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- Subject: Re: [ANN] Lua 5.3.0 (work1) now available
- From: Jay Carlson <nop@...>
- Date: Tue, 9 Jul 2013 20:44:33 -0400
On Jul 9, 2013, at 10:52 AM, Luiz Henrique de Figueiredo wrote:
> However, I think that Roberto tested that program on a machine for which
> the conversion int <-> float is costly. I'm not sure modern machines have
> this problem.
> Bottom line, the work version is meant to be tested and feedback sent. Thanks.
I've got a big pile of embedded Linux boxes of various architectures. What I don't have is a reproducible test load. (I currently believe my core problems on the smaller machines is fun memory hierarchy effects and they're largely not Lua's problem.) If you have a suggestion for a self-contained set of work1/5.2/5.1 C/Lua code I'll obsessively test it in a bunch of toolchains, ABIs, ISAs, etc etc. I'd be happy to put a bunch of them in a network "rubber room" with ssh access to a configured x86_64 OpenWrt build host if it would be helpful. Tools like the malta MIPS simulators can be a lot more useful in analysis but a first pass on "real hardware" is always satisfying.
: I repeat myself, but: 1) The goal of an operating system is to use as much memory as possible. 2) Q: How much memory is this Lua MIPS process using? A: Two pages. The location of the instruction pointer, and the destination of any load or store.