john_r_mudd@stegosaur.cis.ohio-state.edu (03/30/90)
Does anyone have any suggestions on how to time the context switch of C Threads (not kernel threads)? I don't think timing a cthread_yield() call is a good idea, because I'd guess that the primitive is a no-op unless there are other threads available for execution. Currently, I'm measuring the difference between one thread signalling another thread, and the other thread waking up, e.g. thread 1 thread 2 condition_wait(switchsig,lock) t0 = timer() t1 = timer() condition_signal(switchsig) Care is taken to ensure that thread 1 executes the wait before the thread 2 signals. Time to wakeup a thread would equal (t1-t0). Any thoughts/comments/suggestions? ... John .......................................................................... John R. Mudd jrm@cis.ohio-state.edu Department of Computer and Information Science, The Ohio State University 2036 Neil Avenue, Columbus, Ohio, USA 43210-1277