Difference between revisions of "Performance/Reorder Symbols For Libraries"
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This chapter describes the solution for the Windows platform. | This chapter describes the solution for the Windows platform. | ||
| − | == Microsoft Visual Studio 2008 == | + | === Microsoft Visual Studio 2008 === |
OpenOffice.org uses the Microsoft Visual Studio 2008 C/C++ compiler suite for the Windows build, called wntmsci12[.pro]. What options are available to support us reordering code/data in libraries? If you start the C/C++ compiler and linker with the help option you can see all supported options. The following section shows the options which can help us. | OpenOffice.org uses the Microsoft Visual Studio 2008 C/C++ compiler suite for the Windows build, called wntmsci12[.pro]. What options are available to support us reordering code/data in libraries? If you start the C/C++ compiler and linker with the help option you can see all supported options. The following section shows the options which can help us. | ||
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| + | === Determine what functions are called during start up === | ||
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| + | === How to create an ORDER file that is accepted by the linker === | ||
Revision as of 21:10, 21 March 2009
Contents
Reorder code/data for libraries to improve file I/O
The comprehensive analysis of the cold start up behavior of OpenOffice.org shows that file I/O is main bottleneck. About 80% of the start up time is spent waiting for data from the disk. Most file I/O depends on library loading. This part describes what can be done to reduce I/O time for loading OpenOffice.org libraries. The main ideas are system independent but the solutions must be system/compiler specific. The following chapters describe in detail how we want to reorder code/data within the libraries.
Windows
This chapter describes the solution for the Windows platform.
Microsoft Visual Studio 2008
OpenOffice.org uses the Microsoft Visual Studio 2008 C/C++ compiler suite for the Windows build, called wntmsci12[.pro]. What options are available to support us reordering code/data in libraries? If you start the C/C++ compiler and linker with the help option you can see all supported options. The following section shows the options which can help us.
Microsoft (R) 32-Bit C/C++-Optimizing Compiler Version 15.00.30729.01 for 80x86
Copyright (C) Microsoft Corporation. All rights reserved.
...
/Gh Enable _penter Hook Function
/GH Enable _pexit Hook Function
/Gy Enable Function-Level Linking
...
Microsoft (R) Incremental Linker Version 9.00.30729.01
Copyright (C) Microsoft Corporation. All rights reserved.
Syntax: LINK [Options] [Files] [@Commandfile]
Options:
...
/ORDER:@Filename
...
