David CARLIER <devne...@gmail.com> writes: > Hi here a little update proposal for ARM architecture.
This sort of thing is not a "little proposal" where you can just send in an unsupported patch and expect it to be accepted. You need to provide some evidence that (a) it actually does anything useful and (b) it isn't a net loss on some ARM architectures. For comparison's sake, see https://www.postgresql.org/message-id/flat/CAB10pyamDkTFWU_BVGeEVmkc8%3DEhgCjr6QBk02SCdJtKpHkdFw%40mail.gmail.com where we still haven't pulled the trigger despite a great deal more than zero testing. FWIW, some casual googling suggests that ARM "yield" is not all that much like x86 "pause": it supposedly encourages the system to swap control away from the thread altogether, exactly what we *don't* want in a spinloop. So I'm a little doubtful whether there's a case to be made for this at all. But for sure, you haven't tried to make a case. regards, tom lane
