<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0//EN" "http://www.w3.org/TR/REC-html40/strict.dtd"><html><head><meta name="qrichtext" content="1" /><style type="text/css">p, li { white-space: pre-wrap; }</style></head><body style=" font-family:'Droid Sans Mono'; font-size:10pt; font-weight:400; font-style:normal;">On Saturday 21 February 2009, Alex Merry wrote:<br>
> On Sunday 22 February 2009 00:18:22 Andriy Rysin wrote:<br>
> > I have a 2-core cpu so I was trying to improve KDE compile speed and the<br>
> > quickest solution I could come up with to put "-j 4" in the makeobj<br>
> > script in the make command call (build speed was up ~30% and I in a<br>
> > monitor I can see all cores are fully busy now). Though this solution<br>
> > feels a bit hackish so I was wandering if there's a better/standard way<br>
> > to do that? If makeobj is the right place may be we could make it more<br>
> > generic so it tries to detect number of cores automagically (at least for<br>
> > some most popular platforms)?<br>
><br>
> Well, you could just pass -j4 to makeobj, which will pass it on to make. <br>
> The best place to put that depends on what you use to build kde. If you<br>
> use the bash scripts on techbase, then you can just edit the cmakekde<br>
> function, which uses -j2 by default.<br>
><br>
> Alex<br>
<p style="-qt-paragraph-type:empty; margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px; -qt-user-state:0;"><br></p>Mind you probably the best option is -j 3 for a dual-core system (number of CPUs + 1). The one extra process is going to be the one doing I/O, the others will either be doing work on a CPU core or stuck waiting for I/O, so CPUs + 2 doesn't really help much.<br>
<p style="-qt-paragraph-type:empty; margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px; -qt-user-state:0;"><br></p>Regards,<br>
- Michael Pyne<br>
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