On 14/01/2008, Alexander Schrijver <[EMAIL PROTECTED]> wrote: > On Jan 14, 2008 11:52 AM, Andreas Kahari <[EMAIL PROTECTED]> wrote: > > Hi, > > > > Is there a way of limiting the amount of CPU given to a particular > > process or process group? For example, I would want the build of the > > qt4 port to use a maximum of 25% of the available CPU, leaving the CPU > > 75% idle if nothing else is happening on the machine. > > > > I know about 'nice', but it doesn't fulfil the criteria that the > > machine is left otherwise idle if nothing else runs on it. > > > > I don't have a real reason for why I would want to do this, I'm mainly > > curious as to if it's possible. [cut] > > I have never done this myself, but I believe this is possible by > creating a login class in /etc/login.conf and set the cputime option. > See login.conf(5) for a better description.
Hi Alexander, I believe that the cputime resource limit will limit the maximum amount of CPU time that the user may use in a session, which is not really what I asked for. I'd like the process or process group to run for as long as it needs to run, but that it only ever uses a fraction of the CPU power. It's like limiting the network bandwidth for a particular type of traffic, only this is about time on the CPU. Regards, Andreas -- Andreas Kahari Somewhere in the general Cambridge area, UK
