Messages in this thread | | | Date | Wed, 12 Feb 2003 21:26:04 +0530 | From | Balram Adlakha <> | Subject | Re: Problems with hyper-threading on Asus P4T533 / Linux 2.4.20 |
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On Wed, 12 Feb 2003 15:03:59 +0100 Lars Magne Ingebrigtsen <larsi@gnus.org> wrote:
> We've just gotten an Asus P4T533-based machine with a 3.06GHz P4 CPU, > bios version 1005. (P4T533 is i850e-based.) The bios claims that the > P4 has hyper-threading, and as you can see from the cpuinfo output > below, "ht" is among the flags. (And the manual says that P4T533 is > ht-enabled.) > > I've tried booting with acpismp=force and without, and it doesn't > seem to make much difference: Linux still only sees a single CPU. > I've also tried 2.4.21-pre4 and -ac4, which doesn't seem to make any > difference, either. > > Anybody got any ideas why I can't get this to work? > > buto:~# uname -a > Linux buto 2.4.20 #3 SMP Wed Feb 12 14:28:49 CET 2003 i686 unknown > buto:~# cat /proc/cpuinfo > processor : 0 > vendor_id : GenuineIntel > cpu family : 15 > model : 2 > model name : Intel(R) Pentium(R) 4 CPU 3.06GHz > stepping : 7 > cpu MHz : 3073.691 > cache size : 512 KB > fdiv_bug : no > hlt_bug : no > f00f_bug : no > coma_bug : no > fpu : yes > fpu_exception : yes > cpuid level : 2 > wp : yes > flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm > bogomips : 6134.16
Thats sounds alright, you have to have an SMP kernel to use HT. Build a new kernel with the SMP option checked. After that, you will see something like this with all that is above : siblings : 2
And cpuinfo will show info for 2 processors... - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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