How FreeBSD manage more than 4GB on 32 bits architecture
johnl at iecc.com
Fri Apr 10 17:13:05 UTC 2015
>> If you need more than that, you use a 64 bit architecture.
>But it exists :-) We have a simulate environment, and a real
>prototype which have 24 clusters (i.e. 96 CPUs) and 96GB of physical
>memory. All of this with 32 RISC processors.
I believe they can build it. But I think you will find it very
difficult to program. Every system that requires programs to be
decomposed into cooperating loosely coupled parts to get full
performance has hit this wall.
>Thank you for your advices. I agree with you, but it's an internship,
>I can't say "Please, would you like to change all your CPUs for me ?"
>:-) Moreover, the main challenge is to deal with huge memory with 32
>bits processors (only RISC), I think it's really interesting.
It'll certainly be a learning experience, even if what you learn is
"don't do that again." Good luck.
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