http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47031
--- Comment #8 from js-gcc at webkeks dot org <js-gcc at webkeks dot org> 2011-01-08 16:14:28 UTC --- Yeah, but Linux is just one of the many OSes supported by GCC. And I don't know of any other OS that uses futexes fors pthread mutexes. > It would still be good to try a worst-case benchmark of spinlocks in the > highly > contended case. I am assuming the performance would be really really bad, but > then I may just be wrong. ;-) As I said: I doubt it, as it's only 10 spins and then the control is given to another thread. Benchmarking Mutexes, Futexes and Spinlocks in the highligh contended case would be interesting. I guess all three are almost equal in this case, but differ a lot in the less contended case.
