Andy Wingo <wi...@pobox.com> skribis: > Namely, ports can have associated recursive mutexes. They can be in a > mode in which every operation on a port grabs the mutex. The interface > to set a port into unlocked mode (à la fsetlocking) is unimplemented, > but the machinery is there. > > This change fixed the crashes I was seeing, but it slows down port > operations. For an intel chip from a couple years ago the slowdown was > something on the order of 3x, for a tight putchar() loop; for Loongson > it could be as bad as 26x. Mark was unhappy with this.
Thanks for bringing up the issue. I’d like to hear what Mark thinks. :-) Ludo’.
