Hey there,
I was asked today in the board meeting about the use of NEON
routines in the kernel; I said we had looked into this but hadn't done
it because a) it wasn't conclusively better and b) if better, it would
need to be done conditionally per-platform. But I wanted to double-check
that's actually true (and I'm copying Vijay to keep me honest). I have
some references:
http://lists.linaro.org/pipermail/linaro-toolchain/2011-January/000722.html
http://groups.google.com/group/beagleboard/browse_thread/thread/12c7bd415fbc0993/c54dde7b9d55cf99?pli=1
http://www.spinics.net/lists/arm-kernel/msg106503.html
http://dev.gentoo.org/~armin76/arm/memcpy-neon_result.txt
https://wiki.linaro.org/WorkingGroups/ToolChain/Benchmarks/InitialMemcpy?highlight=%28memcpy%29
https://wiki.linaro.org/WorkingGroups/ToolChain/StringRoutines?highlight=%28memcpy%29
Incidentally, this ties into the question sent earlier this week which
had to do with Nico's work item in:
https://blueprints.launchpad.net/linux-linaro/+spec/other-kernel-thumb2
Which IIRC Nico says probably isn't worth it, right?
--
Christian Robottom Reis | [+55] 16 9112 6430 | http://launchpad.net/~kiko
Linaro Engineering VP | [ +1] 612 216 4935 | http://async.com.br/~kiko
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