Re: [Condor-users] KeyBoard Idle Time infinite

[Todd Tannenbaum <tannenba@xxxxxxxxxxx>]

David McBride wrote:
> Todd Tannenbaum wrote:
>
> > Anybody else have solutions?
>
> Greetings,
>
> I've found a way that only requires Condor configuration, at least on our
> Ubuntu-based Linux desktops.  By doing a quick brute-force search of all of the
> /dev nodes on a test X desktop, I discovered that the atime of the /dev/ttyN
> node that is running the X session is updated when keypress / keyrelease events
> occur.
>
> So all I've needed to do is add the first 10 or so of the /dev/ttyN device nodes
> to the CONDOR_DEVICES configuration pragma


Does this really work?  Seems like the /dev/ttyN atime's will only get 
updated when a pseudo terminal is in use.  So if users are typing away 
at shell prompts (in an xterm window or whatever), no problem.  But what 
is a user is just clicking with a mouse for 30 minutes in firebird... 
seems like there would be no pty/tty activity, so I wonder if the atimes 
on any ttyX files would change.  Ditto for if a user was typing up a 
long message in a "pure" X11 window, like a Thunderbird message compose 
window, I wonder if any of the CONSOLE_DEVICES you list below would have 
their atimes change.

With non-USB keyboard, Condor would catch that activity by atime changes 
on /dev/keyboard and /dev/mouse, but atimes do not change with USB 
devices on an unpatched kernel....


 -- which, here, currently looks like
> this:
>
> 	CONSOLE_DEVICES = mouse, console, psaux, input/mice, tty0, tty1, tty2,
> 		tty3, tty4, tty5, tty6, tty7, tty8, tty9
>
> This has proven very effective in practice; we've been running Condor on Ubuntu
> in this way without special kernel patches for a good few months now.
>
> Cheers,
> David
>
>
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--
Todd Tannenbaum                       University of Wisconsin-Madison
Condor Project Research               Department of Computer Sciences
tannenba@xxxxxxxxxxx                  1210 W. Dayton St. Rm #4257
Phone: (608) 263-7132                 Madison, WI 53706-1685