Messages in this thread | | | Date | Sat, 27 Dec 2003 15:50:16 -0800 | From | William Lee Irwin III <> | Subject | Re: Page Colouring (was: 2.6.0 Huge pages not working as expected) |
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Linus Torvalds <torvalds@osdl.org> writes: >> Basically: prove me wrong. People have tried before. They have failed. >> Maybe you'll succeed. I doubt it, but hey, I'm not stopping you.
On Sat, Dec 27, 2003 at 04:31:22PM -0700, Eric W. Biederman wrote: > For anyone taking you up on this I'd like to suggest two possible > directions. > 1) Increasing PAGE_SIZE in the kernel. > 2) Creating zones for the different colors. Zones were not > implemented last time, this was tried. > Both of those should be minimal impact to the complexity > of the current kernel. > I don't know where we will wind up but the performance variation's > caused by cache conflicts in today's applications are real, and easily > measurable. Giving the growing increase in performance difference > between CPUs and memory Amdahl's Law shows this will only grow > so I think this is worth looking at.
Increasing PAGE_SIZE in the kernel either (a) breaks ABI or (b) is nontrivial. I suppose I should try some of the page coloring benchmarks on pgcl (which preserves ABI).
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