Andi Kleen wrote:
On Tuesday 20 November 2007 04:50, Christoph Lameter wrote:
On Tue, 20 Nov 2007, Andi Kleen wrote:
You could in theory move the modules, but then you would need to implement
a full PIC dynamic linker for them first and also increase runtime overhead
for them because they would need to use a GOT/PLT.
On x86-64? The GOT/PLT should stay in cache due to temporal locality.
The x86-64 instruction set itself handles GOT-relative addressing rather
well; what's a 1% loss on x86 is like 0.01% on x86-64, so I'm thinking
100 times better?
I think I got this by `-fpic -pie` compiling nbyte benchmark versus
fixed position, each with and without on 32-bit (which made about a 1%
difference) and on 64-bit (which made a 0.01% difference). It was a
long time ago.
Still, yeah I know. Complexity.
(You have the ability to textrel these things too, and just rewrite
non-PIC, depending on how you feel about that)
--
Bring back the Firefox plushy!
http://digg.com/linux_unix/Is_the_Firefox_plush_gone_for_good
https://bugzilla.mozilla.org/show_bug.cgi?id=322367
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