New EC2 instance types

[Clint Byrum]

Excerpts from Gustavo Niemeyer's message of Thu Mar 08 11:05:47 -0800 2012:
> On Thu, Mar 8, 2012 at 15:49, Clint Byrum <clint at ubuntu.com> wrote:
> > Other than the single-AMI issue, what benefit would using 64-bit on
> > m1.small gain us?
> 
> Pro x86 64-bit Linux
> - Extended register set
> - Parameter passing in registers
> - Native 64-bit arithmetics
> - Enhanced virtual address space
> 
> Contra x86 64-bit Linux
> - Larger memory footprint (larger binaries, 64-bit operands)
> - Cache utilization
> 
> http://www.amd64.org/fileadmin/user_upload/pub/64bit_Linux-Myths_and_Facts.pdf
> 
> Enhanced virtual address space is what I care about the most, but
> there are other reasons as per the document.
> 

Great paper, thanks.

With the big push for sub-second latency in web services, I think the
syscall latency is enough of a selling point for me to consider it a
big win for almost any workload that you might want to run on an m1.small.