massar@godot.UUCP (J.P. Massar) (12/19/84)
The latest versions of CCA Emacs running on VAXEN with 4.2 seem to have an incredibly obnoxious bug. It was and still is present on CCA's own version on a 780 and our version here at TMC on a 750. Basically, whenever you type faster than Emacs can handle, there is the possibility that when Emacs finally prints out your text, a character or characters may be missing from the screen... They are definitely in the buffer since a C-L fixes the screen to be what you typed. The worst of it is you don't know whether you've made a mistake or Emacs has misplaced a character! My question is: I have never seen anyone outside of CCA/TMC complain about this. Does this happen elsewhere? Secondly, does anyone have the faintest idea what might cause such behavior? It seems to get worse as the load average gets higher. What, indeed, could cause such behavior?!? If I even had a clue I might be willing to look at the code. This behavior, in fact, has happened at least 5 (oops, 6!) times while I've been typing this. The load average on our 750 is 2.00. (E.g., when I typed 'at least 5' I got on the screen 'atleast 5' but when I C-L'ed the screen showed 'at least 5'.) Help! JP Massar ihnp4!godot!massar massar@cca-unix
martillo@mit-athena.ARPA (Joaquim Martillo) (12/26/84)
We have this problem at Project Athena. We have another problem where EMACS is run on a heavily loaded systerm and on type ahead random text from some other part of the buffer or another buffer is put on the screen. This text then goes away and something like the correct text appears.
massar@godot.UUCP (J.P. Massar) (12/27/84)
In article <80@mit-athena.ARPA> martillo@mit-athena.ARPA (Joaquim Martillo) writes: >We have this problem at Project Athena. We have another problem where >EMACS is run on a heavily loaded systerm and on type ahead random text >from some other part of the buffer or another buffer is put on the >screen. This text then goes away and something like the correct text >appears. Yes. That happens at TMC and CCA also. It is almost certainly another symtom of the same bug. It is less annoying once you realize what is going on but quite possibly very devatating on EMACS performance since the screen is being updated needlessly (and wrongly) quite often. No one, however, has yet suggested a cause or a fix... JP Massar ihnp4!godot!massar massar@cca-unix