[Gems-users] About get pid in ruby (again)

["Daniel Sánchez Pedreño" <sanatox@xxxxxxxxx>]

Dear list,

im actually interested in calculating the acquisiton time of locks and barriers in  Ruby. For that, i've modified my benchmarks with magic instructions  every time a LOCK, UNLOCK or a BARRIER macro is called.

But the problem is the context switch. Often, the initial phase of an acquisition (the busy wait) is done in two differents CPUs and i cant track acquisitions through ruby with only the cpu number where they are executed. The solution would be tracking the pids, but at the moment, i dont know how to do that.

i've read about this in the list. Messages like https://lists.cs.wisc.edu/archive/gems-users/2007-January/msg00010.shtml and 
https://lists.cs.wisc.edu/archive/gems-users/2005-June/msg00014.shtml  talk about get pid from ruby, but it seems to have no solution yet.

Did anybody solve this problem? 

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