Text File

Aucbvax.3175 fa.unix-wizards utzoo!decvax!ucbvax!unix-wizards Wed Sep 16 11:10:03 1981 More on 11/70 Loads, and Swapping on an RK05 >From mike.bmd70@BRL Wed Sep 16 11:03:43 1981 Mike - Yes, we really swap on the RK05. It turns out that having an entire controller dedicated to the swapping helps more than the reletively slow transfer rate of the RKs hurts. EXEC arg lists go out there, and pure text prototypes. We don't do enough real swapping (except for core shuffling) that it hardly makes a difference. 'Tis better than taking up seek time on the moving head disks, which are usually saturated with I/O.

The ROOT is accessed far more frequently on our system than is swap space . I have seen over 200 blocks/sec xfered from the root to user processes, and still had the moving head disks busy. For us, it is a big win.

Put some more memory on your 11/45 with an ENABLE/34, and forget about swapping...

We have put a lot of work into our scheduler. It certainly seems to be much fairer than the Bell Round-Robin approach! Keeps wasted cycles to a minimum, too. Cheers, -Mike

----------------------------------------------------------------- gopher://quux.org/ conversion by John Goerzen <jgoerzen@complete.org> of http://communication.ucsd.edu/A-News/

This Usenet Oldnews Archive article may be copied and distributed freely, provided:

1. There is no money collected for the text(s) of the articles.

2. The following notice remains appended to each copy:

The Usenet Oldnews Archive: Compilation Copyright (C) 1981, 1996 Bruce Jones, Henry Spencer, David Wiseman.