[Openmcl-devel] OpenMCL for x86 OS X
palter at clozure.com
Fri May 11 21:42:57 UTC 2007
On May 11, 2007, at 5:35 PM, Rainer Joswig wrote:
> In article <20070511140603.D14953 at clozure.com>,
> Gary Byers <gb at clozure.com> wrote:
>> Just to add to the confusion a bit:
>> - every Mac that Apple's introduced since August 2006 has been 64-
>> bit capable
>> (either a Xeon - as used in the Mac Pro - or a Core 2 Duo as
>> used in
>> everything else.)
>> - The Mac Mini is the only current Mac that (last time I checked) was
>> 32-bit only. Everything that Apple introduced in the first 8
>> of 2006 was also based on 32-bit-only chips (usually "Core
>> Duo", but
>> there may have been some Core Solos in there as well.)
> The missing update of the Mac mini is a bit tragic. ;-)
Rumor has it that the mini will be updated soon. (Of course, that's
been the rumor for months now.)
> What about the Apple TV? I'm not sure if it is 64bit capable.
> Though it has some kind of Intel CPU and runs a version
> of Mac OS X 10.4.
It has a Pentium M in it, so it's 32-bit.
>> - In Tiger, about the only framework/library that's available in a
>> 64-bit version is "libSystem" (i.e., more-or-less the C runtime
>> library). Apple did make a big point of announcing that
>> (including Carbon and Cocoa) would be available in both 32-bit and
>> 64-bit versions in Leopard.
>> There's almost certainly an easier way to tell, but one way of
>> determining whether or not a Mac CPU is 64-bit-capable is:
>> shell> sysctl hw.optional.x86_64
>> If that returns the key "hw.optional.x86_64" with the value "1",
>> then the OS believes that the machine it's running on can run in
>> 64-bit ("x86_64") mode.
>> As funky as that test might be, it might be more reliable than trying
>> to guess from the brand name, which might be something like
>> "Centrino II
>> Pair Couplet" before long.
>> On Fri, 11 May 2007, David Steuber wrote:
>>> On May 10, 2007, at 11:00 PM, Andrew Shalit wrote:
>>>> The Core 2 Duo is a 64-bit cpu. The Core Duo in the original
>>>> MacBook Pro is a 32-bit machine.
>>>> See http://www.intel.com/pressroom/archive/releases/
>>>> I'm writing this to you on a 64-bit laptop, and apparently you're
>>>> reading it on one, too. Congrats!
>>>> (And yes, OpenMCL runs great on it.)
>>> OK, I put this to the ultimate test. I really wasn't believing what
>>> I was reading because Apple was not going out of their way to
>>> "64 bit!" like they did with the G5. But...
>>> david at Jupiter.local:~
>>> $ openmcl64
>>> Welcome to OpenMCL Version 1.1-pre-070408 (DarwinX8664)!
>>> ? most-positive-fixnum
>>> ? (room)
>>> Approximately 33,292,288 bytes of memory can be allocated
>>> before the next full GC is triggered.
>>> Total Size Free Used
>>> Lisp Heap: 47710208 (46592K) 33292288 (32512K) 14417920
>>> Stacks: 11426144 (11158K) 11421976 (11154K) 4168
>>> Static: 1511664 (1476K) 0 (0K) 1511664
>>> 506834.500 MB reserved for heap expansion.
>>> The proof is in the running. WOW!
>>> Let's see how well this works with Emacs + SLIME.
>>> Good job, Gary & Co!
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