app's index.php page for PGO training Beta Branch - update inc/php_upgrade.inc add PHPPGO_INDEXPATH variable support in 1… | Centmin Mod Community

 

Examples of how PHP 7 with Profile Guided Optimisation can boost PHP performance with PGO vs non-PGO benchmarks posted at PHP - PHP 7.2.0 GA Stable vs PHP 7.1.12 vs 7.0.26 vs 5.6.32 Benchmarks

 

FYI, Centmin Mod 123.09beta01 was recently updated to only enable PHP_PGO='y' if there's more than 2 cpu threads on server due to extended compilation times for PHP which would be slower with only 1 cpu thread. When 1 cpu thread/core server is detected, Centmin Mod forces PHP_PGO='n' now.

 

Did some comparative LEMP stack PHP-FPM benchmarks which again show slightly better performance for some PHP work loads for PHP 7 with Profile Guided Optimizations enabled

 

Updated 123.09beta01 with PHP 7.3 benchmarks with and without PGO as well as PGO specific training of benchmark script showing up to 25% better performance.

Also added options to add up to 3 additional PGO training variables so you can manually point PHP compile routines to use PGO training for better performance. See Beta Branch - update Profile Guided Optimization (PGO) routine for PHP 7+ in 123.09…