Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP
Path: utzoo!mnetor!seismo!rutgers!ames!ucbcad!ucbvax!jhunix.BITNET!ins_ajbh
From: ins_ajbh@jhunix.BITNET (James B Houser)
Newsgroups: mod.computers.vax
Subject: VAX Instruction Timing
Message-ID: <8701090448.AA22342@ucbvax.Berkeley.EDU>
Date: Thu, 8-Jan-87 17:16:15 EST
Article-I.D.: ucbvax.8701090448.AA22342
Posted: Thu Jan  8 17:16:15 1987
Date-Received: Fri, 9-Jan-87 02:47:43 EST
Sender: daemon@ucbvax.BERKELEY.EDU
Organization: The ARPA Internet
Lines: 9
Approved: info-vax@sri-kl.arpa


How do you go about getting instruction time numbers for VAXEN. Things
like how long a register to register move takes etc. The local DEC
people have no idea and the documentation (sic) is not helpful. I am
particularly looking for 785 specs but others would be good too.
I did some informal timing tests and some of the results do not make a lot
of sense. How are you supposed to write really fast code without
these numbers? Also, how much do the values change for different versions
of the microcode?