Re: Robust Futexes status

[Sven-Thorsten Dietrich <sven@mvista.com>]

On Sun, 2005-10-23 at 13:52 -0700, david singleton wrote:
> 	Inaky Perez-Gonzalez   has a wonderful suite of performance, stress and
> functionality tests for the fusyn pthreads mutex package.

> 	The graphs are just to show relative performance for the different 
> flavor kernels.  The
> kernel's perform quite closely regardless of the 'flavor' of kernel.  
> The kernels have quite a few
> debugging options turned so I can look for any problems so performance 
> is not optimal.
> 

The Mutex ownership change seems to climb with waiting threads.

Its hard to tell with the log-n X-axis scale, but does this possibly
correlate to the deadlock-detect option?

If Deadlock-detect is enabled we should be seeing a graph proportional
to n-squared on a linear X axis.

If deadlock detect is disabled, the wait time should plateau for very
large N.

Sven


> 	It appears the robust futex functionality is healthy in all flavors of 
> kernel.
> 
> 	
> 
> David
> 
> 
> 
> 
-- 
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Sven-Thorsten Dietrich
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