Re: sysctlbyname( "hw.availcpu" ) fails
Re: sysctlbyname( "hw.availcpu" ) fails
- Subject: Re: sysctlbyname( "hw.availcpu" ) fails
- From: Terry Lambert <email@hidden>
- Date: Wed, 27 Jun 2007 13:39:56 -0700
On Jun 27, 2007, at 1:09 PM, James Peach wrote:
On 27/06/07, Steve Checkoway <email@hidden> wrote:
On Jun 25, 2007, at 4:50 PM, Terry Lambert wrote:
> activecpu is the correct name; the manifest constant name was not
> changed because people have existing code that has to compile vs.
> the MIB version of the call.
Okay, I'll use that then.
> The preferred method for all sysctls going forward is to use
> sysctlbyname(), so that's what you should use in new code.
I did wonder about that. All of the examples I've seen on this list
have been of the sysctlbyname() type.
FWIW, sysctl is probably an easier (definitely more portable) way to
get at this info:
http://developer.apple.com/documentation/Darwin/Reference/ManPages/man3/sysconf.3.html
I think you meant sysconf (that's what the man page points to...)?
There's no portable sysconf()'s for CPU number/activity/SMT/etc.
identification. Linux has introduced a couple, but until everyone
agrees on scoping rules, it's not going to be safe to implement them,
since that may not end up being what The Austin Group decides will
make it into the standard, so it's impossible for anyone to adopt the
experimental ones Linux uses, and ensure binary backward compatibility
AND standards compliance at the same time.
-- Terry
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