regarding issues with futexes and multiple threads

[Chagin Dmitry]

On Thu, Mar 03, 2011 at 09:20:51PM +0000, Alexander Best wrote:
> hi there,
> 
> i've been investigating this issue for quite a while now and simply wanted to
> post some measurements i did.
> 
> basically there's a massive slowdown when a process triggers a lot of threads
> which are doing futex operations. the following example is from darren hart's
> futex test suite (performance/). the slowdown seems to SMP related. here are
> the measurements running with SMP enabled and with kern.smp.disabled=1:
> 

1) slowdown is expected behaviour.
2) is it possible to run this test suite on FreeBSD?

--
chd,
Have fun!

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