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Special Forums News, Links, Events and Announcements Software Releases - RSS News CrissCross 0.6.6 (Default branch)
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Old 12-26-2007
CrissCross 0.6.6 (Default branch)
Image CrissCross is a small cross-platform C++ library for console and file I/O, fast data structures, CPU identification (CPUID), and sockets (TCP and UDP). The main goal is to provide the ability to write a program using identical calls on the major platforms (Windows, Linux, FreeBSD, OpenBSD, NetBSD, and Mac OS X) without needing to rewrite code. CPUID is only currently supported on Linux and Windows running on x86 processors. There is also theoretical support for IA-64 and x64 processors in 64-bit mode, but only 32-bit mode has been tested. License: BSD License (revised) Changes:
Visual Studio 2008 support added. CPUID now detects AMD cache descriptors. The ConvertToDArray and ConvertIndexToDArray functions were optimized, so the deprecation notice was removed. Stopwatch was fixed on FreeBSD, NetBSD, and OpenBSD. AVLTree, SplayTree, ShellSort, InsertionSort, and BubbleSort were added (the last two for educational purposes only). A basic HashTable implementation was added. AVLTree, RedBlackTree, and SplayTree have close-to-identical (if not perfectly identical) APIs. Some "using namespace" statements that were causing hard-to-detect errors were cleaned up. Many minor fixes were made.Image

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cpuid

CPUID(4)						     Linux Programmer's Manual							  CPUID(4)

NAME

       cpuid - x86 CPUID access device

DESCRIPTION

       CPUID provides an interface for querying information about the x86 CPU.

       This  device  is  accessed  by lseek (2) or pread (2) to the appropriate CPUID level and reading in chunks of 16 bytes.	A larger read size
       means multiple reads of consecutive levels.

       The lower 32 bits of the file position is used as the incoming %eax, and the upper 32 bits of the file position as the incoming	%ecx,  the
       latter intended for "counting" eax levels like eax=4.

       This  driver uses /dev/cpu/CPUNUM/cpuid, where CPUNUM is the minor number, and on an SMP box will direct the access to CPU CPUNUM as listed
       in /proc/cpuinfo.

       This file is protected so that it can only be read by the user root, or members of the group root.

NOTES

       The CPUID instruction can be directly executed by a program using inline assembler.  However this device allows convenient  access  to  all
       CPUs without changing process affinity.

       Most  of  the  information  in  cpuid  is  reported  by	the  kernel  in  cooked  form either in /proc/cpuinfo or through subdirectories in
       /sys/devices/system/cpu.  Direct CPUID access through this device should only be used in exceptional cases.

       The cpuid driver is not auto-loaded.  On modular kernels you might need to use the following command to load it explicitly before use:

	    $ modprobe cpuid

       There is no support for CPUID functions that require additional input registers.

       Very old x86 CPUs don't support CPUID.

SEE ALSO

       Intel Corporation, Intel 64 and IA-32 Architectures Software Developer's Manual Volume 2A: Instruction Set Reference, A-M, 3-180 CPUID ref-
       erence.

       Intel Corporation, Intel Processor Identification and the CPUID Instruction, Application note 485.

COLOPHON

       This  page is part of release 3.25 of the Linux man-pages project.  A description of the project, and information about reporting bugs, can
       be found at http://www.kernel.org/doc/man-pages/.

Linux								    2009-03-31								  CPUID(4)