Speed up ZingMe-NTVV2 with PHP extension module

18/12/2010

By Nguyen Trung ThanhZingMe Team leader

Web Technical - VNG

Contents

Introduction

Why?

PHP extension basic

SWIG

Sample

INTRODUCTION - ntvv2

Introduction

• Ntvv2 (http://me.zing.vn/apps/ntvv2)– 1.M daily active user– Average 800 rps (per webserver) max 1100

rps– 9300 rps (all database servers)– 3 webservers

• Use Membase for cache and storage• Use other db for secondary storage• All bussiness function is moved to PHP

extension

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Why to write PHP module?

Make complicated Bussiness functions run faster, consume less memory

PHP high-level overhead cpu/mem

Advance facility with PHP-FPM

Cache something in PHP process

PHP extension basic

What is an extension?

Lifecycle

Setting up a build environmenthttp://devzone.zend.com/article/4486

http://devzone.zend.com/article/1021-Extension-Writing-Part-I-Introduction-to-PHP-and-Zend

What is an extension?

Have you ever used PHP extension?

PHP consist of many extensions

All function we used is from extensions

Lifecycle

Setting up build environment

- Setup PHP-devel

- Sample extension

Is it complicated?

●Is there any sexier and easier way?●We can use SWIG

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SWIGSWIG is an interface compiler that connects

programs written in C and C++ with scripting languages such as PHP, Python, Ruby...

How SWIG works

Using SWIG

Install module to PHP extensions

Sample

How SWIG works

What does SWIG do for you ?

Namespace

Constants

Type conversion

For simple types (int, float, char *, enum)

Wraps complex types

Pointers to structs and classes

Exposes functions

Using SWIG

Defile module in swig file

Generate source code

Create module project, build it

Define module

Data type

Wrapper class/functions

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%module ntvv2module%{#include <string>#include <vector>#include <list>#include <string>#include “ntvvgame.h"%}struct LandInfo{ int id; std::string data;} ;LandInfo updateLandInfo(int uid, int landID);

%include "std_map.i"%include "std_vector.i"%include "std_string.i"%include "std_pair.i"

Exposure

•Swig recognizes C/C++ declarations

'struct' or 'class'

functions

•Hiding elements

%ignore solver::noupdate;

%include “satsolver/solver.h”

Useful commands•Renaming

%rename("to_s") asString();

%rename( "name=" ) set_name( const char *name );

%rename("empty?") empty();

•Aliasing

%alias get "[]";

•Constants

%constant int Script = C_CONSTANT;

•Defines

%define YUILogComponent "bindings"

%enddef

%define %macro(PARAMETER)

SWIG steps

Generate code

Create project, compiling– Add genterated code to project

Running– Add extension module to PHP

Sample

Cache data in PHP module

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Q&A