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
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