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hw.cpufamily vs ASP vs machine.h
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hw.cpufamily vs ASP vs machine.h


  • Subject: hw.cpufamily vs ASP vs machine.h
  • From: Stephane <email@hidden>
  • Date: Tue, 27 Feb 2007 19:32:25 +0100

I'm trying to find a solution to get the CPU Type on a Mac as it's displayed in Apple System Profiler.

A long time ago, I was using the mach APIs and host_processor_info to get the cpu type and subtype. I'm afraid this does not return good results on Intel Mac. On an iMac Core Duo, the subtype is said to be 4 and it does not match any reasonable value in machine.h.

I had a look at some IOKit source code that gets this info by looking at the cpu device_type but this has changed on Intel Mac. The "cpu" type does not exist anymore and the "processor" type does not return any valuable information at all for me.

I had a quick look at the sample code on the ADC website and it's using the Gestalt API and the constants in Carbon don't seem to be up- to-date.

I looked at the sysctl hw.cpufamily which is highlighted in mach/ machine.h (on Intel Mac only AFAIK) but I have some troubles with this:

On a Xserve Xeon, the returned value is:

hw.cpufamily: 1114597871

Intel Core 2.

Is the Xeon supposed to be a Core 2?

fillinzeblanks:~ stephane$ sysctl hw.cpufamily
hw.cpufamily: 1114597871
fillinzeblanks:~ stephane$ system_profiler
Hardware:

    Hardware Overview:

      Machine Name: Xserve
      Machine Model: Xserve1,1
      Processor Name: Dual-Core Intel Xeon

#define CPUFAMILY_INTEL_6_15 0x426f69ef  /* Intel Core 2 */

Any suggestion?


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