On Mon, 2013-10-07 at 13:15 -0700, Adrian Chadd wrote: > Hi, > > You should add: > > *[snip] > * a DELAY(1) or something. >
Why? Why oh why do people write while (!read_some_status_register()) DELAY(n); when DELAY() is implemented as, roughly: while (read_some_counter_register() < something) continue; The whole point of DELAY() is to busy-wait. What might be nice is some function that we can call in such a loop such as cpu_busywait(), so that when running in an emulated or virtualized environment the emulator or hypervisor could use that as a hint to do something smart. -- Ian _______________________________________________ freebsd-current@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-current To unsubscribe, send any mail to "freebsd-current-unsubscr...@freebsd.org"