Messages in this thread |  | | Date | Mon, 6 Nov 2000 23:39:57 +0100 | | From | Pavel Machek <> | | Subject | Re: Loadavg calculation |
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Hi!
> > I'm working a project a work that is using Linux to run some very > > math-intensive calculations. One of the things we do is use the 1-minute > > loadavg to determine how busy the machine is and can we fire off another > > program to do more calculations. However, there's a problem with that. > > > > Because it's a 1 minute load average, there's quite a bit of lag time from > > when 1 program finishes until the loadavg goes down below a threshold for > > our control mechanism to fire off another program. > > > > Let me give an example (all on a 1-cpu PC) > > > > HH:MM:SS > > 00:00:00 fire off 4 programs > > 00:01:00 loadavg goes up to 4 > > 00:01:30 3 of the 4 programs finish loadavg still at 4 > > 00:02:20 load avg goes down to 1, below our threshold > > 00:02:21 we fire off 3 more programs. > > > > We'd like to reduce that almost 50 second lag time. Is it possible, in > > user-space, to duplicate the loadavg calculation period, say to a 15 > > second load average, using the information in /proc?
pavel@bug:~$ cat /proc/loadavg 0.00 0.00 0.00 2/46 395 pavel@bug:~$
The three values of 0.00 are loadavg averaged over different time. Select the right one and you are done. Pavel -- I'm pavel@ucw.cz. "In my country we have almost anarchy and I don't care." Panos Katsaloulis describing me w.r.t. patents at discuss@linmodems.org - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org Please read the FAQ at http://www.tux.org/lkml/
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