[GLLUG] question about 32 bit vs 64 bit Ubuntu 12.04

[Richard Houser]

It also depends on workload.  Video operations, virtualization, and
compilers are better on modern 64bit, since that is the only mode that
supports the whole hardware feature set (avx, vt-d, iommu, etc.).  Programs
that memory map disk access can similarly get a boost from the larger
address space, etc.
On Feb 5, 2013 3:02 PM, "Jonathan Billings" <billings at negate.org> wrote:

> On Tue, Feb 05, 2013 at 10:59:53AM -0800, Troy wrote:
> > Presently I am running 32 bit Ubuntu 12.04. I was wondering if it is
> > possible, with my current processor and motherboard, to speed up the
> > execution of 12.04. Thanks and stay warm... troy
>
> Running a 64-bit OS on a system that's working fine on a 32-bit OS,
> assuming you have less than 4G of RAM, will probably not produce a
> noticeable speed increase.  64-bit binaries are a bit larger on
> average, so some aspects might be slower.
>
> PAE kernels are a lot slower with >4G of RAM regarding memory
> operations, though, which is why everyone is asking how much RAM you
> have.
>
> --
> Jonathan Billings <billings at negate.org>
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>
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