CPU Affinity, was RE: [Zope] Linux vs. UNIX vs. BSD

[sean.upton@uniontrib.com]

Sigh... I always thought Solaris was an exercise in feature-broken command
line tools (want to try unpackaging Zope without GNU tar anyone) ;)  The
first thing most sysadmins do is make Solaris act/look more like Linux by
installing boatloads of GNUish tools (bash,gcc,vim,tar,gzip), so if all that
is left is a kernel, it sort of defeats the point of the hassle (assuming
you could get the same with one build of a patched Linux kernel).

Unless patching and/or replacing all of user-space is easier than a kernel
build?  Perhaps if Sun adapted Debian's APT to support its pkg format (about
as likely as typing 'apt-get install msword' on my Windows box, I'd say)...

Sean

-----Original Message-----
From: Tim Hoffman [mailto:timhoffman@cams.wa.gov.au]
Sent: Tuesday, August 20, 2002 7:09 PM
To: sean.upton@uniontrib.com
Cc: myzope@gmx.net; zope@zope.org
Subject: Re: CPU Affinity, was RE: [Zope] Linux vs. UNIX vs. BSD


Thats what Solaris is for ;-) Processor affinity, processor sets, fair
share scheduler etc.... 

Rgds

Tim

On Wed, 2002-08-21 at 07:51, sean.upton@uniontrib.com wrote:
> This sounds better (and I think this is more advanced that the stuff
RedHat
> is doing, using Ingo Molnar's work in the O2 scheduler), because it is
(and
> should be) in this case simply a sysadmin task to make sure your Zope
> instances (and all the processes tied to a particular instance) is bound
to
> the same CPU.
> 
> This would also be nice in the case of being able to use a single SMP box
to
> run a ZEO cluster within using UNIX sockets for communication, and binding
> your ZEO clients (and the ZSS) to respective processors.
> 
> Sean
> 
> -----Original Message-----
> From: Oliver Bleutgen [mailto:myzope@gmx.net]
> Sent: Tuesday, August 20, 2002 3:01 PM
> To: sean.upton@uniontrib.com
> Cc: zope@zope.org
> Subject: Re: [Zope] Linux vs. UNIX vs. BSD
> 
> 
> sean.upton@uniontrib.com wrote:
> 
> 
> > Though we haven't used it yet, as I understand it, CPU affinity is
> important
> > to Python performance on SMP machines.   I expect that we will write or
> find
> > a simple user-space utility utilizing the new system calls to bind a
group
> > of processes to a single CPU.  I think, in theory, this will allow us to
> > successfully run two Zope instances on an inexpensive 2CPU machine, each
> > instance bound to a respective CPU.
> > 
> Heh, since I was looking at the page today, if you're talking about Robert
> Loves 
> 
> work, you can find it here:
> http://www.kernel.org/pub/linux/kernel/people/rml/cpu-affinity/
> 
> Very nice, since they have a proc-interface, so all you need is echo.
> 
> I haven't tested it, but it sounds nice.
> 
> cheers,
> oliver
> 
> 
> _______________________________________________
> Zope maillist  -  Zope@zope.org
> http://lists.zope.org/mailman/listinfo/zope
> **   No cross posts or HTML encoding!  **
> (Related lists - 
>  http://lists.zope.org/mailman/listinfo/zope-announce
>  http://lists.zope.org/mailman/listinfo/zope-dev )