Projects / x86info


Unlike other `cpuinfo' tools which just parse /proc/cpuinfo, x86info probes the CPU registers to find out a lot more information. It can discover the contents of model-specific registers, discover CPU silicon revisions, and lots more.

Operating Systems

Recent releases

  •  09 May 2012 15:32

    Release Notes: This release supports many processor variants and adds many minor fixes and enhancements.

    •  09 Aug 2009 14:15

      Release Notes: Support for many new CPUs was added. The program now supports FreeBSD and Solaris. Code was cleaned up and several minor bugs were fixed.

      •  06 Jun 2007 11:57

        Release Notes: Since the previous freshmeat announcement, many updates were made, allowing recognition of newer CPUs.

        •  07 Aug 2003 21:45

          Release Notes: Identifies several new CPUS. Additional MSR decoding on various CPUs. A few misidentification bugs have been fixed. Completely rewritten cachesize determination. Various new cache descriptors added. Numerous MHz estimation improvements. AMD K7 powernow register/BIOS decoding. Now decodes extended Intel feature flags, cpuid brand field, and sSpec on some models. AMD Opteron/Athlon64 support. VIA Powersaver/Longhaul support. A --bugs option to display CPU errata. No longer retries opening /dev/msr if the first open fails. Fixes a memory leak in --url.

          •  12 Nov 2002 09:27

            Release Notes: Better formatting for narrow terminals, a command line option to print the URL of an errata or datasheet if it is known, and extra verbosity. There was a Pentium 4 Xeon Northwood identification fix, the addition of socket types for AMD Clawhammer, more Pentium Pro steppings, and a reorganisation of Athlon MP/XP/4/Mobile determination. The flags/eflags per-CPU check now tests that MTRRs are available before dumping them, and the VIA Cyrix 3 cache size errata is mentioned when the workaround is in use. Various code cleanups were also made.


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