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Re: SMP configuration

From: Eric Blake
Subject: Re: SMP configuration
Date: Mon, 17 May 2010 15:01:59 -0600
User-agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv: Gecko/20100430 Fedora/3.0.4-3.fc13 Lightning/1.0b1 Mnenhy/0.8.2 Thunderbird/3.0.4

On 05/17/2010 02:58 PM, Warren Young wrote:
> On 5/17/2010 10:40 AM, Eric Blake wrote:
>> On 05/17/2010 08:09 AM, Michael Menegakis wrote:
>>> On windows, probably because I had heard windows are very slow in
>>> creating new processes unlike UNIX, configuration is mindbogglingly
>>> slow.
>>> I wonder if there's a way to run it SMP ..-ish..
>> How is SMP going to change the number of processes to be run?
> Most of the tests in a configure script don't actually have to run in
> series.
> Writing the code to analyze all the tests and build a dependency graph
> would be pretty tricky, though.  Getting portable shells to launch N
> tests in parallel (where N is probably cores * 1.5 or so) at a time and
> integrate the results would be even trickier.  You could do it easier
> in, say, Erlang, but then you've thrown portability out the window.

The quagmire project uses make to perform its parallel checks, but it
requires that end users have GNU make installed.

Eric Blake   address@hidden    +1-801-349-2682
Libvirt virtualization library

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