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<blockquote data-quote="Amen-Moses" data-source="post: 329463" data-attributes="member: 114"><p>Tiger will do that!</p><p></p><p>What Leopard will do is give more than one processor to an app if it can make use of it, without the app even being aware of it. </p><p></p><p>What this means in practice is that let's say you are using Tiger and have an app producing a DVD and Photoshop processing an image, the other two processors will be pretty much idle (maybe one core running iTunes and Safari using maybe 25%). In Leopard any system calls made by the two heavy apps can be spread over onto the spare processing capacity of the other cores so it will actually start to make sense having 8 or even 16 cores (Intel have just built an 80 core just as a demonstrator) in a desktop machine.</p><p></p><p>I think that is probably the only reason Apple haven't announce 8 core machines yet, the OS just won't make good use of them for anything practical.</p><p></p><p>Of course only well behaved apps will have this boost but seeing as how this was demonstrated months ago to the developers I imagine any big hitters (Photoshop for definite) will already have been rewritten where needed to make the most of this (i.e replace custom graphics routines with Core Image calls). </p><p></p><p>Amen-Moses</p></blockquote><p></p>
[QUOTE="Amen-Moses, post: 329463, member: 114"] Tiger will do that! What Leopard will do is give more than one processor to an app if it can make use of it, without the app even being aware of it. What this means in practice is that let's say you are using Tiger and have an app producing a DVD and Photoshop processing an image, the other two processors will be pretty much idle (maybe one core running iTunes and Safari using maybe 25%). In Leopard any system calls made by the two heavy apps can be spread over onto the spare processing capacity of the other cores so it will actually start to make sense having 8 or even 16 cores (Intel have just built an 80 core just as a demonstrator) in a desktop machine. I think that is probably the only reason Apple haven't announce 8 core machines yet, the OS just won't make good use of them for anything practical. Of course only well behaved apps will have this boost but seeing as how this was demonstrated months ago to the developers I imagine any big hitters (Photoshop for definite) will already have been rewritten where needed to make the most of this (i.e replace custom graphics routines with Core Image calls). Amen-Moses [/QUOTE]
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