[ale] Putting an arbitrary process to sleep

[James Kinney]

That's a good idea. There is a board that is software only for clock
speed. I can't remember the maker, but it is nicknamed "the overclockers
dream board". If the bios functions are accessable from a running OS, then
the clock might be resettable on the fly. This could have a direct impact
on power savings for mobile systems as well. Sort of a poor-man's Crusoe
board.

JimK
Local Net Solutions

On Thu, 4 Jan 2001, Glenn C. Lasher Jr. wrote:

> This is a neat idea, and leaves me hypothetically wondering if it is
> possible to construct a MoBo that will gradually decrease the clockspeed
> in response to the CPU temp going over a particular threshold....  It
> would, of course, only do this after exhausting all other options, such as
> ramping up the various fan speeds.
> 
> On Thu, 4 Jan 2001, James Kinney wrote:
> 
> > How 'bout a cron job? Every minute, test the temp/voltage/etc. If temp is
> > high, renice the high cpu offenders to 20 until the temp drops.
> > 
> > Of course, if you are having consistent heat problems, you need to address
> > the hardware side of the problem with more cooling. The system should be
> > able to dissipate all the heat it produces even when under 100% CPU load
> > 24x7. The sensors are to warn of temp problems due to cooling system
> > failure. Throttling back cpu usage is a rather cludgy way to avoid another
> > noisy fan (or three).
> > 
> > JimK
> > Local Net Solutions
> > 
> > On Thu, 4 Jan 2001, Wandered Inn wrote:
> > 
> > > "Joseph A. Knapka" wrote:
> > > > 
> > > > Does anyone know of a command or system call that
> > > > one can issue to make an arbitrary process sleep
> > > > for a given amount of time? "[u]sleep" puts the current
> > > > process to sleep, but that's not what I need.
> > > > 
> > > > Rationale: I want to write a daemon that will monitor
> > > > CPU temp and put certain processes (Seti at home, etc)
> > > > to sleep for a while if it gets too high. Maybe
> > > > there's already something like this around? Or maybe
> > > > there's an easier way to accomplish the task that
> > > > someone can suggest?
> > > 
> > > The only way I can see to do this would be to have the processes you
> > > want to be able to make go to sleep look for a signal and when the
> > > signal is received, the process goes to sleep.  Since you probably don't
> > > want to modify a bunch of programs, you could write a wrapper program,
> > > or even a script that would do this.  I just threw together the
> > > following script I called 'sleepy':
> > > 
> > > trap 'echo I am tired; sleep 10' 16
> > > while :; do
> > >         date
> > >         sleep 2
> > > done
> > > 
> > > If you fire off this script, it writes the date out and sleeps.  If you
> > > send it a signal 16, it will print out 'I am tired', sleep 10 seconds
> > > and then resume.  Now this doesn't solve your problem completely as you
> > > couldn't just replace the 'date' with your programs.  What you might
> > > have to do is to kill the process you want to go to sleep, sleep the
> > > specified time, then fire the process up again.
> > > 
> > > Maybe someone will come up with a better solution?
> > > 
> > > 
> > > 
> > > 
> > > > 
> > > > Thanks,
> > > > 
> > > > -- Joe Knapka
> > > > --
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> > > 
> > > --
> > > Until later: Geoffrey		esoteric at denali.atlnet.com
> > > 
> > > "Great spirits have always found violent opposition from mediocre minds.
> > > The
> > > latter cannot understand it when a man does not thoughtlessly submit to
> > > hereditary prejudices but honestly and courageously uses his
> > > intelligence."
> > > - Albert Einstein
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> > 
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> 
> -- 
> glasher at nycap.rr.com
> After 163 days, Verizon still couln't deliver Telocity DSL.
> 

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