Jan Engelhardt (on Mon, 14 Aug 2006 13:38:22 +0200 (MEST)) wrote:
>Hello list,
>
>
>
>I cannot get HT to be used on some machine:
>
>w04a# cat /proc/cpuinfo
>processor : 0
>vendor_id : GenuineIntel
>cpu family : 15
>model : 0
>model name : Intel(R) Pentium(R) 4 CPU 1700MHz
>stepping : 10
>cpu MHz : 1694.890
>cache size : 256 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 up
>bogomips : 3393.46
>
>'ht' indicates:
>#define X86_FEATURE_HT (0*32+28) /* Hyper-Threading */
>
>so I installed an SMP kernel, which has
>CONFIG_SMP=y
>CONFIG_SUSPEND_SMP=y
>CONFIG_X86_FIND_SMP_CONFIG=y
>CONFIG_SCHED_SMT=y
>CONFIG_X86_HT=y
>
>yet it shows the 'up' flag in cpuinfo
>#define X86_FEATURE_UP (3*32+ 9) /* smp kernel running on up */
>
>What could be missing? Some BIOS option perhaps?
>Thanks for any hints.
It could be BIOS HT settings. You could also need CONFIG_ACPI, I have
seen HT systems which required ACPI before Linux could see the extra
threads.
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [email protected]
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
[Index of Archives]
[Kernel Newbies]
[Netfilter]
[Bugtraq]
[Photo]
[Stuff]
[Gimp]
[Yosemite News]
[MIPS Linux]
[ARM Linux]
[Linux Security]
[Linux RAID]
[Video 4 Linux]
[Linux for the blind]
[Linux Resources]
