profile system API performance

[Nick Clifton]

Hi George,

> Actually, I have read through the web site (http://www.gnu.org/software/libc) 
> for major items before asking this question, but there are no document for how 
> to rebuild a libc and no related mail list. Have you found them from the web 
> site?

Sure.  Did you see glibc manual ?  Specifically:

http://www.gnu.org/software/libc/manual/html_node/Configuring-and-compiling.html#Configuring-and-compiling

and

http://www.gnu.org/software/libc/manual/html_node/Running-make-install.html#Running-make-install

> My challenge is, I need to profile application on various Linux machines, and
> for some Linux machine, I do not know the distribution name and I only know 
> the architecture, for example, x86-32, Power PC, etc. Any ideas of which 
> glibc-profile should I try?

Running "rpm -q glibc" should tell you which version of glibc is 
installed on any particular machine.  If that version of linux uses the 
rpm package manager.  I am sure that there are equivalent commands for 
other package managers, but this is getting way off topic.  This is a 
binutils mailing list not a linux questions mailing list.

> Why the glibc-profile are vendor dependent?

They may not be.  Some vendors may use stock versions of glibc.  Others 
may apply their own set of patches to a particular glibc release, making 
their own version.

Cheers
   Nick