x86_64 as Fedora's primary platform
drago01 at gmail.com
Tue Sep 28 18:57:30 UTC 2010
On Tue, Sep 28, 2010 at 8:49 PM, John Reiser <jreiser at bitwagon.com> wrote:
> On 09/28/2010 11:37 AM, drago01 wrote:
>> On Tue, Sep 28, 2010 at 8:09 PM, Mike McGrath <mmcgrath at redhat.com> wrote:
>>> We run 32 bit vms in Fedora Infrastructure a lot for purposes of memory
>>> density, we do it based on what will be running on the host as it doesn't
>>> always make sense to do so. It's worked out very well for us.
>> That's a valid case where it indeed makes sense, but I assume the
>> *host* is running x86_64.
> A x86_64 kernel with everything else i686 [no 64-bit apps] can be good
> non-virtually, too, particularly when it avoids 32-bit PAE for more than
> 3.3GB of RAM.
No it is pointless in 99% of the times, you lose stuff like:
SSE2 being part of the standard ABI and additional registers for no
real gain. (which can result into none or huge performance differences
depending on the situation).
More information about the devel