Messages in this thread | | | Subject | Re: Robust Futexes status | From | Sven-Thorsten Dietrich <> | Date | Sun, 23 Oct 2005 20:48:00 -0700 |
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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 > > > > -- *********************************** Sven-Thorsten Dietrich Real-Time Software Architect MontaVista Software, Inc. 1237 East Arques Ave. Sunnyvale, CA 94085
Phone: 408.992.4515 Fax: 408.328.9204
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