SMP with hyperthreading CPU (5.3)?
a at jenisch.at
Sat Oct 30 07:32:11 PDT 2004
I've got a 3GHz P4 system with hyperthreading enabled in the BIOS. For
this system I've built a SMP-kernel (kernel config-file "SMP" that
comes with 5.3).
However SMP doesn't seem to be enabled - at least I don't seen the
usual messages like "CPU ... launched" that's common with SMP
The only thing I'm seeing are the following entries during boot:
CPU: Intel(R) Pentium(R) 4 CPU 3.00GHz (2992.71-MHz 686-class CPU)
Origin = "GenuineIntel" Id = 0xf34 Stepping = 4
Hyperthreading: 2 logical CPUs
Neither does "top" show anything about a second (logical) cpu being
active, nor does ps.
So do I have two logical CPUs active on this system?
If not - what should I do besides enabling "SMP" in the kernel config
file (sure enough "cpu I386_CPU" which effectively disables SMP is
Thanks much in advance for any hints,
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