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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