[ale] Putting an arbitrary process to sleep

[Wandered Inn]

James Kinney wrote:
> 
> 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.

I don't know if it's accessible from the OS, but my ASUS p3b-f has bios
configurable processor speed.

> 
> 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
> > > > > --
> > > > > To unsubscribe: mail majordomo at ale.org with "unsubscribe ale" in message body.
> > > >
> > > > --
> > > > 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
> > > > --
> > > > To unsubscribe: mail majordomo at ale.org with "unsubscribe ale" in message body.
> > > >
> > >
> > > --
> > > To unsubscribe: mail majordomo at ale.org with "unsubscribe ale" in message body.
> > >
> >
> > --
> > glasher at nycap.rr.com
> > After 163 days, Verizon still couln't deliver Telocity DSL.
> >

--
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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