mic@sun.soe.clarkson.edu (Mic Lacey) (05/12/89)
How come the HP 340 has a 68030 running at 16.7 mhz and HP claims it is a "4 mip" machine and the new sun 3/80 has a 25 mhz 68030 and they only claim it to be a meger "3 mip" machine?????? -Mic Lacey
usenet@cps3xx.UUCP (Usenet file owner) (05/12/89)
in article <3074@sun.soe.clarkson.edu>, mic@sun.soe.clarkson.edu (Mic Lacey) says: > Keywords: mips, speed, 340, 3/80 > Summary: Speed/Performance Claims > > How come the HP 340 has a 68030 running at 16.7 mhz and HP claims it is a > "4 mip" machine and the new sun 3/80 has a 25 mhz 68030 and they only claim > it to be a meger "3 mip" machine?????? > > -Mic Lacey The Key word is claim. I have tested both machines and found the suns to be faster when both are run under their native windowing system. This is due to the fact that HP's run X11 which is very slow. The difference in claims might be due to the floating point accelerator or the memory cache. BTW... We bought 100 HP 340's. Greg Fell Michigan State University Fell@frith.egr.msu.edu
fkittred@bbn.com (Fletcher Kittredge) (05/12/89)
In article <3074@sun.soe.clarkson.edu> mic@sun.soe.clarkson.edu (Mic Lacey) writes: >How come the HP 340 has a 68030 running at 16.7 mhz and HP claims it is a >"4 mip" machine and the new sun 3/80 has a 25 mhz 68030 and they only claim >it to be a meger "3 mip" machine?????? > > -Mic Lacey Hum... do you know what a MIP is (does anyone?) This question implies that you are not taking the following factors in to account: 1) quality of the system compiler and optimizer 2) efficency of the operating system 3) the rest of the chips the system is using besides the CPU, any caches, co-processors, accelerators, etc. All of these will effect the amount of useful work a system can do in a given amount of time. Sun has a reputation for quoting "mythical" MIPS based on calculations or CPU speed. DEC, HP, and MIPs (the company) are more likely to give more useful figures like MVUPS (microVax II Units Per Second). Remember, this is not PC land where everyone is running the same system software. My personal workstation is a Sun; I use many HPs and DEC things; my strong impression is that as of today (89Q2) the HP compilers have best optimizers. A good optimizer alone could account for the difference in the "MIPS" rating. regards, fletcher Fletcher E. Kittredge fkittred@bbn.com
wunder@hp-ses.SDE.HP.COM (Walter Underwood) (05/16/89)
DEC, HP, and MIPs (the company) are more likely to give more useful figures like MVUPS (microVax II Units Per Second). I believe that VUP is VAX Unit of Processing. If you make the assumption that a VAX-11/780 is a 1 MIPS machine, then 1 VUP = 1 MIPS. Personally, I think that someone should mount a VAX-11/780 on a platinum-iridium block in Paris and define it to be the SI standard for MIPS. wunder