Messages in this thread |  | | | From | david singleton <> | | Subject | Re: Robust Futexes status | | Date | Mon, 24 Oct 2005 10:02:11 -0700 |
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On Oct 23, 2005, at 8:48 PM, Sven-Thorsten Dietrich wrote:
> 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?
It could be. I have been running all the tests mainly as stress and functionality tests. > > 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.
The original run script ran up to 7500 waiting threads. I ran a version that only went up to 400 threads.
When I get full performance data I'll post it.
David > > 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 > > http://www.mvista.com > Platform To Innovate > *********************************** >
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