From: Tim Hockin <thockin@hockin.org>
Message-Id: <200112110138.fBB1cqS09363@www.hockin.org>
Subject: Re: [RFC] Multiprocessor Control Interfaces
To: jason@baietto.com (Jason Baietto)
Date: Mon, 10 Dec 2001 17:38:51 -0800 (PST)
Cc: linux-kernel@vger.kernel.org
In-Reply-To: <1008035965.11626.3.camel@tofu> from "Jason Baietto" at Dec 10, 2001 08:59:23 PM
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Sender: linux-kernel-owner@vger.kernel.org

Please check, also:

http://www.hockin.org/~thockin/pset.   Not finished, but could be.


> Some people have asked me for more information before they'll attempt
> to download and play with this stuff, so here's the --help output from
> the latest version of the run(1) command:
> 
> 
> Usage: run [OPTIONS] { COMMAND [ARGS] | PROCESS_SPECIFIER }
> Set scheduling parameters and CPU bias for a new process or a list
> of existing processes.
> 
> OPTIONS can be one or more of the following options:
> 
>    -b, --bias=LIST        Set the CPU bias to the LIST of CPUs;
>                           CPUs are numbered starting from 0
>    -s, --policy=POLICY    Set the scheduling policy to POLICY
>    -P, --priority=LEVEL   Set the scheduling priority to LEVEL
>    -q, --quantum=QUANTUM  Set the SCHED_RR quantum to QUANTUM
>    -v, --version          Output version information and exit
>    -h, --help             Display this help and exit
> 
> PROCESS_SPECIFIER is exactly one of the following options:
> 
>    -p, --pid=LIST         Specify LIST of existing PIDs to modify
>    -g, --group=LIST       Specify LIST of process groups to modify; all
>                           existing processes in the groups will be modified
>    -u, --user=LIST        Specify LIST of users to modify; all existing
>                           processes owned by the users will be modified
>    -n, --name=LIST        Specify LIST of existing process names to modify
> 
> Multiple comma separated values can be specified for all LISTs and ranges
> are allowed where appropriate (e.g. "run -b 0,1-3 autopilot").
> 
> See the run(1) man page for more information.
> 
> 
> Take care,
> Jason
> 
> 
> > Hello All,
> > 
> > I'm currently working on adding multiprocessor control interfaces
> > to Linux.  My current efforts can be found here:
> > 
> >    http://www.ccur.com/realtime/oss
> > 
> > These are clean-room implementations of similar tools that have
> > been available in our proprietary *nix for quite some time, and
> > so the interfaces have a fair amount of mileage under their belts.
> > Note that the scope is somewhat wider than just MP.
> > 
> > There has been some discussion of "chaff" and other interfaces
> > recently on this list, so in an effort to hopefully move towards
> > a standard more quickly I've gotten permission from my employer
> > to GPL the code I've written.  I'm very interested in comments
> > and feedback on any or all of this work.
> > 
> > Here's the README file from the package:
> > 
> > 
> > This package contains:
> > 
> >    run(1)
> >       A multiprocessor control command line tool.
> > 
> >    mpadvise(3)
> >       A multiprocessor control library interface.
> > 
> > These services rely upon Robert Love's CPU Affinity patch
> > (version 2.4.16-1 was used for testing) which is available here:
> > 
> >    http://www.kernel.org/pub/linux/kernel/people/rml/cpu-affinity/v2.4/
> > 
> > To build the code, simply unpack it and type "make".  The code has
> > been tested on Red Hat 7.1 and 7.2 systems, though it is still
> > fairly new and almost certainly contains bugs.
> > 
> > An attempt was made to abstract the "cpuset" representation of
> > the current system in order to have binaries that in theory
> > could work on systems with more than 32 cpus.  For this to work,
> > the run(1) command would need to be linked against a shared
> > mpadvise(3) library (currently only a static library is made).
> > 
> > This code is being released in the hopes that it will become
> > the basis for the Linux multiprocessor control standard interfaces.
> > I am very interested in getting feedback on this package,
> > so please contact me via email or LKML if you have any.
> > 
> > This source code is licensed under the GNU GPL Version 2.
> > Copyright (C) 2001  Concurrent Computer Corporation
> > 
> > --
> > Jason Baietto
> > jason.baietto@ccur.com
> > http://www.ccur.com/realtime/oss
> 
> 
> 
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