Date: Thu, 23 Jun 2011 11:25:30 -0400 From: Jung-uk Kim <jkim@FreeBSD.org> To: freebsd-current@FreeBSD.org Cc: Ian FREISLICH <ianf@clue.co.za> Subject: Re: Time keeping Issues with the low-resolution TSC timecounter Message-ID: <201106231125.34492.jkim@FreeBSD.org> In-Reply-To: <E1QZfAE-0001ql-MD@clue.co.za> References: <201106211704.04285.jkim@FreeBSD.org> <201106211653.34894.jkim@FreeBSD.org> <E1QZfAE-0001ql-MD@clue.co.za>
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On Thursday 23 June 2011 04:21 am, Ian FREISLICH wrote: > Jung-uk Kim wrote: > > On Tuesday 21 June 2011 04:53 pm, Jung-uk Kim wrote: > > > Can you please try the attached patch? It should disable > > > TSC/TSC-low timecounter for your CPU models, I think. > > > > Sorry, I attached a wrong patch. Please ignore the previous one > > and try this, instead. > > TSC-low is not presented as an option any more: > > CPU: Intel(R) Atom(TM) CPU N270 @ 1.60GHz (1596.03-MHz 686-class > CPU) Origin = "GenuineIntel" Id = 0x106c2 Family = 6 Model = 1c > Stepping = 2 > Features=0xbfe9fbff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTR >R,PGE,MCA,CMOV,PAT,CLFLUSH,DTS,ACPI,MMX,FXSR,SSE,SSE2,SS,HTT,TM,PBE> > Features2=0x40c39d<SSE3,DTES64,MON,DS_CPL,EST,TM2,SSSE3,xTPR,PDCM,M >OVBE> AMD Features2=0x1<LAHF> > TSC: P-state invariant, performance statistics > > Event timer "LAPIC" quality 400 > Timecounter "ACPI-fast" frequency 3579545 Hz quality 900 > acpi_timer0: <24-bit timer at 3.579545MHz> port 0x408-0x40b on > acpi0 atrtc0: <AT realtime clock> port 0x70-0x77 on acpi0 > atrtc0: Warning: Couldn't map I/O. > Event timer "RTC" frequency 32768 Hz quality 0 > hpet0: <High Precision Event Timer> iomem 0xfed00000-0xfed003ff irq > 0,8 on acpi0 Timecounter "HPET" frequency 14318180 Hz quality 950 > Event timer "HPET" frequency 14318180 Hz quality 450 > Event timer "HPET1" frequency 14318180 Hz quality 440 > Event timer "HPET2" frequency 14318180 Hz quality 440 > attimer0: <AT timer> port 0x40-0x43,0x50-0x53 on acpi0 > Timecounter "i8254" frequency 1193182 Hz quality 0 > Event timer "i8254" frequency 1193182 Hz quality 100 > > kern.timecounter.choice: TSC(-1000) i8254(0) HPET(950) > ACPI-fast(900) dummy(-1000000) It's already committed (r223426). Thanks! Jung-uk Kim
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