[Clfs-support] Process scheduling and chrt

Ken Moffat zarniwhoop at ntlworld.com
Sun Apr 13 15:58:04 PDT 2008

On Sun, Apr 13, 2008 at 10:25:12PM +0530, jignesh gangani wrote:
> Hello,
> When I do 'top' on my system I do not see any process running with
> Real Time Priority but when I do 'top'
> on distros like RHEL or SuSE, I see some processes are running with
> Real Time Priority. When I searched
> for running processes with real time priority I get 'chrt' which is
> part of util-linux package.  When I searched
> for it on my system, I didn't get this command even though I have
> installed util-linux-2.12r package. Any
> comments?
> Mine is Pure64 Linux built using CLFS-1.0.0.
 First question - why does it matter ?

 Second question, if it really does matter - if you use the current
svn version (with util-linux-ng) does it match what happens on current
fedora and open-suse ?  If not, what are they doing differently
(take a look at their spec files), and why haven't they persuaded
upstream to do likewise ?  I don't ask about what happens on RHEL
because it is usually old, and carrying a lot of patches to backport
various changes to older versions.

 Alternatively, maybe it's a change to 'top' - I'm not at all
familiar with looking for real-time priority in it.

 The general rule of the LFS-family of books is that we think the
package developers usually know what to do.  Sometimes, particularly
on pure64 builds, that isn't always the case,

das eine Mal als Tragödie, das andere Mal als Farce

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