Greatest Software Ever Written 4254

i have numerous examples similar to that now ...

earliest record that i have to hartmann and cms pipes is in 87 ... 6-7 years after the posted rex example.

earliest customer reference is end of 88 ... from vmshare archives:

leading up to that, john had done other things like toy ... contribution for John's 50th b'day

the above contains abstract of talk John gave at a conference I held mar82.

John's 50th b'day web pages

a few other posts mentioning john

old email from john

To: wheeler

Hi, Lynn. Howi is life in sunny California? I have bben studying the SEPP scheduler a bit to figure out how the various things are computed etc. Rich Kogut said that no-one can understand all of it (maybe except for you) and I tend to agree with him. If you can, please explain about

1. Around statement 301600 the guy who gets compute bound is inserted in the runlist based on a recomputed priority, but VMEPRIOR is re-set to the original priority after he has been inserted. Why does the priority not correspond to where he is in the list? It must screw up the addlist routine.

2. The working set calculation is based on the calculation of max resident pages * max+1 (which is pages squared) which is subtracted from the sum of resident pages at read plus the currently resident pages (I cant decide what the unit of this is: pages times page reads, I think). This is like comparing apples and pears (isnt it). What is the reasoning behind this. Around line 713100.

3. Calculating the delay based on the external user priority certainly keeps the high speed multiply on a 168 busy, but why was it not made as a table look-up? Lines 740100.

Thanks a lot. John Hartmann 17JUL78 17:36 CET.