[ale] Putting an arbitrary process to sleep

[Glenn C. Lasher Jr.]

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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