jeffv@bisco.kodak.com (Jeff Van Epps) (02/14/91)
It seems to me that Sun has been emphasizing memory mapping as a way to
solve problems lately, so I got to wondering whether certain system calls
had been or could be implemented as accesses in a page of memory which
every process can read but only the kernel can write. So that something
like gettimeofday() would be only a fetch from memory vs. the normal
trap/syscall overhead (and possibly blocking??). I confess to not having
any numbers, so perhaps someone else can tell me that this is a non-issue?
Just a dreamy break from my more mundane Sun questions ;-)
Jeff Van Epps jeffv@bisco.kodak.com
rochester!kodak!bisco!jeffv