[gentoo-user] Re: Limit number of cores used by emerge?

Mark Knecht <markknecht@×××××.com> writes:

> Hi,
>    Is there a portage option that will limit the number of cores used
> by emerge? For instance, in a chroot on a 12 core machine I want to
> limit emerge to not using more than 3 cores?

I don't think there is a portage option for that. Perhaps you could use
schedtool?

with 'schedtool -a' you can specify a list of cpus a proces may run on.

>
>    If possible, I'd also like to limit the total disk bandwidth
> consumption during emerge. For instance, when untarring a big file to
> do the emerge at times the disk consumption gets to high and the
> machine becomes laggy. Is there an option that addresses this?

perhaps ionice is the tool for that?


--
 Christer