Top only showing one active CPU on HTT system
Tim Kellers
kellers at NJIT.EDU
Tue May 24 08:59:54 PDT 2005
On Tuesday 24 May 2005 11:53 am, Kirk Strauser wrote:
> I'm running a 5.4-STABLE system (updated as of May 16). My kernel is
> basically GENERIC with a few small tweaks, like commenting out extraneous
> "cpu" lines and adding "options SMP".
>
> My problem is that although dmesg shows every sign of having launched both
> logical CPUs:
>
> $ dmesg | grep -i cpu
> CPU: Intel(R) Xeon(TM) CPU 2.40GHz (2392.05-MHz 686-class CPU)
> Hyperthreading: 2 logical CPUs
> FreeBSD/SMP: Multiprocessor System Detected: 2 CPUs
> cpu0 (BSP): APIC ID: 0
> cpu1 (AP): APIC ID: 1
> cpu0: <ACPI CPU> on acpi0
> cpu1: <ACPI CPU> on acpi0
> SMP: AP CPU #1 Launched!
>
> ... running "top" only shows "0" in the CPU column for every task. I don't
> see anything out of place in sysctl:
>
> $ sysctl -a | grep -i hlt
> machdep.cpu_idle_hlt: 1
> machdep.hlt_cpus: 2
> machdep.hlt_logical_cpus: 0
>
> and /boot/loader.conf is all but empty. Honestly, I don't really know how
> long this has been going on. top used to show both 0 and 1 in the C column
> and I'm not exactly sure when it stopped. Any ideas?
From my /boot/loader.conf:
acpi_load="YES"
loader_color="yes"
PID USERNAME PRI NICE SIZE RES STATE C TIME WCPU CPU COMMAND
587 root 96 0 177M 44500K CPU0 0 630:12 10.94% 10.94% Xorg
41019 service 106 10 4680K 2632K RUN 0 0:01 0.05% 0.05% stonerview
uname -a
FreeBSD gilgamesh.maestro 5.4-STABLE FreeBSD 5.4-STABLE #3: Wed May 11
10:38:27 EDT 2005
service at gilgamesh.maestro:/usr/obj/usr/src/sys/GILGAMESH i386
The acpi_load="YES" in /boot/loader.conf might do the trick.
Tim Kellers
CPE/NJIT
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