Hi all,

I may have done something a little, er, rash and crippled the performance of my system in the process...

Whilst endeavouring to learn about optimising my kernel, I managed to screw things up sufficiently to require me to use the "repair" option on the install DVD (SuSE 9.2).

When my machine restarted, I noticed gkrellm was only showing one cpu whereas previously, it'd shown two due courtesy of my H/T processor.

Running uname -a yields about what I'd expect:
Linux poochzilla 2.6.8-24.11-smp #1 SMP Fri Jan 14 13:01:26 UTC 2005 i686 i686 i386 GNU/Linux

But a check of the system startup log showed this:
Total of 1 processors activated (5914.62 BogoMIPS).
WARNING: 1 siblings found for CPU0, should be 2
ENABLING IO-APIC IRQs
..TIMER: vector=0x31 pin1=2 pin2=0
Brought up 1 CPUs

...which doesn't look right.

What have I managed to do and how can I get my full "two" processor goodness back?


Rik.

First, do 'cat /proc/cpuinfo' and see what that shows. Then see if SMT support is in your kernel, in addition to SMP.

Ok,
wikkus@poochzilla:~> cat /proc/cpuinfo
processor : 0
vendor_id : GenuineIntel
cpu family : 15
model : 2
model name : Intel(R) Pentium(R) 4 CPU 3.00GHz
stepping : 9
cpu MHz : 2998.947
cache size : 512 KB
physical id : 0
siblings : 2
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 pbe cid xtpr
bogomips : 5914.62

..and then copied from my .config (unless there's an easier way...?):
CONFIG_SMP=y
CONFIG_NR_CPUS=32
CONFIG_SCHED_SMT=y

...although, I did note that:
# CONFIG_MPENTIUM4 is not set
...whereas:
CONFIG_X86_GENERICARCH=y
CONFIG_X86_CYCLONE_TIMER=y
CONFIG_M586=y
CONFIG_X86_GENERIC=y
...and a bunch of other "X86_GENERIC" type stuff was...

Rik.

. . . bump? . . .

Sorry I didn't reply sooner.

Is that .config for the kernel currently running? Are you running a distro or hand-compiled kernel?