Date: Wed, 08 Jan 2003 13:53:23 -0500 (EST) From: John Baldwin <jhb@FreeBSD.org> To: Andrew Gallatin <gallatin@cs.duke.edu> Cc: cvs-committers@FreeBSD.org, cvs-all@FreeBSD.org Subject: Re: cvs commit: src/sys/i386/i386 mp_machdep.c Message-ID: <XFMail.20030108135323.jhb@FreeBSD.org> In-Reply-To: <15900.24024.800260.88293@grasshopper.cs.duke.edu>
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On 08-Jan-2003 Andrew Gallatin wrote: > > John Baldwin writes: > > > > BTW, I'm surprised as hell that HT is enabled on my cpu. I did not > > > think that the "older" 2.53Ghz/533MHz FSB P4s had HT.. this box is 2 > > > months old. The board is an Intel Desktop D845EBG2. > > > > Well, it might not be. You would need to check your new dmesg to see > > if it is. Currently HT is only available on P4 Xeons. The acpi_cpu > > And the 3.06GHz P4s. > > Anyway, what's confusing me is that my cpu has CPU_HTT set in the > features: > > Features=0x3febfbff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CLFLUS > H,DTS,ACPI,MMX,FXSR,SSE,SSE2,SS,HTT,TM> > > I guess what you're saying is that even though it has hyperthreading > set in the features list, it may not have multiple hyperthreading > cores, so HTT in the features might just be a red herring. Yes. -- John Baldwin <jhb@FreeBSD.org> <>< http://www.FreeBSD.org/~jhb/ "Power Users Use the Power to Serve!" - http://www.FreeBSD.org/ To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe cvs-all" in the body of the message
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