CPU speed not reported correctly

From: Michael W. Oliver (michael_at_gargantuan.com)
Date: 12/29/04

  • Next message: David O'Brien: "Re: CPU speed not reported correctly" 
    Date: Wed, 29 Dec 2004 16:25:55 -0500
To: amd64@freebsd.org;, questions@freebsd.org

    Hello again folks. Here is the head of my `dmesg -a':

    Copyright (c) 1992-2004 The FreeBSD Project.
    Copyright (c) 1979, 1980, 1983, 1986, 1988, 1989, 1991, 1992, 1993, 1994
            The Regents of the University of California. All rights reserved.
    FreeBSD 6.0-CURRENT #3: Wed Dec 29 09:10:47 EST 2004
        mwoliver@gambit.gargantuan.com:/usr/obj/usr/src/sys/GAMBIT
    WARNING: debug.mpsafenet forced to 0 as ipsec requires Giant
    WARNING: MPSAFE network stack disabled, expect reduced performance.
    Preloaded elf kernel "/boot/kernel/kernel" at 0xffffffff8091e000.
    Preloaded elf obj module "/boot/kernel/sound.ko" at 0xffffffff8091e1a8.
    Preloaded elf obj module "/boot/kernel/snd_via8233.ko" at 0xffffffff8091e7d0.
    Preloaded acpi_dsdt "/boot/DSDT.aml" at 0xffffffff8091ed00.
    Preloaded elf obj module "/boot/kernel/ng_ubt.ko" at 0xffffffff8091ed50.
    Preloaded elf obj module "/boot/kernel/netgraph.ko" at 0xffffffff8091f278.
    Preloaded elf obj module "/boot/kernel/radeon.ko" at 0xffffffff8091f8a8.
    Preloaded elf obj module "/boot/kernel/agp.ko" at 0xffffffff8091fe50.
    ACPI APIC Table: <PTLTD APIC >
    Calibrating clock(s) ... i8254 clock: 1193174 Hz
    CLK_USE_I8254_CALIBRATION not specified - using default frequency
    Timecounter "i8254" frequency 1193182 Hz quality 0
    Calibrating TSC clock ... TSC clock: 801825045 Hz
    CPU: AMD Athlon(tm) 64 Processor 3400+ (801.83-MHz K8-class CPU)
      Origin = "AuthenticAMD" Id = 0xf4a Stepping = 10
      Features=0x78bfbff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CLFLUSH,MMX,FXSR,SSE,SSE2>
      AMD Features=0xe0500800<SYSCALL,NX,MMX+,LM,3DNow+,3DNow>
    L1 2MB data TLB: 8 entries, fully associative
    L1 2MB instruction TLB: 8 entries, fully associative
    L1 4KB data TLB: 32 entries, fully associative
    L1 4KB instruction TLB: 32 entries, fully associative
    L1 data cache: 64 kbytes, 64 bytes/line, 1 lines/tag, 2-way associative
    L1 instruction cache: 64 kbytes, 64 bytes/line, 1 lines/tag, 2-way associative
    L2 2MB unified TLB: 0 entries, disabled/not present
    L2 4KB data TLB: 512 entries, 4-way associative
    L2 4KB instruction TLB: 512 entries, 4-way associative
    L2 unified cache: 1024 kbytes, 64 bytes/line, 1 lines/tag, 16-way associative

    OK, here is my question: Why is the CPU speed reported as 801.83MHz?
    Is there something really wrong with my setup here? I have this machine
    configured to dual boot with the other OS being the x64 version of XP,
    and it reports a 2.2GHz CPU (for what it's worth...).

    Is this just some cosmetic thing, or is my CPU really running that slow?

    $ uname -a
    FreeBSD gambit.gargantuan.com 6.0-CURRENT FreeBSD 6.0-CURRENT #3: Wed
    Dec 29 09:10:47 EST 2004
    mwoliver@gambit.gargantuan.com:/usr/obj/usr/src/sys/GAMBIT amd64

    Thanks. 

    -- 
Michael W. Oliver
[see complete headers for contact information]

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