> Actually, I believe they do. Take the cycle time (which I believe they do > publish somewhere) and invert, and voila. I seem to recall from some > comments that Barton Robinson made many months ago that the first generation > zSeries boxes were 200Mhz machines (5ns cycle time). I'm sure someone who > knows for sure can confirm or refute that.
IBM does publish cycle times in some of their "in depth" discussion of zSeries processor designs. However, there are so many other factors involved in zSeries performance that these are almost an aside in the discussion of the design. I have a list of cycle times for the last twenty or so mainframes announced including Amdahl and Hitachi products - I've never felt it worthwhile to publish them because they don't really add a great deal to our knowledge and they distract from the real factors. -- Phil Payne http://www.isham-research.com +44 7785 302 803
