[Serusers] Which locking mechanism is useful for usrloc in production environment?

Vaclav Kubart vaclav.kubart at iptel.org
Fri Feb 2 13:21:14 CET 2007


In my case was the throughput decrease with "fast locking" quite
significant (about 20%).

I will do more tests with final Ottendorf (anybody knows when it will be
released?) and publish results on iptel's web.

	Vaclav

On Fri, Feb 02, 2007 at 10:08:21AM +0100, Olaf Bergmann wrote:
> [no crosspost to serdev as I think this is a users' question]
> 
> Vaclav Kubart wrote:
> 
> > it probably highly depends on your OS and kernel. 
> 
> True.
> 
> We had some trouble using posix semaphores on ia32 with a Debian
> linux and kernel 2.6.18, while the very same seemed to work on an
> ia64 architecture (not sure which kernel version, but might have
> been a 2.6.18 as well).
> 
> To me,it seems that the performance penalty from fast locking is
> very small, so this method also qualifies for use in most production
> environments---depending on the size of the user base, of course.
> 
> Regards,
> Olaf



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