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From Justin Erenkrantz <jerenkra...@ebuilt.com>
Subject Solaris 8 and 9 thread libraries was Re: [proposal] apr_thread_setconcurrency()
Date Sun, 16 Sep 2001 23:36:40 GMT
On Sun, Sep 16, 2001 at 04:12:58PM -0700, Justin Erenkrantz wrote:
> Yup.   More precisely /usr/lib/lwp/libthread.so is the "alternate"
> version and /usr/lib/libthread.so is the "default" version.  They
> are binary compatible (as far as we care) - therefore the
> LD_LIBRARY_PATH trick works.  With Solaris 8 (first one to have
> this alternate version), the default is to use LWPs and the 
> alternate is bound threads.  AFAIK, Solaris 9 switches them.

% uname -srvm
SunOS 5.9 Beta sun4u
% ls -l /usr/lib/lwp/libthread.so.1 /usr/lib/libthread.so.1
-rwxr-xr-x   1 root     bin       129168 Jun 20 10:40 /usr/lib/libthread.so.1
lrwxrwxrwx   1 root     root          17 Aug 29 16:41 /usr/lib/lwp/libthread.so.1 -> ../libthread.so.1

% uname -srvm
SunOS 5.8 Generic_108529-09 i86pc
jerenkrantz@boris% ls -l /usr/lib/lwp/libthread.so.1 /usr/lib/libthread.so.1
-rwxr-xr-x   1 root     bin       170724 Jan 24  2001 /usr/lib/libthread.so.1
-rwxr-xr-x   1 root     bin       108620 Feb 22  2001 /usr/lib/lwp/libthread.so.1

As you can see, the alternate threading library on Solaris 9 just points
to /usr/lib/libthread.so.1.  Based on what I can see, LWPs are still 
present, but the performance characteristics and functions executed 
*looks* like it is a bound thread implementation.  I don't have access 
to the source code, so I have no clue what is going on.  -- justin


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