Date: Thu, 17 Jun 1999 13:43:26 +0200 From: Poul-Henning Kamp <phk@critter.freebsd.dk> To: "Andy V. Oleynik" <andyo@prime.net.ua> Cc: freebsd-bugs@FreeBSD.ORG Subject: Re: kern/12022: System clock timewarps Message-ID: <1047.929619806@critter.freebsd.dk> In-Reply-To: Your message of "Thu, 17 Jun 1999 00:20:02 PDT." <199906170720.AAA28120@freefall.freebsd.org>
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The TSC doesn't (always) work on K5/model0 I committed a fix for this
to -current recently.
Try to remove/comment out this line in i386/isa/clock.c:
init_timecounter(&tsc_timecounter);
In message <199906170720.AAA28120@freefall.freebsd.org>, "Andy V. Oleynik" writes:
>The following reply was made to PR kern/12022; it has been noted by GNATS.
>
>From: "Andy V. Oleynik" <andyo@prime.net.ua>
>To: freebsd-gnats-submit@freebsd.org, dwhite@pond.net
>Cc:
>Subject: Re: kern/12022: System clock timewarps
>Date: Thu, 17 Jun 1999 09:55:20 +0300
>
> I have 2 boxes at work:
> 1. Timecounter "i8254" frequency 1193182 Hz
> Timecounter "TSC" frequency 90040111 Hz
> CPU: AMD K5 model 0 (90.04-MHz 586-class CPU)
> Origin = "AuthenticAMD" Id = 0x501 Stepping=1
> Features=0x3bf<FPU,VME,DE,PSE,TSC,MSR,MCE,CX8,APIC>
> (BIOS reports: AMD-k5-PR90 CPU,
> Award Modular BIOS v4.51PG,
> Award P&P BIOS extension v1.0A,
> M/B 580VPX-ITE8661-2A5LDL1CC-0)
> 2.
> Sorry, I can't give Timecounters strings 'cos I've removed 3.2-S and
>
> installed 2.2.8-R on this PC due the clock bug.
> CPU: AMD K5 model 0 (74.54-MHz 586-class CPU)
> Origin = "AuthenticAMD" Id = 0x501 Stepping=1
> Features=0x3bf<FPU,VME,DE,PSE,TSC,MSR,MCE,CX8,APIC>
> (BIOS reports: AMD-k5-PR75 CPU,
> Award Modular BIOS v4.51PG release
> 03/03/1997S,
> Award P&P BIOS extension v1.0A,
> M/B I430VX-02071997C-00)
> Timecounters on 1st PC:
> Jun 14 09:58:28 volodya /kernel: Timecounter "i8254" frequency
> 1193182 Hz
> Jun 14 09:58:28 volodya /kernel: Timecounter "TSC" frequency
> 90040208 Hz
> Jun 14 14:55:40 volodya /kernel: Timecounter "i8254" frequency
> 1193182 Hz
> Jun 14 14:55:40 volodya /kernel: Timecounter "TSC" frequency
> 90040168 Hz
> Jun 14 14:58:47 volodya /kernel: Timecounter "i8254" frequency
> 1193182 Hz
> Jun 14 14:58:47 volodya /kernel: Timecounter "TSC" frequency
> 90039940 Hz
> Jun 15 09:20:31 volodya /kernel: Timecounter "i8254" frequency
> 1193182 Hz
> Jun 15 09:20:31 volodya /kernel: Timecounter "TSC" frequency
> 90040205 Hz
> Jun 15 17:25:56 volodya /kernel: Timecounter "i8254" frequency
> 1193182 Hz
> Jun 15 17:25:56 volodya /kernel: Timecounter "TSC" frequency
> 90039919 Hz
> Jun 16 09:22:18 volodya /kernel: Timecounter "i8254" frequency
> 1193182 Hz
> Jun 16 09:22:18 volodya /kernel: Timecounter "TSC" frequency
> 90039896 Hz
> Jun 17 09:46:25 volodya /kernel: Timecounter "i8254" frequency
> 1193182 Hz
> Jun 17 09:46:25 volodya /kernel: Timecounter "TSC" frequency
> 90039989 Hz
> Jun 17 09:52:11 volodya /kernel: Timecounter "i8254" frequency
> 1193182 Hz
> Jun 17 09:52:11 volodya /kernel: Timecounter "TSC" frequency
> 90040111 Hz
> On both was (on 1st remains) installed 3.2-R upgaded to STABLE.
> Again, kernel clock latancy on both is about 55 min/hour (real 1 hour =
> 5 min on PC).
> APM disabled on both.
>
> --
> WBW Andy V. Oleynik
>
> (prime.net.ua's sysadmin)
>
>
>
>
>
>
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--
Poul-Henning Kamp FreeBSD coreteam member
phk@FreeBSD.ORG "Real hackers run -current on their laptop."
FreeBSD -- It will take a long time before progress goes too far!
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