Ways to Improve Performance

Improving Shared Library Start-Up Time with fastbind

Invoking fastbind from the Linker

To invoke fastbind from ld, pass the request to the linker from your compiler by using the -Wl,+fboptions. For example:

$ ld -b convert.o volume.o -o libunits.sl $ cc -Aa -Wl,+fb main.c -o main \

libunits.sl -lc

Build the shared library. Link main to the shared library. Perform fastbind.

The linker performs fastbind after it creates the executable file.

How to Tell if fastbind Information is Current

By default, when the dynamic loader finds that fastbind information is out-of-date, it silently reverts back to the standard method for binding symbols. To find out if an executable file has out-of-date fastbind information, set the _HP_DLDOPTS environment variable as follows:

$ export _HP_DLDOPTS=-fbverbose $ main

/usr/lib/dld.sl: Fastbind data is out of date

The dynamic loader provides a warning when the fastbind information is out-of-date.

Removing fastbind Information from a File

To remove fastbind information from a file, use the fastbind tool with the -noption. For example:

$ fastbind -n main

Remove fastbind information from main.

Turning off fastbind at Run Time

To use the standard search method for binding symbols, instead of the fastbind information in an executable file, set the _HP_DLDOPTS environment variable as follows:

export _HP_DLDOPTS=-nofastbind

Turns off fastbind at run time.

For More Information:

See the fastbind(1) man page.

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Kenwood HP 9000 manual Invoking fastbind from the Linker, How to Tell if fastbind Information is Current, 294

HP 9000 specifications

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