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The story repeats itself

The story repeats itself

Posted Sep 19, 2007 17:23 UTC (Wed) by proski (subscriber, #104)
In reply to: The story repeats itself by khim
Parent article: Large pages, large blocks, and large problems

Isn't Core 2 64-bit? That problem is going away. And 16 Gb of RAM costs significantly more than a CPU and a motherboard that can support it properly, and it has always been like that.

The same applies to the cache. Changing the CPU will cost fraction of the memory it's supposed to support.


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The story repeats itself

Posted Sep 19, 2007 17:38 UTC (Wed) by khim (subscriber, #9252) [Link]

Core 2 is 64bit only, but people needed 16GiB of RAM years ago when x86-compatible 64bit CPUs were just a project. Thus PAE support was added to Linux.

The same - with TLB today: may be someday we'll have the truly balanced architecture but today - we don't. Add it's not clear if we'll have balanced architecture tomorrow: TLB must be fast (or else it's useless) but it's hard to create large and fast cache. Of course it's possible to use 2-level TLB (like AMD does today), but it's not some minor modification - it's possible that we'll be forced to wait few years till the new Intel's design. And all these years Linux will be worse then Windows... not a good position...

The story repeats itself

Posted Sep 19, 2007 22:44 UTC (Wed) by proski (subscriber, #104) [Link]

I don't see any references to Windows in the story.

The story repeats itself

Posted Sep 20, 2007 0:52 UTC (Thu) by sayler (guest, #3164) [Link]

"Core 2 is 64bit only"

No.

Oops

Posted Sep 20, 2007 21:09 UTC (Thu) by khim (subscriber, #9252) [Link]

Perils of editing. Initially I wanted so say that only "Core 2" is 64bit while Pentium 4 (except latest models of Prescott), Pentium 3 and so on are 32bit. Phrase was too cumbersome and I've removed everything but the "only" word was left after editing...


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