Re: How to increase maximum user cpu usage allowed on a multi core system?

From: Borislav Petkov
Date: Tue Mar 17 2015 - 14:52:13 EST

On Tue, Mar 17, 2015 at 07:34:08PM +0100, poma wrote:
> On 09.03.2015 20:03, stan wrote:
> > I'm running Fedora 21 with a custom compiled kernel,
> > 3.19.0-1.20150211.fc21.x86_64.
> >
> > I have a multi core system with 6 cores. All are recognized by the
> > kernel.
> >
> > But, when I run a compile job with -j6, in order to allow all six cores
> > to be used, it limits the total amount of usage to 100% of a *single*
> > core. So, it might use all six cores, but the sum of the percentages
> > on those six cores is always around 100% of one core. This is from
> > htop output.

Let me try to understand this correctly?

You're building the kernel with

make -j6

but in htop you're seeing a single core at 100% and the rest are idle?
Yes, no?

What exact steps are you doing to build the kernel? Type them here
please so that I can do them exactly on my system too.

Also, please send a full dmesg from your system, private message is fine



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