On Feb 21, 2012, at 16:57 , R. Andrew Ohana wrote: > On Tue, Feb 21, 2012 at 15:37, Justin C. Walker <jus...@mac.com> wrote: >> >> On Feb 21, 2012, at 14:16 , R. Andrew Ohana wrote: >> >>> On Tue, Feb 21, 2012 at 10:30, Justin C. Walker <jus...@mac.com> wrote: >>>> >>>> On Feb 21, 2012, at 08:13 , R. Andrew Ohana wrote: >> [snip] >>>>> FYI, sqrt5 has been down for awhile since it is extremely prone to >>>>> kernel panics and I have yet to figure out the issue. My guess at this >>>>> point in time is that these are due to it using the 32-bit kernel, >>>>> which apple clearly isn't supporting any more -- the main requirement >>>>> of 10.8 over 10.7 is support for the 64-bit kernel. >>>> >>>> Is this true? >>> >>> Positive: >>> >>> $ uname -pr >>> 11.3.0 i386 >>> >>>> My 10.7 system has a 64-bit kernel, at least according to 'file': >>>> >>>> $ file /mach_kernel >>>> /mach_kernel: Mach-O universal binary with 2 architectures >>>> /mach_kernel (for architecture x86_64): Mach-O 64-bit executable x86_64 >>>> /mach_kernel (for architecture i386): Mach-O executable i386 >>> >>> OSX has included extensions in the 32-bit kernel to execute 64-bit >>> code since leopard (or potentially earlier), this only indicates that >>> the kernel + hardware supports executing 64-bit code. >> >> I don't think this is really correct. This is what the Apple website says: >> >> ========= >> These Macs use the 64-bit kernel by default in Mac OS X v10.6. >> >> • Mac Pro (Mid 2010) >> • MacBook Pro (Early 2011) >> • iMac (21.5-inch and 27-inch, Mid 2011) >> ========= > > Yes, although for lion it seems to be a much larger number of systems.
Not sure about that, but I don't know why that would be. >> >> I'm running the MacBook Pro (Early 2011). 'uname -pr' To be clear: I am running 10.7 on this MacBook. > Looking at another system that has booted with the 64-bit kernel it > seems that -p does not distinguish, but -m does: > > sqrt5:~ uname -m > i386 > > sage1:~ uname -m > x86_64 Yeah; the "-p" is the ISP architecture (the machine "api"): i386 is the common ISP architecture for (most) Intel processors; "-m" is the hardware type (in my case: Core i7), x86_64. > 'file /mach_kernel' matches on these two systems That's because Apple ships a single (universal) kernel binary that is intended to work on all supported systems. Cheers, Justin -- Justin C. Walker, Curmudgeon-at-Large () The ASCII Ribbon Campaign /\ Help Cure HTML Email -- To post to this group, send an email to sage-devel@googlegroups.com To unsubscribe from this group, send an email to sage-devel+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-devel URL: http://www.sagemath.org
