Ways to Improve Performance

Improving Shared Library Start-Up Time with fastbind

Improving Shared Library Start-Up Time with fastbind

The fastbind tool improves the start-up time of programs that use shared libraries. When fastbind is invoked, it caches relocation information inside the executable file. The next time the executable file runs, the dynamic loader uses this cached information to bind the executable instead of searching for symbols.

The syntax for fastbind is:

fastbind [ -n] [ -u]incomplete executable

where:

 

-n

Removes fastbind data from the executable.

-u

Performs fastbind even when unresolved symbols are

 

found. (By default, fastbind stops when it cannot

 

resolve symbols.)

Using fastbind

You can create and delete fastbind information for an executable file after it has been linked with shared libraries. You can invoke fastbind from the linker or use the fastbind tool directly. You can set the _HP_DLDOPTS environment variable to find out if fastbind information is out-of-date and to turn off fastbind at run time.

Invoking the fastbind Tool

To invoke fastbind on an incomplete executable file, verify that your executable has write access (because fastbind writes to the file) and then run fastbind.

$ ls -l main

 

 

-rwxrwxrwx

1 janet

191

28722 Feb 20 09:11 main

$ fastbind

main

 

 

The fastbind tool generates fastbind information for main and rewrites main to contain this information.

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Kenwood HP 9000 manual Improving Shared Library Start-Up Time with fastbind, Using fastbind, Invoking the fastbind Tool

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